I'm doing coding for Food Ordering GUI. I would like to ask few questions. I would like to ask that how should I declare variable to hold value for tfPrice1, tfPrice2, tfPrice3? What should I do to make the "Place Order" button so that when it is pressed it will sum up the values contained in the JTextFields? Below is my code.
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class FoodOrder1 extends JFrame
{
JButton riceBtn,noodleBtn,soupBtn;
JTextField display,total,tfPrice1,tfPrice2,tfPrice3;
JPanel mp,p1,p2,p3,p4,p5,p6,p7,p8;
JLabel dsp,ttl,rLbl,nLbl,sLbl,prc1,prc2,prc3;
int rice=3 , noodle=3 , soup=4;
int Total , price1=Integer.parseInt(tfPrice1), price2=Integer.parseInt(tfPrice2) , price3=Integer.parseInt(tfPrice3);
public FoodOrder1()
{
Container pane = getContentPane();
mp = new JPanel();
mp.setLayout(new GridLayout(14,1));
pane.add(mp);
p1 = new JPanel();
p1.setLayout(new GridLayout(1,1));
rLbl = new JLabel("Rice");
rLbl.setFont(new Font("Myraid Pro",Font.BOLD,14));
riceBtn = new JButton("Fried Rice " + "RM3");
p1.add(riceBtn);
riceBtn.addActionListener(new MyAction());
p1.add(rLbl);
p1.add(riceBtn);
p2 = new JPanel();
p2.setLayout(new GridLayout(1,2));
nLbl = new JLabel("Noodle");
nLbl.setFont(new Font("Myraid Pro",Font.BOLD,14));
noodleBtn = new JButton("Tomato Noodle " + "RM3");
noodleBtn.addActionListener(new MyAction());
p2.add(nLbl);
p2.add(noodleBtn);
p3 = new JPanel();
p3.setLayout(new GridLayout(1,2));
sLbl = new JLabel("Soup");
sLbl.setFont(new Font("Myraid Pro",Font.BOLD,14));
soupBtn = new JButton("Tomyam Soup " + "RM4");
soupBtn.addActionListener(new MyAction());
p3.add(sLbl);
p3.add(soupBtn);
p4 = new JPanel();
p4.setLayout(new GridLayout(1,2));
prc1 = new JLabel("Price of Fried Rice");
prc1.setFont(new Font("Myraid Pro",Font.BOLD,14));
tfPrice1 = new JTextField(10);
p4.add(prc1);
p4.add(tfPrice1);
tfPrice1.setEditable(false);
p5 = new JPanel();
p5.setLayout(new GridLayout(1,2));
prc2 = new JLabel("Price of Tomato Noodle");
prc2.setFont(new Font("Myraid Pro",Font.BOLD,14));
tfPrice2 = new JTextField(10);
p5.add(prc2);
p5.add(tfPrice2);
tfPrice2.setEditable(false);
p6 = new JPanel();
p6.setLayout(new GridLayout(1,2));
prc3 = new JLabel("Price of Tomyam Soup");
prc3.setFont(new Font("Myraid Pro",Font.BOLD,14));
tfPrice3 = new JTextField(10);
p6.add(prc3);
p6.add(tfPrice3);
tfPrice3.setEditable(false);
p7 = new JPanel();
p7.setLayout(new FlowLayout());
poBtn = new JButton("Place Order");
poBtn.setFont(new Font("Myraid Pro",Font.PLAIN,14));
poBtn.addActionListener(new MyAction2());
rstBtn = new JButton("Reset");
rstBtn.setFont(new Font("Myraid Pro",Font.PLAIN,14));
rstBtn.addActionListener(new MyAction3());
p7.add(poBtn);
p7.add(rstBtn);
p8 = new JPanel();
p8.setLayout(new GridLayout(1,2));
ttl = new JLabel("Total (RM)");
ttl.setFont(new Font("Myraid Pro",Font.BOLD,14));
total = new JTextField(10);
p8.add(ttl);
p8.add(total);
total.setEditable(false);
mp.add(p1);
mp.add(p2);
mp.add(p3);
mp.add(p4);
mp.add(p5);
mp.add(p6);
mp.add(p7);
mp.add(p8);
}
public class MyAction implements ActionListener
{
int counter=0;
public void actionPerformed(ActionEvent e)
{
if (e.getSource() == riceBtn)
{
counter++;
tfPrice1.setText("RM" + String.valueOf(counter*rice));
}
