Create dynamic table to add new entry with button

Create dynamic table to add new entry with button - java

I am trying to build a register, so that when a button is clicked, a new entry appears on a table. Ideally, I am looking to build a table on the left side of the screen, with two rows and new column appears when the button is clicked. I want the table to have a fixed size, but it should be scrollable after a certain amount of entries. So far, I have created and formatted the JButton objects that I want to be clicked for a new entry to appear. I also know that I should use a JTable to pursue this.
How should I go about making this dynamic table?
Code So Far:
private void addRegister(JPanel pane) {
JPanel everythingPane = new JPanel();
JPanel pluPane = new JPanel();
Dimension button = new Dimension(200,150);
JTable pluTable = new JTable();
JPanel buttonPane = new JPanel();
buttonPane.setLayout(new BoxLayout(buttonPane, BoxLayout.Y_AXIS));
//JPanel buttonPane = new JPanel (new FlowLayout (FlowLayout.LEFT));
JPanel subPane1 = new JPanel();
subPane1.setAlignmentX(LEFT_ALIGNMENT);
JPanel subPane2 = new JPanel();
subPane2.setAlignmentX(LEFT_ALIGNMENT);
JPanel subPane3 = new JPanel();
subPane3.setAlignmentX(LEFT_ALIGNMENT);
JPanel subPane4 = new JPanel();
subPane4.setAlignmentX(LEFT_ALIGNMENT);
JPanel subPane5 = new JPanel();
subPane5.setAlignmentX(LEFT_ALIGNMENT);
JPanel alignmentLayer = new JPanel();
JButton frappuccino = new JButton("Frappuccino");
JButton icedCoffee = new JButton("Iced Coffee");
frappuccino.setPreferredSize(button);
icedCoffee.setPreferredSize(button);
JButton arizona = new JButton("Arizona Green Tea");
JButton izze = new JButton("Izze");
arizona.setPreferredSize(button);
izze.setPreferredSize(button);
JButton snapple = new JButton("Snapple");
JButton gatorade = new JButton("Gatorade");
snapple.setPreferredSize(button);
gatorade.setPreferredSize(button);
JButton water = new JButton("Water");
JButton appleJuice = new JButton("Apple Juice");
water.setPreferredSize(button);
appleJuice.setPreferredSize(button);
JButton orangeJuice = new JButton("Orange Juice");
JButton mentos = new JButton("Mentos");
orangeJuice.setPreferredSize(button);
mentos.setPreferredSize(button);
JButton gum = new JButton("Gum");
JButton cliffBar = new JButton("Cliff Bar");
gum.setPreferredSize(button);
cliffBar.setPreferredSize(button);
JButton littleBites = new JButton("Little Bites");
JButton welchs = new JButton("Welch's Fruit Snacks");
littleBites.setPreferredSize(button);
welchs.setPreferredSize(button);
JButton fiberOneBar = new JButton("Fiber One Bar");
JButton fiberOneBrownie = new JButton("Fiber One Brownie");
fiberOneBar.setPreferredSize(button);
fiberOneBrownie.setPreferredSize(button);
JButton cheezeIts = new JButton("Cheeze Its");
JButton goldFish = new JButton("Gold Fish");
cheezeIts.setPreferredSize(button);
goldFish.setPreferredSize(button);
JButton teaBag = new JButton("Tea Bag");
JButton poptarts = new JButton("Poptarts");
teaBag.setPreferredSize(button);
poptarts.setPreferredSize(button);
JButton sampleButton = new JButton("Sample Button");
JButton sampleButton2 = new JButton("Sample Button");
sampleButton.setPreferredSize(button);
sampleButton2.setPreferredSize(button);
JButton sampleButton3 = new JButton("Sample Button");
JButton sampleButton4 = new JButton("Sample Button");
sampleButton3.setPreferredSize(button);
sampleButton4.setPreferredSize(button);
subPane1.add(frappuccino);
subPane1.add(icedCoffee);
subPane1.add(arizona);
subPane1.add(izze);
subPane2.add(snapple);
subPane2.add(gatorade);
subPane2.add(water);
subPane2.add(appleJuice);
subPane3.add(orangeJuice);
subPane3.add(mentos);
subPane3.add(gum);
subPane3.add(cliffBar);
subPane4.add(littleBites);
subPane4.add(welchs);
subPane4.add(fiberOneBar);
subPane4.add(fiberOneBrownie);
subPane5.add(cheezeIts);
subPane5.add(goldFish);
subPane5.add(teaBag);
subPane5.add(poptarts);
alignmentLayer.add(sampleButton);
alignmentLayer.add(sampleButton2);
alignmentLayer.add(sampleButton3);
alignmentLayer.add(sampleButton4);
buttonPane.add(subPane1);
buttonPane.add(subPane2);
buttonPane.add(subPane3);
buttonPane.add(subPane4);
buttonPane.add(subPane5);
buttonPane.add(Box.createRigidArea(new Dimension(5,100)));
buttonPane.add(alignmentLayer);
pluPane.add(pluTable);
everythingPane.add(pluPane);
everythingPane.add(buttonPane);
pane.add(everythingPane);
}

JTable is more commonly used in a way that adds rows, rather than columns. I re-factored this example to illustrate the basic idea below. Each time the button is clicked, a new row is added to the table's model, which updates the table itself.
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.Rectangle;
import java.awt.event.ActionEvent;
import java.awt.event.AdjustmentEvent;
import java.awt.event.AdjustmentListener;
import javax.swing.AbstractAction;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollBar;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.DefaultTableModel;
/**
* #see https://stackoverflow.com/a/19472190/230513
* #see https://stackoverflow.com/a/7519403/230513
*/
public class TableAddTest extends JPanel {
private static final int N_ROWS = 8;
private static String[] header = {"ID", "String", "Number", "Boolean"};
private DefaultTableModel dtm = new DefaultTableModel(null, header) {
#Override
public Class<?> getColumnClass(int col) {
return getValueAt(0, col).getClass();
}
};
private JTable table = new JTable(dtm);
private JScrollPane scrollPane = new JScrollPane(table);
private JScrollBar vScroll = scrollPane.getVerticalScrollBar();
private int row;
private boolean isAutoScroll;
public TableAddTest() {
this.setLayout(new BorderLayout());
Dimension d = new Dimension(320, N_ROWS * table.getRowHeight());
table.setPreferredScrollableViewportSize(d);
for (int i = 0; i < N_ROWS; i++) {
addRow();
}
scrollPane.setVerticalScrollBarPolicy(
JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
vScroll.addAdjustmentListener(new AdjustmentListener() {
#Override
public void adjustmentValueChanged(AdjustmentEvent e) {
isAutoScroll = !e.getValueIsAdjusting();
}
});
this.add(scrollPane, BorderLayout.CENTER);
JPanel panel = new JPanel();
panel.add(new JButton(new AbstractAction("Add Row") {
#Override
public void actionPerformed(ActionEvent e) {
addRow();
}
}));
this.add(panel, BorderLayout.SOUTH);
}
private void addRow() {
char c = (char) ('A' + row++ % 26);
dtm.addRow(new Object[]{
Character.valueOf(c),
String.valueOf(c) + String.valueOf(row),
Integer.valueOf(row),
Boolean.valueOf(row % 2 == 0)
});
}
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
#Override
public void run() {
JFrame f = new JFrame();
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
TableAddTest nlt = new TableAddTest();
f.add(nlt);
f.pack();
f.setLocationRelativeTo(null);
f.setVisible(true);
}
});
}
}