if (e.getSource() == noodleBtn)
{
counter++;
tfPrice2.setText("RM" + String.valueOf(counter*noodle));
}
if (e.getSource() == soupBtn)
{
counter++;
tfPrice3.setText("RM" + String.valueOf(counter*soup));
}
}
}
public class MyAction2 implements ActionListener
{
public void actionPerformed(ActionEvent e)
{
price1.setText(String.valueOf(tfPrice1));
price2.setText(String.valueOf(tfPrice2));
price3.setText(String.valueOf(tfPrice3));
Total = price1+price2+price3;
total.setText(String.valueOf(Total));
}
}
public class MyAction3 implements ActionListener
{
public void actionPerformed(ActionEvent e)
{
if(e.getSource() == rstBtn)
{
tfPrice1.setText("");
tfPrice2.setText("");
tfPrice3.setText("");
total.setText("");
}
}
}
public static void main(String [] args)
{
FoodOrder1 f = new FoodOrder1();
f.setVisible(true);
f.pack();
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.setSize(1000,800);
}
}
You don't need a variable to hold the value. Just extract the text from the text boxes whenever you need the value.
double totalPrice = 0.0;
totalPrice += Double.parseDouble(tfPrice1.getText());
totalPrice += Double.parseDouble(tfPrice2.getText());
totalPrice += Double.parseDouble(tfPrice3.getText());
total.setText(String.valueOf(totalPrice));
here is code to hold textfield value to some string
String data = txtdata.getText();
Take data entered to txtdata jTextField into data which is of string datatype
Related
my GUI program is about writing a psychology quiz for my class. It uses swing but I am getting two errors on terminal and I'm not sure what the problem is. Can I know what my error is?
MyGuiProject.java:78: error: ';' expected
int JLabel scoreK = new JLabel("Your score is " + score + ".");
^
MyGuiProject.java:78: error: <identifier> expected
int JLabel scoreK = new JLabel("Your score is " + score + ".");
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class MyGuiProject
extends JFrame implements ActionListener
{
//instance variables
//JFrame
private JFrame frame1 = new JFrame("Psychology Quiz");
private JFrame frame2 = new JFrame("Solutions");
//JPanel (p1 = panel 1)
private JPanel p1 = new JPanel();
private JPanel p2 = new JPanel();
private JPanel p3 = new JPanel();
//Fonts (f1 = font 1)
private Font f1 = new Font("Times New Roman", Font.BOLD, 30);
private Font f2 = new Font("Arial", Font.ITALIC, 30);
//Description (d1 = description)
private JLabel d1 = new JLabel("Psychology - Classical Conditioning");
//questions (q1 = question 1)
private JLabel q1 = new JLabel("Any behavior or action is...");
private JLabel q2 = new JLabel(
"All mental process associated with thinking, knowing, and remembering is...");
private JLabel q3 = new JLabel("American psychologist and founder of behaviorism is...");
//answers (a1 = answer 1)
private JButton a1 = new JButton("response");
private JButton a2 = new JButton("reaction");
private JButton a3 = new JButton("stimulus");
private JButton b1 = new JButton("recognition");
private JButton b2 = new JButton("cognition");
private JButton b3 = new JButton("classical conditioning");
private JButton c1 = new JButton("John B. Watson");
private JButton c2 = new JButton("Mr. Morgan");
private JButton c3 = new JButton("Mr. Ansari");
//Images