Related

GUI Card Layout- Action Listener not working [duplicate]

This question already has answers here:
What is a NullPointerException, and how do I fix it?
(12 answers)
Closed 3 years ago.
I only have the first button set up to work. It was working fine until I updated panel one to have additional panels (oneTwo,oneThree, etc.). I did this because I have to make the program look like this
=> Example
but now when i click the first button it no longer switched to card two. I cant figure it out.
Here is my code
public class AddressBook implements ActionListener {
static CardLayout contentPaneLayout;
static JButton B1= new JButton("Create a New Address"), B2= new JButton("Load Contacts"), B3= new JButton("Add New Contacts"),
B4= new JButton("View/Delete Contacts"), B5= new JButton("Backup Contacts"), B6= new JButton("Exit"), B7 = new JButton ("Cancel");
static JTextField TF1 = new JTextField(13), TF2 = new JTextField (13);
static JLabel L1 = new JLabel ("Use The Buttons Below To Manage Contacts",JLabel.CENTER), L2 = new JLabel ("This is Card 2"), L3 = new JLabel("Username:",JLabel.CENTER),
L4 = new JLabel("Number of Contacts:",JLabel.CENTER);;
static Container contentPane;
public void actionPerformed(ActionEvent e) {
Object click = e.getSource();
if (click==B1) contentPaneLayout.show(contentPane,"Card 2");
if (click==B6) System.exit(0);
if (click==B7) contentPaneLayout.show(contentPane, "Card 1");
}
public static void main(String[] args) {
JFrame frm = new JFrame("Address Book");
contentPane = frm.getContentPane();
contentPane.setLayout(new CardLayout());
JPanel one = new JPanel (new GridLayout( 5,5 ));
JPanel two = new JPanel (new GridLayout(4,6));
JPanel oneTwo = new JPanel(new FlowLayout());
JPanel oneThree = new JPanel(new GridLayout(2,3,6,5));
JPanel oneFour = new JPanel(new GridLayout());
JPanel oneFive = new JPanel(new GridLayout());
one.add (L1);
oneTwo.add (L3);
oneTwo.add (TF1);
TF1.setEditable(false);
TF2.setEditable(false);
oneTwo.add(L4);
oneTwo.add(TF2);
one.add(oneFive);
one.add(oneTwo);
oneThree.add(B1); oneThree.add(B2);oneThree.add(B3);oneThree.add(B4);oneThree.add(B5);oneThree.add(B6);
one.add(oneFour);
one.add(oneThree);
two.add(L2);
two.add(B7);
contentPane.add("Card 1", one);
contentPane.add("Card 2", two) ;
//contentPaneLayout.show(contentPane, "Card 1");
ActionListener AL= new AddressBook();
B1.addActionListener(AL); B7.addActionListener(AL); B6.addActionListener(AL);
frm.pack();
frm.setSize(550,250);
frm.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frm.setVisible(true);
}
}

You have a NullPointerException
contentPaneLayout.show(contentPane, "Card 2");
contentPaneLayout is never assigned a value.
This is exacerbated by the over zealous use of static
A little bit of rework and you have a slightly better solution
import java.awt.CardLayout;
import java.awt.Container;
import java.awt.EventQueue;
import java.awt.FlowLayout;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;
public class AddressBook implements ActionListener {
private CardLayout contentPaneLayout;
private JButton b1 = new JButton("Create a New Address"), b2 = new JButton("Load Contacts"), b3 = new JButton("Add New Contacts"),
b4 = new JButton("View/Delete Contacts"), b5 = new JButton("Backup Contacts"), b6 = new JButton("Exit"), b7 = new JButton("Cancel");
private JTextField tf1 = new JTextField(13), tf2 = new JTextField(13);
private JLabel l1 = new JLabel("Use The Buttons Below To Manage Contacts", JLabel.CENTER), l2 = new JLabel("This is Card 2"), l3 = new JLabel("Username:", JLabel.CENTER),
l4 = new JLabel("Number of Contacts:", JLabel.CENTER);
private Container contentPane;
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
#Override
public void run() {
new AddressBook();
}
});
}
public AddressBook() {
JFrame frm = new JFrame("Address Book");
contentPane = frm.getContentPane();
contentPaneLayout = new CardLayout();
contentPane.setLayout(contentPaneLayout);
JPanel one = new JPanel(new GridLayout(5, 5));
JPanel two = new JPanel(new GridLayout(4, 6));
JPanel oneTwo = new JPanel(new FlowLayout());
JPanel oneThree = new JPanel(new GridLayout(2, 3, 6, 5));
JPanel oneFour = new JPanel(new GridLayout());
JPanel oneFive = new JPanel(new GridLayout());
one.add(l1);
oneTwo.add(l3);
oneTwo.add(tf1);
tf1.setEditable(false);
tf2.setEditable(false);
oneTwo.add(l4);
oneTwo.add(tf2);
one.add(oneFive);
one.add(oneTwo);
oneThree.add(b1);
oneThree.add(b2);
oneThree.add(b3);
oneThree.add(b4);
oneThree.add(b5);
oneThree.add(b6);
one.add(oneFour);
one.add(oneThree);
two.add(l2);
two.add(b7);
contentPane.add("Card 1", one);
contentPane.add("Card 2", two);
//contentPaneLayout.show(contentPane, "Card 1");
b1.addActionListener(this);
b7.addActionListener(this);
b6.addActionListener(this);
frm.pack();
frm.setSize(550, 250);
frm.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frm.setVisible(true);
}
#Override
public void actionPerformed(ActionEvent e) {
Object click = e.getSource();
System.out.println("...");
if (click == b1) {
contentPaneLayout.show(contentPane, "Card 2");
}
if (click == b6) {
System.exit(0);
}
if (click == b7) {
contentPaneLayout.show(contentPane, "Card 1");
}
}
}
The important change is in the constructor...
contentPaneLayout = new CardLayout();
contentPane.setLayout(contentPaneLayout);

miglayout with jtable with issue

I have used miglayout in swing applicaion.I have encounted one issue like jtable cant appear in whole frame it show only left side some area.
i want to show untill at right side end of jframe edge
My implemantaion code is below
package test;
import java.awt.EventQueue;
import java.util.Arrays;
import javax.swing.DefaultListModel;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JList;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.SwingConstants;
import javax.swing.table.DefaultTableModel;
import net.miginfocom.swing.MigLayout;
public class ProductPanel2 extends JPanel {
private JLabel lblProd;
private JButton butAdd;
private JButton butRemove;
private JButton butEdit;
private JScrollPane scroll;
private JTable table;
private static final long serialVersionUID = 1L;
public JList<String> lst_Options;
private JScrollPane scr_Data;
private JComboBox<ComboItem> cmb_Suppliers;
//Generar de inmediato
private JButton btn_NewUpdate;
private JButton btn_Delete;
private JButton btn_Copy;
private JTable tbl_Settings;
private JLabel lbl_SelectedOption;
DefaultListModel<String> modeloOpciones;
public ProductPanel2() {
initComponents();
}
private void initComponents() {
lblProd = new JLabel("Product List: ");
btn_NewUpdate = new JButton("Add");
btn_Delete = new JButton("Remove");
lbl_SelectedOption = new JLabel("Tipo de datos");
JLabel lbl_Opciones = new JLabel("Opciones");
lst_Options = new JList<String>();
modeloOpciones = new DefaultListModel<String>();
btn_Delete = new JButton("Eliminar");
btn_NewUpdate = new JButton("Nuevo");
scr_Data = new JScrollPane();
cmb_Suppliers = new JComboBox<ComboItem>();
modeloOpciones.addElement("Proveedores");
modeloOpciones.addElement("Productos");
modeloOpciones.addElement("Partidas");
lst_Options.setModel(modeloOpciones);
tbl_Settings = createTable();
tbl_Settings.setFillsViewportHeight(true);
scr_Data = new JScrollPane(tbl_Settings);
JPanel filterPanel=new JPanel();
setLayout(new MigLayout("debug", "[96px][][94.00][grow][149.00px][2px][161px]", "[16px][240px,grow][12px][29px]"));
//add(lbl_SelectedOption, "cell 1 0,alignx left,sgx");
add(lst_Options, "cell 0 1 1 5,grow");
filterPanel.add(scr_Data,"wrap, sg buttons");
// filterPanel.add(cmb_Suppliers, "");
add(filterPanel,"span 2 3, grow, wrap");
scr_Data.setViewportView(tbl_Settings);
lbl_Opciones.setHorizontalAlignment(SwingConstants.CENTER);
add(lbl_Opciones, "cell 0 0,growx,aligny top");
add(btn_Delete, "cell 6 3,alignx right,aligny bottom");
add(btn_NewUpdate, "cell 4 3,alignx right,aligny bottom");
refreshCombo(cmb_Suppliers);
}
private void refreshCombo(JComboBox<ComboItem> combo) {
combo.removeAllItems();
try {
combo.addItem(new ComboItem("0","ashjish"));
combo.addItem(new ComboItem("2","ashjish"));
combo.addItem(new ComboItem("3","ashjish"));
} catch (Exception e) {
//log.logToFile("refreshCombo: " + e.getClass().getName() + ": " + e.getMessage(), 1);
e.printStackTrace();
}
}
private JTable createTable() {
String[] columnNames = "Name 1,Name 2,Name 3,Name 4,Name 5".split(",");
int rows = 30;
int cols = columnNames.length;
String[][] data = new String[rows][cols];
for(int i=0; i<rows; i++) {
for(int j=0; j<cols; j++) {
data[i][j] = "R"+i+" C"+j;
}
}
JTable table = new JTable(data, columnNames);
return table;
}
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
#Override
public void run() {
JFrame frame = new JFrame();
ProductPanel2 pane = new ProductPanel2();
frame.setContentPane(pane);
frame.setSize(1000,1000);
frame.setLocationRelativeTo(null);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}
});
}
}

i dont want space betweeb combo and jtable whuich in mention at screenshot
package test;
import java.awt.EventQueue;
import java.util.Arrays;
import javax.swing.DefaultListModel;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JList;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.SwingConstants;
import javax.swing.table.DefaultTableModel;
import net.miginfocom.swing.MigLayout;
public class ProductPanel2 extends JPanel {
private JLabel lblProd;
private JButton butAdd;
private JButton butRemove;
private JButton butEdit;
private JScrollPane scroll;
private JTable table;
private static final long serialVersionUID = 1L;
public JList<String> lst_Options;
private JScrollPane scr_Data;
private JComboBox<ComboItem> cmb_Suppliers;
//Generar de inmediato
private JButton btn_NewUpdate;
private JButton btn_Delete;
private JButton btn_Copy;
private JTable tbl_Settings;
private JLabel lbl_SelectedOption;
private JPanel filterPanel;
private JLabel lbl_cmb_supplier;
private JButton btn_search;
public ProductPanel2() {
initComponents();
}
private void initComponents() {
lblProd = new JLabel("Product List: ");
lbl_cmb_supplier = new JLabel("Proveedor");
btn_NewUpdate = new JButton("Add");
btn_Delete = new JButton("Remove");
lbl_SelectedOption = new JLabel("Tipo de datos");
JLabel lbl_Opciones = new JLabel("Opciones");
cmb_Suppliers = new JComboBox<ComboItem>();
btn_Delete = new JButton("Eliminar");
btn_search = new JButton("Search");
btn_NewUpdate = new JButton("Nuevo");
scr_Data = new JScrollPane();
JComboBox<String> cmb_Suppliers = new JComboBox<String>();
JButton btn_New = new JButton("Nuevo");
JButton btn_Delete = new JButton("Cancelar");
JButton btn_PDF = new JButton("Crea PDF");
JButton btn_Send = new JButton("Envia por correo");
tbl_Settings = createTable();
tbl_Settings.setFillsViewportHeight(true);
scr_Data = new JScrollPane(tbl_Settings);
tbl_Settings.setPreferredScrollableViewportSize(tbl_Settings.getPreferredSize());
filterPanel = new JPanel();
/*setLayout(new MigLayout("","[right]"));
add(lbl_Opciones, "growx,aligny, top, wrap");
filterPanel.add(lbl_cmb_supplier, "split 2, wrap");
filterPanel.add(cmb_Suppliers, "wrap");
filterPanel.add(btn_search, "grow, spany, wrap");
add(filterPanel, "growx 5,split 2, flowy, top, sgx");
add(scr_Data, "width 100%, growx, push, span, wrap");
scr_Data.setViewportView(tbl_Settings);
lbl_Opciones.setHorizontalAlignment(SwingConstants.CENTER);*/
setLayout(new MigLayout("debug", "[122px][129px][23px][45px][148px,grow]", "[][100px,grow][]"));
add(lbl_Opciones, "growx, wrap");
filterPanel.add(lbl_cmb_supplier);
filterPanel.add(cmb_Suppliers);
filterPanel.add(btn_search, "grow, spany, wrap");
add(filterPanel, "wrap");
add(scr_Data, "width 100%, growx, push, span, wrap");
add(btn_New);
add(btn_PDF);
add(btn_Send);
add(btn_Delete);
refreshCombo(cmb_Suppliers);
}
private void refreshCombo(JComboBox<String> combo) {
combo.removeAllItems();
try {
} catch (Exception e) {
//log.logToFile("refreshCombo: " + e.getClass().getName() + ": " + e.getMessage(), 1);
e.printStackTrace();
}
}
private JTable createTable() {
String[] columnNames = "Name 1,Name 2,Name 3,Name 4,Name 5".split(",");
int rows = 30;
int cols = columnNames.length;
String[][] data = new String[rows][cols];
for(int i=0; i<rows; i++) {
for(int j=0; j<cols; j++) {
data[i][j] = "R"+i+" C"+j;
}
}
JTable table = new JTable(data, columnNames);
return table;
}
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
#Override
public void run() {
JFrame frame = new JFrame();
ProductPanel2 pane = new ProductPanel2();
frame.setContentPane(pane);
frame.setSize(1000,1000);
frame.setLocationRelativeTo(null);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}
});
}
}