private ImageIcon image1 = new ImageIcon("ang.jpg");
private ImageIcon image2 = new ImageIcon("psych.jpg");
//JMenu
private JMenuBar ppap = new JMenuBar();
private JMenu menu1 = new JMenu("Questions");
private JMenuItem item1 = new JMenuItem("1");
private JMenuItem item2 = new JMenuItem("2");
private JMenuItem item3 = new JMenuItem("3");
//Solutions (s1 = solution 1)
private JLabel s1 = new JLabel(
"Answers: 1) response || 2) cognition || 3) John B. Watson (unfortunately)");
//Another program for adding points and label for adding points
int score = 0;
int JLabel scoreK = new JLabel("Your score is " + score + ".");
ScoreKeeper ang1 = new ScoreKeeper();
public void angWindow()
{
//setting frame
frame1.setBounds(0, 0, 300, 400);
frame1.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//addActionListener for JButton and JMenuItem
a1.addActionListener(this);
a2.addActionListener(this);
a3.addActionListener(this);
b1.addActionListener(this);
b2.addActionListener(this);
b3.addActionListener(this);
c1.addActionListener(this);
c2.addActionListener(this);
c3.addActionListener(this);
item1.addActionListener(this);
item2.addActionListener(this);
item3.addActionListener(this);
//setting font
d1.setFont(f1);
scoreK.setFont(f2);
//JPanel for questions
p1.add(a1);
p1.add(a2);
p1.add(a3);
p2.add(b1);
p2.add(b2);
p2.add(b3);
p3.add(c1);
p3.add(c2);
p3.add(c3);
//JMenu on JMenuBar
ppap.add(menu1);
//setting frame again
frame1.setJMenuBar(ppap);
frame1.add(q1, BorderLayout.SOUTH);
frame1.add(p1, BorderLayout.NORTH);
frame1.setVisible(true);
}
public void actionPerformed(ActionEvent e)
{
String command = e.getActionCommand();
if(command.equals("response"))
{
frame1.add(q2, BorderLayout.NORTH);
frame1.remove(q1);
frame1.remove(p1);
frame1.add(p2, BorderLayout.SOUTH);
score = ang1.trackScore(score);
frame1.validate();
frame1.repaint();
}
if(command.equals("reaction"))
{
frame1.remove(p1);
frame1.remove(q1);
frame1.add(p2, BorderLayout.NORTH);
frame1.add(q2, BorderLayout.SOUTH);
score = ang1.trackScore(score);
frame1.validate();
frame1.repaint();
}
if(command.equals("stimulus"))
{
frame1.remove(p1);
frame1.remove(q1);
frame1.add(p2, BorderLayout.NORTH);
frame1.add(q2, BorderLayout.SOUTH);
score = ang1.trackScore(score);
frame1.validate();
frame1.repaint();
}
if(command.equals("recognition"))
{
frame1.add(q2, BorderLayout.NORTH);
frame1.remove(q2);
frame1.remove(p2);
frame1.add(p3, BorderLayout.SOUTH);
score = ang1.trackScore(score);
frame1.validate();
frame1.repaint();
}
if(command.equals("cognition"))
{
frame1.add(q3, BorderLayout.NORTH);
frame1.remove(q2);
frame1.add(p3, BorderLayout.SOUTH);
frame1.validate();
frame1.repaint();
}
if(command.equals("classical conditioning"))
{
frame1.add(q2, BorderLayout.NORTH);
frame1.remove(q2);
frame1.remove(p2);
frame1.add(p3, BorderLayout.SOUTH);
score = ang1.trackScore(score);
frame1.validate();
frame1.repaint();
}
if(command.equals("John B. Watson"))
{
frame1.remove(q3);
frame1.remove(p3);
score = ang1.trackScore(score);
frame1.validate();
frame1.repaint();
frame2.setVisible(true);
}
if(command.equals("..."))
{
frame1.remove(p3);
frame1.remove(q3);
frame1.validate();
frame1.repaint();
score = ang1.trackScore(score);
frame2.setVisible(true);
}
if(command.equals("..."))