You should re-think, how you are using the MigLayout! Please consider reading the quickstart guide: http://www.miglayout.com/QuickStart.pdf
Also your variable naming needs some work, it is very unclear, which variable is for what.
In order to solve your problem, do this:
tbl_Settings = createTable();
tbl_Settings.setFillsViewportHeight(true);
scr_Data = new JScrollPane(tbl_Settings);
// I have created a new Dimension-object. Those dimensions are FIXED! You might want to put a new dimension in, that is relative to the window size.
scr_Data.setPreferredSize(new Dimension(800, 800));
JPanel filterPanel=new JPanel();
Change this line (where you are setting absolute widths and heights for rows and columns!):
setLayout(new MigLayout("debug", "[96px][][94.00][grow][149.00px][2px][161px]", "[16px][240px,grow][12px][29px]"));
To this:
setLayout(new MigLayout());
Remove all the cells you have added, because you have mixed them with other layout-parts, that are not cells:
add(lst_Options, "grow");
filterPanel.add(scr_Data,"wrap");
// filterPanel.add(cmb_Suppliers, "");
add(filterPanel,"width 100%, growx, push, span, wrap");
scr_Data.setViewportView(tbl_Settings);
lbl_Opciones.setHorizontalAlignment(SwingConstants.CENTER);
add(lbl_Opciones, "growx,aligny top");
add(btn_Delete, "alignx right,aligny bottom");
add(btn_NewUpdate, "alignx right,aligny bottom");
Looks like this:
PS: I did not know that this would work:
String[] columnNames = "Name 1,Name 2,Name 3,Name 4,Name 5".split(",");
The usual way is:
String[] columnNames = {"Name 1","Name 2","Name 3","Name 4","Name 5"};
I've learned something!
EDIT:
I've learned, that split() works by using regular expression, so you have to be careful, how to use it!
This will return an empty field and NOT "aaa" and "bbb":
"aaa.bbb".split(".");
Update:
I have updated my answer, this is the code in the initComponents()-method. I again urge you to read more about the MigLayout and stop mixing cell-components like this add(lst_Options, "cell 0 1,grow"); with non-cell components. This is messy and hard to understand / fix. I removed those cells in my answer and added alignments for the buttons. Now everything works as expected.
private void initComponents() {
lblProd = new JLabel("Product List: ");
btn_NewUpdate = new JButton("Add");
btn_Delete = new JButton("Remove");
lbl_SelectedOption = new JLabel("Tipo de datos");
JLabel lbl_Opciones = new JLabel("Opciones");
lst_Options = new JList<String>();
modeloOpciones = new DefaultListModel<String>();
btn_Delete = new JButton("Eliminar");
btn_NewUpdate = new JButton("Nuevo");
scr_Data = new JScrollPane();
cmb_Suppliers = new JComboBox<String>();
modeloOpciones.addElement("Proveedores");
modeloOpciones.addElement("Productos");
modeloOpciones.addElement("Partidas");
lst_Options.setModel(modeloOpciones);
tbl_Settings = createTable();
tbl_Settings.setFillsViewportHeight(true);
scr_Data = new JScrollPane(tbl_Settings);
tbl_Settings.setPreferredScrollableViewportSize(tbl_Settings.getPreferredSize());
setLayout(new MigLayout("","[right]"));
add(lbl_Opciones, "growx,aligny, top, wrap");
add(lst_Options, "grow");
add(scr_Data, "width 100%, growx, push, span, wrap");
scr_Data.setViewportView(tbl_Settings);
lbl_Opciones.setHorizontalAlignment(SwingConstants.CENTER);
btn_Delete.setHorizontalAlignment(SwingConstants.RIGHT);
btn_NewUpdate.setHorizontalAlignment(SwingConstants.RIGHT);
add(btn_Delete, "bottom, span 2");
add(btn_NewUpdate, "bottom");
refreshCombo(cmb_Suppliers);
}
Looks like this:

java.lang.illegalargumentexception adding a window to a container

I keep receiving this error
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.util.*;
import javax.swing.table.*;
import java.awt.Container.*;
public class main extends JFrame implements ActionListener
{
JButton CustomerOrder;
JButton SoftwareProducts;
JButton BooksProducts;
JButton AddBooks;
JButton StaffMember;
JButton LoginView;
static ArrayList<Software> softwareList = new ArrayList<Software>();
CardLayout c1 = new CardLayout();
JPanel mainPanel;
SoftwareProducts addsoftware;
CustomerOrder customerorder;
BooksProducts addProduct;
AddBooks addBook;
SoftwareProducts sf = new SoftwareProducts();
//Press submit;
public static void main(String[] args)
{
new main();
JFrame frame = new JFrame("Selling Product");
frame.setLocationRelativeTo(null);
//frame.getContentPane().add(main, BorderLayout.CENTER);
//new CustomerOrder();
//EmailFrame email=new EmailFrame();
//CustomerOrder co = new CustomerOrder();
//LoginView login = new LoginView();
}
public main(){
super();
// getContentPane().setBackground(Color.green);
setSize(700,800);
setLayout(new FlowLayout());
/*CardLayout cardLayout = (CardLayout) mainPanel.getLayout();
cardLayout.show(mainPanel, "softwareProducts");
*/
//CustomerOrder co = new CustomerOrder();
//add(co);
SoftwareProducts = new JButton("SoftwareProducts");
SoftwareProducts.setSize(150,40);
SoftwareProducts.setLocation(20,50);
CustomerOrder = new JButton("CustomerOrder");
CustomerOrder.setSize(160,40);
CustomerOrder.setLocation(150,50);
BooksProducts = new JButton("BooksProducts");
BooksProducts.setSize(200,40);
BooksProducts.setLocation(310,50);
AddBooks = new JButton("AddBook");
AddBooks.setSize(200,40);
AddBooks.setLocation(310,50);
StaffMember = new JButton("StaffMember");
StaffMember.setSize(200,40);
StaffMember.setLocation(310,50);
LoginView = new JButton("LoginView");
LoginView.setSize(150,40);
LoginView.setLocation(20,50);
SoftwareProducts.addActionListener(this);
add(SoftwareProducts);
CustomerOrder.addActionListener(this);
add(CustomerOrder);
BooksProducts.addActionListener(this);
add(BooksProducts);
AddBooks.addActionListener(this);
add(AddBooks);
StaffMember.addActionListener(this);
add(StaffMember);
mainPanel = new JPanel();
mainPanel.setBackground(Color.BLUE);
mainPanel.setPreferredSize(new Dimension(600,500));
mainPanel.setLayout(c1);
addsoftware = new SoftwareProducts();
mainPanel.add(addsoftware,"addsoftware");
customerorder = new CustomerOrder(); ////// I am getting the error
from this part of code
mainPanel.add(customerorder,"customerorder");///// I am getting the
error from this part of code
addProduct = new BooksProducts();
mainPanel.add(addProduct,"addProduct");
addBook = new AddBooks();
mainPanel.add(addBook,"addBook");
/* mainPanel.add(SoftwareProducts);
mainPanel = new JPanel(new CardLayout());
mainPanel.add(SoftwareProducts);
getContentPane().add(mainPanel);
addProduct = new BooksProducts();
mainPanel.add(addProduct,"addProduct");
*/
add(mainPanel);
setVisible(true);
}
public void actionPerformed(ActionEvent e)
{
if(e.getSource() == SoftwareProducts)
{
c1.show(mainPanel,"addsoftware");
this.setTitle("SoftwareProducts");
//System.out.println("Softwares");
}
if(e.getSource() == CustomerOrder)
{
c1.show(mainPanel,"customerorder");
this.setTitle("CustomerOrder");
//System.out.println("Custmers");
}
if(e.getSource() == BooksProducts)
{
c1.show(mainPanel,"addProduct");
this.setTitle("BooksProducts");
}
if(e.getSource() == AddBooks)
{
c1.show(mainPanel,"addBook");
this.setTitle("AddBooks");
}
if(e.getSource() == LoginView)
{
c1.show(mainPanel,"LogIN");
this.setTitle("LOGIN");
}
}
/* public void actionPerformed(ActionEvent e)
{
if(e.getSource() == press)
{
System.out.println("addProducts");
}
}*/
}
and my customerOrder class
import javax.swing.*;
import javax.swing.table.*;
import java.awt.*;
import java.awt.event.*;
import java.util.Arrays;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.*;
import java.io.*;
public class CustomerOrder extends JFrame
implements ActionListener
{
//JButton asd = new JButton("BUTTON");
//JTextField productID;
//JTextField productName;
//JTextField productCost;
//JTextField productPYear;
//JTextField productPHouse;
JButton showOrder;
DefaultListModel<String> model = new DefaultListModel<>();
JList <String>orderList = new JList(model);
JTable softwareTabel = new JTable();
//DefaultTableModel tableModel = new DefaultTableModel(0, 1);
public CustomerOrder()
{
//super();
// JLabel toLabel=new JLabel("Product ID: ");
//JTextField to=new JTextField();
setLayout(new FlowLayout());
/*
productName = new JTextField(12);
add(productName);
productCost = new JTextField(12);
add(productCost);
productPYear = new JTextField(12);
add(productPYear);
productPHouse = new JTextField(12);
add(productPHouse);
*/
showOrder = new JButton("SHOW ORDER");
showOrder.setSize(25,40);
showOrder.addActionListener(this);
add(showOrder);
}
public void actionPerformed(ActionEvent e)
{
//Object[] colNames={"Product ID","Processor","RAm"};
if(e.getSource() == showOrder)
{
model.removeAllElements();
/* GridLayout exLayout = new GridLayout(3, 3);
JLabel ram,processor;
ram = new JLabel("RAM");
processor = new JLabel("Processor");
String softwaredata[] = {"ID","RAM","Processor","Product ID","Product Name","Product Year","Product Year","Product PublishHouse"};
JPanel panel = new JPanel();
panel.setLayout(new GridLayout(8, 3));
add(ram);
add(processor);
JTable table = new JTable();*/
//DeafultTableModel dm = new DeafultTableModel(0,0);
//String header[] = new String[] {"RAM", "Processor","ProductID","Product Name","Product Year","Product Publish House"};
//dm.setColumnIdentifiers(header);
//Object[][] software = new Object[8][3];
//model.addRow(orderList.toArray());
int x = 0;
while (x < main.softwareList.size())
{
//./model.addElement(main.softwareList.get(x).getproductYear());
model.addElement(""+main.softwareList.get(x).getproductID());
model.addElement(""+main.softwareList.get(x).getRam());
model.addElement(""+ main.softwareList.get(x).getProcessor());
model.addElement(""+ main.softwareList.get(x).getproductID());
model.addElement(main.softwareList.get(x).getproductName());
model.addElement(""+ main.softwareList.get(x).getproductYear());
model.addElement(main.softwareList.get(x).getproductPublishHouse());
//model.addElement(main.softwareList.get(x).getproductID());*/
x++;
//System.out.println("as");
}
/* ArrayList<String> table1 = new ArrayList();
ArrayList<ArrayList<String>> table2 = new ArrayList();
table1.add("Product ID");
table1.add("RAM");
table1.add("Processor");
table1.add("Product Name");
table1.add("Product Year");
table1.add("Product PHouse");
Object[] software = table1.toArray();
String[] [] softwarest = new String[table1.size()][];
int i = 0;
for (List<String> next : table2){
softwarest[i++] = next.toArray(new String[next.size()]);
}
JTable newTable = new JTable(softwarest,software);
JFrame frame = new JFrame();
frame.getContentPane().add(new JScrollPane(newTable));
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
*/
//table.add(model);
// add(orderList);
//Object[] column = {"RAM:", "Processor:"};
//Object[][] data = {{"RAM:", "Processor:"}};
//JTable table = new JTable();
//table.setShowGrid(false);
//table.setTableHeader(null);
}
}
}
When i run this code i get the following exception from the main class in customerorder = new CustomerOrder;
mainPanel.add(customerorder,"customerorder")

customorder is an instance of CustomerOrder, which extends from JFrame; public class CustomerOrder extends JFrame
As the error states illegalargumentexception adding a window to a container; it is illegal to add a window to another window, it simply doesn't make sense.
This is one of the reasons we discourage extending from top level containers like JFrame directly.
Either make the CustomerOrder visible like any normal frame (although that might lead you into other issues) or better yet, base your CustomerOrder component of a JPanel
public class CustomerOrder extends JPanel {
//...
}
This way you can add it to what ever container you need to.

Idk if this logic is correct, but in just playing around to try and figure out the reason it doesn't make sense for myself I concluded that:
extending JFrame causes only one object to be created and why it tries to add the JFrame frame; object to itself which causes the exception...
extending JPanel allows the JFrame frame; <-- object to divide into a Container & a Component which allows you to
frame.add(this) ..
frame.add(this) is the component invoked by JPanel method .add()
if this is wrong plz correct..