{
frame1.remove(p3);
frame1.remove(q3);
frame1.validate();
frame1.repaint();
score = ang1.trackScore(score);
frame2.setVisible(true);
}
frame1.remove(scoreK);
scoreK.setText("Your score is " + score + ".");
frame1.add(scoreK, BorderLayout.CENTER);
}
public static void main(String[] args)
{
MyGuiProject angBaby = new MyGuiProject();
angBaby.setWindow();
}
}
public class ScoreKeeper
{
public int trackScore(int score)
{
score = score + 2;
return score;
}
}
Is this an int or a JLabel ?
int JLabel scoreK = new JLabel("Your score is " + score + ".");
try
JLabel scoreK = new JLabel("Your score is " + score + ".");
For class I'm supposed to be creating an application that first lets you choose which value you'd like to calculate, then asks to enter the appropriate info. Then when you click "calculate", it SHOULD display the answer. For some reason my JLabel that should be displaying the answer isn't showing up. I've been searching for a solution, but every thing I do, nothing appears after you click "calculate". I am a novice, please help :(
package decay.application;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class DecayApplication implements ActionListener {
JFrame frame;
JPanel content;
JLabel prompt1, prompt2, prompt3, prompt4, displayFinal, displayIntitial, displayConstant, choose;
JTextField enterFinal, enterInitial, enterConstant, enterElapsed;
JButton finButton, inButton, conButton, calculate1, calculate2, calculate3;
public DecayApplication(){
frame = new JFrame("Decay Calculator");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
content = new JPanel();
content.setLayout(new GridLayout(0, 2, 10, 5));
content.setBorder(BorderFactory.createEmptyBorder(10, 10, 10, 10));
choose = new JLabel("Which would you like to calculate?");
content.add(choose);
finButton = new JButton("Final Amount");
finButton.setActionCommand("finalAmount");
finButton.addActionListener(this);
content.add(finButton);
inButton = new JButton("Initial Amount");
inButton.setActionCommand("initialAmount");
inButton.addActionListener(this);
content.add(inButton);
conButton = new JButton("Constant");
conButton.setActionCommand("constant");
conButton.addActionListener(this);
content.add(conButton);
frame.setContentPane(content);
frame.pack();
frame.setVisible(true);
}
public static void main(String[] args){new DecayApplication();}
public void actionPerformed(ActionEvent event) {
String clicked1 = event.getActionCommand();
String clicked2 = event.getActionCommand();
if (clicked1.equals("finalAmount")) {
prompt1 = new JLabel("Enter the initial amount:");
content.add(prompt1);
enterInitial = new JTextField(10);
content.add(enterInitial);
prompt2 = new JLabel("What's the constant?:");
content.add(prompt2);
enterConstant = new JTextField(10);
content.add(enterConstant);
prompt3 = new JLabel("How many years have elapsed?:");
content.add(prompt3);
enterElapsed = new JTextField(10);
content.add(enterElapsed);
calculate1 = new JButton("Calculate");
calculate1.setActionCommand("Calculate");
calculate1.addActionListener(this);
content.add(calculate1);
displayFinal = new JLabel(" ");
displayFinal.setForeground(Color.red);
content.add(displayFinal);
frame.pack();
if (clicked2.equals("Calculate")){
double finalAmount;
String e1 = enterInitial.getText();
String e2 = enterConstant.getText();
String e3 = enterElapsed.getText();
finalAmount = (Double.parseDouble(e1) + 2.0);
displayFinal.setText(Double.toString(finalAmount));
}
}
}
private static void runGUI() {
JFrame.setDefaultLookAndFeelDecorated(true);
DecayApplication decay = new DecayApplication();
}
}
Here's your method actionPerformed:
public void actionPerformed(ActionEvent event) {
String clicked1 = event.getActionCommand();
String clicked2 = event.getActionCommand();
if (clicked1.equals("finalAmount")) {
prompt1 = new JLabel("Enter the initial amount:");
content.add(prompt1);
enterInitial = new JTextField(10);
content.add(enterInitial);
prompt2 = new JLabel("What's the constant?:");
content.add(prompt2);
enterConstant = new JTextField(10);
content.add(enterConstant);
prompt3 = new JLabel("How many years have elapsed?:");
content.add(prompt3);
enterElapsed = new JTextField(10);
content.add(enterElapsed);
calculate1 = new JButton("Calculate");
calculate1.setActionCommand("Calculate");
calculate1.addActionListener(this);
content.add(calculate1);
displayFinal = new JLabel(" ");
displayFinal.setForeground(Color.red);
content.add(displayFinal);
frame.pack();
//here should the if-loop end, because here is the end of instructions which should be called after clicking on the button
}
//and here the second if-loop
if (clicked2.equals("Calculate")){
double finalAmount;
String e1 = enterInitial.getText();
String e2 = enterConstant.getText();
String e3 = enterElapsed.getText();
finalAmount = (Double.parseDouble(e1) + 2.0);
displayFinal.setText(Double.toString(finalAmount));
}
I have been googling an sherthing for an solution to this problem a lot but can't find any answer how to fix this. My problem is that when i start a new jframe from an actionevent from pressing a button the class white the JFrame opens but then the programs starts to freeze and the pop up windows stays blank.
Her is the cod i apologize if there is some bad programing or some words in swedish:
The start upp class:
import java.util.ArrayList;
public class maineClassen {
ArrayList<infoClass> Infon = new ArrayList<>();
public static void main (String [] args)
{
referenser referens = new referenser();
Startskärmen ss = new Startskärmen(referens);
}
}
The "startskärm" the first screen to com to:
public class Startskärmen extends JFrame implements ActionListener {
referenser referens;
ArrayList<infoClass> Infon;
JButton öppna = new JButton("open");
JButton ny = new JButton("create new");
JButton radera = new JButton("erase");
JScrollPane pane = new JScrollPane();
DefaultListModel mod = new DefaultListModel();
JList list = new JList(mod);
JScrollPane sp = new JScrollPane(list);
JLabel texten = new JLabel("pre-alpha 0.1");
public Startskärmen(referenser re)
{
//references should be sent by itself or received
referens = re;
Infon = referens.getInfoReferens();
//build up the window
JPanel labelPanel = new JPanel();
labelPanel.setLayout(new BoxLayout(labelPanel, BoxLayout.LINE_AXIS));
labelPanel.setBorder(BorderFactory.createEmptyBorder(10,10,0,10));
labelPanel.add(texten);
JPanel scrollPanel = new JPanel();
scrollPanel.setLayout(new BoxLayout(scrollPanel, BoxLayout.LINE_AXIS));
scrollPanel.setBorder(BorderFactory.createEmptyBorder(10,10,10,10));
scrollPanel.add(sp);// man kan ocksä sätta in --> pane <--
JPanel buttonPanel = new JPanel();
buttonPanel.setLayout(new BoxLayout(buttonPanel, BoxLayout.LINE_AXIS));
buttonPanel.setBorder(BorderFactory.createEmptyBorder(0, 10, 10, 10));
buttonPanel.add(Box.createHorizontalGlue());
buttonPanel.add(öppna);
buttonPanel.add(Box.createRigidArea(new Dimension(10, 0)));
buttonPanel.add(ny);
buttonPanel.add(Box.createRigidArea(new Dimension(10, 0)));
buttonPanel.add(radera);
Container contentPane = getContentPane();
contentPane.add(labelPanel,BorderLayout.NORTH);
contentPane.add(scrollPanel, BorderLayout.CENTER);
contentPane.add(buttonPanel, BorderLayout.PAGE_END);
setVisible(true);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
pack();
setSize(500, 500);
//adda action listener
ny.addActionListener(this);
öppna.addActionListener(this);
radera.addActionListener(this);
//skapaNyIC();
}
infoClass hh;
public void skapaNyIC()
{
Infon.add(new infoClass());
Infon.get(Infon.size() -1).referenser(Infon); //Infon.get(Infon.size() -1)
mod.addElement(Infon.get(Infon.size() -1).getName());
}
public void actionPerformed(ActionEvent e) {
if(e.getSource() == ny)
{
skapaNyIC();
}
else if(e.getSource() == öppna)
{
JOptionPane.showMessageDialog(texten,"This function doesn't exist yet");
}
else if(e.getSource() == radera)
{
JOptionPane.showMessageDialog(texten, "This function doesn't exist yet");
}
}
}
The class where the information will be stored and that creates the window (class) that will show the info:
public class infoClass {
ArrayList<infoClass> Infon;
private infoClass ic;