JButton + radiobox + checkbox

I'd like this program I have to have some kind of "sum" button which will add in the column "Description" summarised information about the movie. Lets say I have "die hard" as a title, age 7 from radiobutton, and horror selected from the checkbox. Pressin the button would put "Die hard, 7, horror" under the column. I have no idea how to aproach this case.
package naplety.Swing;
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.BorderFactory;
import javax.swing.ButtonGroup;
import javax.swing.DefaultListModel;
import javax.swing.JButton;
import javax.swing.JCheckBoxMenuItem;
import javax.swing.JFrame;
import javax.swing.JList;
import javax.swing.JPanel;
import javax.swing.JRadioButton;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.JTextField;
import javax.swing.ListModel;
import javax.swing.SwingUtilities;
import javax.swing.table.DefaultTableModel;
import javax.swing.JCheckBox;
public class SamodzielnaListaOsob extends JFrame implements ActionListener {
JButton dodaj, erease;
JTextField film;
DefaultListModel<String> listFilm;
DefaultTableModel tableFilm;
public SamodzielnaListaOsob(String title) {
super(title);
setDefaultCloseOperation(EXIT_ON_CLOSE);
final JTextField film = new JTextField("Wpisz tytul filmu", 10);
film.setBorder(BorderFactory.createTitledBorder("Film"));
JPanel p1 = new JPanel();
p1.add(film);
JButton dodaj = new JButton("Add to list");
dodaj.addActionListener(new ActionListener() {
#Override
public void actionPerformed(ActionEvent e) {
String nowyFilm = film.getText();
if (nowyFilm != "") {
listFilm.addElement(nowyFilm);
film.setText("");
}
}
});
JButton erease = new JButton("Clear");
erease.addActionListener(new ActionListener() {
#Override
public void actionPerformed(ActionEvent e) {
film.setText("");
}
});
JButton dodajDoTabeli = new JButton("Add to table");
dodajDoTabeli.addActionListener(new ActionListener() {
#Override
public void actionPerformed(ActionEvent e) {
String nowyFilm = film.getText();
if (nowyFilm != "") {
int ile = tableFilm.getRowCount();
tableFilm.addRow(new Object[] { ile + 1, nowyFilm });
}
}
});
JRadioButton sevenbutton = new JRadioButton("7");
JRadioButton twbutton = new JRadioButton("12");
JRadioButton sixbutton = new JRadioButton("16");
JRadioButton eightbutton = new JRadioButton("18");
ButtonGroup bg1 = new ButtonGroup();
bg1.add(sevenbutton);
bg1.add(twbutton);
bg1.add(sixbutton);
bg1.add(eightbutton);
JPanel radioPanel = new JPanel();
radioPanel.setLayout(new GridLayout(4, 0));
radioPanel.add(sevenbutton);
radioPanel.add(twbutton);
radioPanel.add(sixbutton);
radioPanel.add(eightbutton);
radioPanel.setBorder(BorderFactory.createTitledBorder(
BorderFactory.createEtchedBorder(), "Age"));
radioPanel.setSize(200, 200);
JCheckBox Horror = new JCheckBox("Horror");
JCheckBox Komedia = new JCheckBox("Comedy");
JCheckBox Thriller = new JCheckBox("Thriller");
JCheckBoxMenuItem listac = new JCheckBoxMenuItem();
listac.add(Horror);
listac.add(Komedia);
listac.add(Thriller);
JPanel listaChceck = new JPanel();
listaChceck.add(Horror);
listaChceck.add(Komedia);
listaChceck.add(Thriller);
listaChceck.setLayout(new GridLayout(3, 0));
JPanel p2 = new JPanel();
p2.add(dodaj);
p2.add(erease);
p2.add(dodajDoTabeli);
p2.add(radioPanel);
p2.add(listaChceck);
listFilm = new DefaultListModel<String>();
listFilm.addElement("Achacy");
listFilm.addElement("Bonifacy");
listFilm.addElement("Cezary");
JList<String> lista = new JList<String>(listFilm);
JScrollPane sl = new JScrollPane(lista);
sl.setPreferredSize(new Dimension(150, 150));
sl.setBorder(BorderFactory.createTitledBorder("List"));
String[] kolumnyTabeli = { "Nr", "Movie", "Description" };
tableFilm = new DefaultTableModel(kolumnyTabeli, 0) {
};
JTable tabela = new JTable(tableFilm);
JScrollPane st = new JScrollPane(tabela);
st.setPreferredSize(new Dimension(300, 150));
st.setBorder(BorderFactory.createTitledBorder("Table"));
JPanel p3 = new JPanel();
p3.add(sl);
p3.add(st);
setPreferredSize(new Dimension(900, 900));
setVisible(true);
p1.add(p2);
p2.add(p3);
setContentPane(p1);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
new SamodzielnaListaOsob("List of movies");
}
});
}
}

You need to declare your variables either before you try to access them, or declare them global, which I did. I prefer this way.
Use .pack() on your frame to when you start the program, something actually shows.
Learn to use LayoutManagers for a better look.
Use arrays of RadioButtons and CheckBoxes so its easier to loop through them. I has to manually write a bunch of if statements, which would not be necessary if I could loop through them.
To get is a RadioButton or CheckBox is selected, use .isSelected()
.setVisible(true) after you add all your components.
Here's is your refactored code. I did nothing else to it, but fix the issue posted in your question. It now adds the info the desciption, when you hit the Add Film button.
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.*;
import javax.swing.table.DefaultTableModel;
public class SamodzielnaListaOsob extends JFrame {
JButton dodaj, erease;
JTextField film;
DefaultListModel<String> listFilm;
DefaultTableModel tableFilm;
JList<String> lista = null;
JRadioButton sevenbutton = new JRadioButton("7");
JRadioButton twbutton = new JRadioButton("12");
JRadioButton sixbutton = new JRadioButton("16");
JRadioButton eightbutton = new JRadioButton("18");
JCheckBox Horror = new JCheckBox("Horror");
JCheckBox Komedia = new JCheckBox("Comedy");
JCheckBox Thriller = new JCheckBox("Thriller");
ButtonGroup bg1 = new ButtonGroup();
public SamodzielnaListaOsob(String title) {
super(title);
setDefaultCloseOperation(EXIT_ON_CLOSE);
final JTextField film = new JTextField("Wpisz tytul filmu", 10);
film.setBorder(BorderFactory.createTitledBorder("Film"));
JPanel p1 = new JPanel();
p1.add(film);
JButton dodaj = new JButton("Add to list");
dodaj.addActionListener(new ActionListener() {
#Override
public void actionPerformed(ActionEvent e) {
String nowyFilm = film.getText();
if (nowyFilm != "") {
listFilm.addElement(nowyFilm);
film.setText("");
}
}
});
JButton erease = new JButton("Clear");
erease.addActionListener(new ActionListener() {
#Override
public void actionPerformed(ActionEvent e) {
film.setText("");
}
});
JButton dodajDoTabeli = new JButton("Add to table");
dodajDoTabeli.addActionListener(new ActionListener() {
#Override
public void actionPerformed(ActionEvent e) {
String nowyFilm = film.getText();
if (nowyFilm != "") {
int ile = tableFilm.getRowCount();
String title = lista.getSelectedValue();
int age;
if (sixbutton.isSelected()) {
age = 16;
} else if (sevenbutton.isSelected()) {
age = 7;
} else if (eightbutton.isSelected()) {
age = 18;
} else {
age = 12;
}
String genres = "";
if (Horror.isSelected()) {
genres += "Horror, ";
}
if (Komedia.isSelected()) {
genres += "Komedia, ";
}
if (Thriller.isSelected()) {
genres += "Thriller";
}
String desc = title + ", " + age + ", " + genres;
tableFilm.addRow(new Object[]{ile + 1, nowyFilm, desc});
}
}
});
bg1.add(sevenbutton);
bg1.add(twbutton);
bg1.add(sixbutton);
bg1.add(eightbutton);
JPanel radioPanel = new JPanel();
radioPanel.setLayout(new GridLayout(4, 0));
radioPanel.add(sevenbutton);
radioPanel.add(twbutton);
radioPanel.add(sixbutton);
radioPanel.add(eightbutton);
radioPanel.setBorder(BorderFactory.createTitledBorder(
BorderFactory.createEtchedBorder(), "Age"));
radioPanel.setSize(200, 200);
JCheckBoxMenuItem listac = new JCheckBoxMenuItem();
listac.add(Horror);
listac.add(Komedia);
listac.add(Thriller);
JPanel listaChceck = new JPanel();
listaChceck.add(Horror);
listaChceck.add(Komedia);
listaChceck.add(Thriller);
listaChceck.setLayout(new GridLayout(3, 0));
JPanel p2 = new JPanel();
p2.add(dodaj);
p2.add(erease);
p2.add(dodajDoTabeli);
p2.add(radioPanel);
p2.add(listaChceck);
listFilm = new DefaultListModel<String>();
listFilm.addElement("Achacy");
listFilm.addElement("Bonifacy");
listFilm.addElement("Cezary");
lista = new JList<String>(listFilm);
JScrollPane sl = new JScrollPane(lista);
sl.setPreferredSize(new Dimension(150, 150));
sl.setBorder(BorderFactory.createTitledBorder("List"));
String[] kolumnyTabeli = {"Nr", "Movie", "Description"};
tableFilm = new DefaultTableModel(kolumnyTabeli, 0) {
};
JTable tabela = new JTable(tableFilm);
JScrollPane st = new JScrollPane(tabela);
st.setPreferredSize(new Dimension(300, 150));
st.setBorder(BorderFactory.createTitledBorder("Table"));
JPanel p3 = new JPanel();
p3.add(sl);
p3.add(st);
p1.add(p2);
p2.add(p3);
setContentPane(p1);
pack();
setPreferredSize(new Dimension(900, 900));
setVisible(true);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
new SamodzielnaListaOsob("List of movies");
}
});
}
}

Radio buttons and Check Buttons don't work like textfields. In a textfield, the useful values are picked up from the "text" member (example: getText()). A radioButton instead defines a set of fixed choices (well, you can make them dynamic, but it doesn't worth it, there are better components for that kind of work) like "yes" and "no". Usually, when you pickup some rabiobutton, you use the isChecked() method (returns boolean, it may be isChecked(), I don't remember) to react in one way or another. Example:
String age = 0;
if(sevenbutton.isSelected()){
age = 7;
}
Nonetheless, I think you can get the value from the text in the sevenbutton using getText(), but you're gonna need to check which radiobutton is checked anyway. A checkButton works in a pretty similar way, but for non-exclusive choices, so you need to use the isSelected() method, or similar, anyway.
Your method should look like:
private void addMovie(){
String age = "0";
String gender = "";
//Evaluate radioButtons
if(sevenbutton.isSelected()){
age = 7;
}
//Evaluate checkbuttons
if(Horror.isSelected()){
gender = gender+" horror";
}
String movie = film+" "+age+" "+gender;
//do anything else
}

How do I get the JLabel to show which button has been selected

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.*;
import java.awt.*;
public class filecabinet extends JFrame implements ActionListener {
private String folder = "";
//create buttons
private JButton a = new JButton("A");
private JButton b = new JButton("B");
private JButton c = new JButton("C");
private JButton d = new JButton("D");
private JButton e = new JButton("E");
private JButton f = new JButton("F");
private JButton g = new JButton("G");
private JButton h = new JButton("H");
private JButton i = new JButton("I");
private JButton j = new JButton("J");
private JButton k = new JButton("K");
private JButton l = new JButton("L");
private JButton m = new JButton("M");
private JButton n = new JButton("N");
private JButton o = new JButton("O");
private JButton p = new JButton("P");
private JButton q = new JButton("Q");
private JButton r = new JButton("R");
private JButton s = new JButton("S");
private JButton t = new JButton("T");
private JButton u = new JButton("U");
private JButton v = new JButton("V");
private JButton w = new JButton("W");
private JButton x = new JButton("X");
private JButton y = new JButton("Y");
private JButton z = new JButton("Z");
//create panels
private JPanel aF = new JPanel();
private JPanel gL = new JPanel();
private JPanel mR = new JPanel();
private JPanel sX = new JPanel();
private JPanel yZ = new JPanel();
private JPanel readout = new JPanel();
private JLabel notify = new JLabel("You have selected folder " + folder);
public void ComposePane(){
//set buttons to panels
aF.add(a);
aF.add(b);
aF.add(c);
aF.add(d);
aF.add(e);
aF.add(f);
//set layout of panels
aF.setLayout(new GridLayout(2,3));
gL.add(g);
gL.add(h);
gL.add(i);
gL.add(j);
gL.add(k);
gL.add(l);
gL.setLayout(new GridLayout(2,3));
mR.add(m);
mR.add(n);
mR.add(o);
mR.add(p);
mR.add(q);
mR.add(r);
mR.setLayout(new GridLayout(2,3));
sX.add(s);
sX.add(t);
sX.add(u);
sX.add(v);
sX.add(w);
sX.add(x);
sX.setLayout(new GridLayout(2,3));
yZ.add(y);
yZ.add(z);
yZ.add(readout);
readout.add(notify);
yZ.setLayout(new GridLayout(2,3));
}
public filecabinet(){
setTitle("File Cabinet");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setLayout(new GridLayout(5,1));
ComposePane();
add(aF);
add(gL);
add(mR);
add(sX);
add(yZ);
addActionListener();
}
public void actionPerformed(ActionEvent e) {
folder = ((JButton) e.getSource()).getText();
}
public void addActionListener(){
a.addActionListener(this);
b.addActionListener(this);
c.addActionListener(this);
d.addActionListener(this);
e.addActionListener(this);
f.addActionListener(this);
g.addActionListener(this);
h.addActionListener(this);
i.addActionListener(this);
j.addActionListener(this);
k.addActionListener(this);
l.addActionListener(this);
m.addActionListener(this);
n.addActionListener(this);
o.addActionListener(this);
p.addActionListener(this);
q.addActionListener(this);
r.addActionListener(this);
s.addActionListener(this);
t.addActionListener(this);
u.addActionListener(this);
v.addActionListener(this);
w.addActionListener(this);
x.addActionListener(this);
y.addActionListener(this);
z.addActionListener(this);
}
public static void main(String[]args){
filecabinet frame = new filecabinet();
final int WIDTH = 600;
final int HEIGHT = 600;
frame.setSize(WIDTH, HEIGHT);
frame.setVisible(true);
}
}
I would prefer not to have to write out a listener for every button
and I was wandering if I could just get the text contained in the button.
such as "You have selected foler X", X is the button chosen.

Again, either use arrays and/or a for loop to consolidate your code getting rid of code redundancy. For example:
import java.awt.BorderLayout;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.*;
#SuppressWarnings("serial")
public class FileCabinet2 extends JPanel {
public static final char FIRST_LETTER = 'A';
public static final char LAST_LETTER = 'Z';
private static final float lARGE_FONT_POINTS = 32f;
private static final int GRID_COLS = 3;
private JLabel chosenLabel = new JLabel();
public FileCabinet2() {
JPanel letterPanel = new JPanel(new GridLayout(0, GRID_COLS));
ActionListener btnListener = new ActionListener() {
#Override
public void actionPerformed(ActionEvent evt) {
chosenLabel.setText(evt.getActionCommand());
}
};
for (char c = FIRST_LETTER; c <= LAST_LETTER; c++) {
String buttonTitle = String.valueOf(c);
JButton button = new JButton(buttonTitle);
setFontPoints(button, lARGE_FONT_POINTS);
letterPanel.add(button);
button.addActionListener(btnListener);
}
JLabel selectionLabel = new JLabel("Selection: ", SwingConstants.RIGHT);
setFontPoints(selectionLabel, lARGE_FONT_POINTS);
setFontPoints(chosenLabel, lARGE_FONT_POINTS);
JPanel bottomPanel = new JPanel(new GridLayout(1, 0));
bottomPanel.add(selectionLabel);
bottomPanel.add(chosenLabel);
bottomPanel.setBorder(BorderFactory.createEtchedBorder());
setLayout(new BorderLayout());
add(letterPanel, BorderLayout.CENTER);
add(bottomPanel, BorderLayout.PAGE_END);
}
private void setFontPoints(JComponent jComp, float points) {
jComp.setFont(jComp.getFont().deriveFont(points));
}
private static void createAndShowGui() {
FileCabinet2 mainPanel = new FileCabinet2();
JFrame frame = new JFrame("File Cabinet");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.getContentPane().add(mainPanel);
frame.pack();
frame.setLocationByPlatform(true);
frame.setVisible(true);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
createAndShowGui();
}
});
}
}
Now if you want to change how many button columns there are, all you need to do is change one constant, GRID_COLS, and the same for the size of the font, just change LARGE_FONT_POINTS.

For this:
would prefer not to have to write out a listener for every button
Create a method that accept the JPanel as the parameter and then iterate to each component in JPanel, add the action listener if the component is JButton
This one:
I was wandering if I could just get the text contained in the button.
Just set the value in the JLabel. You already get the button content right?
So, the full code is:
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.*;
import java.awt.*;
public class filecabinet extends JFrame implements ActionListener {
private String folder = "";
// create buttons
private JButton a = new JButton("A");
private JButton b = new JButton("B");
private JButton c = new JButton("C");
private JButton d = new JButton("D");
private JButton e = new JButton("E");
private JButton f = new JButton("F");
private JButton g = new JButton("G");
private JButton h = new JButton("H");
private JButton i = new JButton("I");
private JButton j = new JButton("J");
private JButton k = new JButton("K");
private JButton l = new JButton("L");
private JButton m = new JButton("M");
private JButton n = new JButton("N");
private JButton o = new JButton("O");
private JButton p = new JButton("P");
private JButton q = new JButton("Q");
private JButton r = new JButton("R");
private JButton s = new JButton("S");
private JButton t = new JButton("T");
private JButton u = new JButton("U");
private JButton v = new JButton("V");
private JButton w = new JButton("W");
private JButton x = new JButton("X");
private JButton y = new JButton("Y");
private JButton z = new JButton("Z");
// create panels
private JPanel aF = new JPanel();
private JPanel gL = new JPanel();
private JPanel mR = new JPanel();
private JPanel sX = new JPanel();
private JPanel yZ = new JPanel();
private JPanel readout = new JPanel();
private JLabel notify = new JLabel("You have selected folder " + folder);
public void ComposePane() {
// set buttons to panels
aF.add(a);
aF.add(b);
aF.add(c);
aF.add(d);
aF.add(e);
aF.add(f);
// set layout of panels
aF.setLayout(new GridLayout(2, 3));
gL.add(g);
gL.add(h);
gL.add(i);
gL.add(j);
gL.add(k);
gL.add(l);
gL.setLayout(new GridLayout(2, 3));
mR.add(m);
mR.add(n);
mR.add(o);
mR.add(p);
mR.add(q);
mR.add(r);
mR.setLayout(new GridLayout(2, 3));
sX.add(s);
sX.add(t);
sX.add(u);
sX.add(v);
sX.add(w);
sX.add(x);
sX.setLayout(new GridLayout(2, 3));
yZ.add(y);
yZ.add(z);
yZ.add(readout);
readout.add(notify);
yZ.setLayout(new GridLayout(2, 3));
}
public filecabinet() {
setTitle("File Cabinet");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setLayout(new GridLayout(5, 1));
ComposePane();
add(aF);
add(gL);
add(mR);
add(sX);
add(yZ);
addActionListener(aF);
addActionListener(gL);
addActionListener(mR);
addActionListener(sX);
addActionListener(yZ);
}
public void actionPerformed(ActionEvent e) {
folder = ((JButton) e.getSource()).getText();
// set the label with folder value
notify.setText("You have selected folder " + folder);
}
// Attach event handler to each JButton in JPanel
public void addActionListener(JPanel panel) {
Component[] components = panel.getComponents();
for (Component component : components) {
if (component instanceof JButton) {
((JButton) component).addActionListener(this);
}
}
}
public static void main(String[] args) {
filecabinet frame = new filecabinet();
final int WIDTH = 600;
final int HEIGHT = 600;
frame.setSize(WIDTH, HEIGHT);
frame.setVisible(true);
}
}

A quick review of your code, brought your code down to this length.
Imagine, what you can achieve if you give it a bit more insight.
Furthermore, when you see that in your code, you are repeating some
lines again and again for the same thingy, you can indeed think of a
pattern that can accomplish that for you in a rightful manner, with
fewer keystrokes.
Try this modified code of yours :-)
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.*;
import java.awt.*;
public class Filecabinet extends JFrame implements ActionListener {
private String folder = "";
//create buttons
private JButton[] button = new JButton[26];
//create panels
private JPanel aF = new JPanel();
private JPanel gL = new JPanel();
private JPanel mR = new JPanel();
private JPanel sX = new JPanel();
private JPanel yZ = new JPanel();
private JPanel readout = new JPanel();
private JLabel notify = new JLabel("You have selected folder " + folder);
public void ComposePane(){
init_Buttons(button);
//set buttons to panels
for (int i = 0; i < 6; i++)
aF.add(button[i]);
//set layout of panels
aF.setLayout(new GridLayout(2,3));
for (int i = 6; i < 12; i++)
gL.add(button[i]);
gL.setLayout(new GridLayout(2,3));
for (int i = 12; i < 18; i++)
mR.add(button[i]);
mR.setLayout(new GridLayout(2,3));
for (int i = 18; i < 24; i++)
sX.add(button[i]);
sX.setLayout(new GridLayout(2,3));
for (int i = 24; i < 26; i++)
yZ.add(button[i]);
yZ.add(readout);
readout.add(notify);
yZ.setLayout(new GridLayout(2,3));
}
private void init_Buttons(JButton[] button)
{
int value = 65;
for (int i = 0; i < button.length; i++)
{
button[i] = new JButton(Character.toString((char) value++));
button[i].addActionListener(this);
}
}
public Filecabinet(){
setTitle("File Cabinet");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setLayout(new GridLayout(5,1));
ComposePane();
add(aF);
add(gL);
add(mR);
add(sX);
add(yZ);
}
public void actionPerformed(ActionEvent e) {
folder = ((JButton) e.getSource()).getText();
notify.setText(folder);
}
public static void main(String[]args){
SwingUtilities.invokeLater(new Runnable()
{
#Override
public void run()
{
Filecabinet frame = new Filecabinet();
final int WIDTH = 600;
final int HEIGHT = 600;
//frame.setSize(WIDTH, HEIGHT);
frame.pack();
frame.setVisible(true);
}
});
}
}

You can subclass JButton and write a constructor for the subclass that takes in as a parameter a reference to the action listener, your JFrame.
For instance, your subclass could simply be:
public class YourButton extends JButton {
public YourButton(String title, ActionListener listener) {
super(title);
this.addActionListener(listener);
}
}
So instead of:
private JButton a = new JButton("A");
You would call:
private YourButton a = new YourButton("A", this);
Additionally, as others have suggested, your actionPerformed(ActionEvent e) method requires you to update your notify JLabel instance to reflect the selected button's title.
Hope that helps!

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