private String namn = "inget namn existerar";
private String infoOmInfo = null;
private int X_Rutor = 3;
private int Y_Rutor = 3;
private String[] information = new String[X_Rutor + Y_Rutor];
//info om dessa värden
public infoClass()
{
}
public void referenser(infoClass Tic)
{
ic = Tic;
infonGrafiskt ig = new infonGrafiskt(ic);
}
public void referenser(ArrayList<infoClass> Tic)
{
ic = Tic.get((Tic.size() - 1 ));
System.out.println("inna");
infonGrafiskt ig = new infonGrafiskt(ic);
ig.setVisible(true);
System.out.println("efter");
}
public String namnPåInfon()
{
return namn;
}
//namnen
public String getName()
{
return namn;
}
public void setNamn(String n)
{
namn = n;
}
//xkordinaterna
public int getX_Rutor()
{
return X_Rutor;
}
public void setX_Rutor(int n)
{
X_Rutor = n;
}
//y kordinaterna
public int getY_Rutor()
{
return Y_Rutor;
}
public void setY_Rutor(int n)
{
Y_Rutor = n;
}
//informationen
public String[] getInformationen()
{
return information;
}
public void setInformationen(String[] n)
{
information = n;
}
//infoOmInfo
public String getinfoOmInfo()
{
return infoOmInfo;
}
public void setinfoOmInfo(String n)
{
infoOmInfo = n;
}
}
The class that will show the info created by the window a bow:
public class infonGrafiskt extends JFrame implements ActionListener{
infoClass ic;
infonGrafiskt ig;
//tillrutnätet
JPanel panel = new JPanel(new SpringLayout());
boolean pausa = true;
//sakerna till desigen grund inställningar GI = grund inställningar
JButton GIklarKnapp = new JButton("Spara och gå vidare");
JTextField GInamn = new JTextField();
JLabel GINamnText = new JLabel("Namn:");
JTextField GIxRutor = new JTextField();
JLabel GIxRutorText = new JLabel("Antal rutor i X-led:");
JTextField GIyRutor = new JTextField();
JLabel GIyRutorText = new JLabel("Antal rutor i Y-led:");
JLabel GIInfo = new JLabel("Grund Inställningar");
// de olika framm:arna
JFrame GIframe = new JFrame("SpringGrid");
JFrame frame = new JFrame("SpringGrid");
//info om denna infon som finns här
JTextArea textArea = new JTextArea();
JScrollPane infoOmClasen = new JScrollPane(textArea); //hadde text area förut
JLabel infoRutan = new JLabel("Informatin om denna resuldatdatabank:");
//namnet på informationsdatabanken
JLabel namnetPåInfot = new JLabel("Namnet på denna resuldatdatabas.");
JButton ändraNamn = new JButton("Ändra namn");
JButton sparaAllt = new JButton("Spara allt");
public infonGrafiskt(infoClass Tic)
{
//få startinfo
namnOchRutor();
ic = Tic;
//skapar om rutan
JPanel p1 = new JPanel();
p1.setLayout(new BoxLayout(p1, BoxLayout.PAGE_AXIS));
p1.setBorder(BorderFactory.createEmptyBorder(10,10,10,10));
namnetPåInfot.setFont(new Font("Dialog",1,22));
p1.add(namnetPåInfot);
//pausa programet tills grundinställningarna är instälda
int m =1;
try {
while(m ==1)
{
Thread.sleep(100);
if(pausa == false)
m =2;
}
} catch(InterruptedException e) {
}
//Create the panel and populate it. skapar den så alla kommer åt den
//JPanel panel = new JPanel(new SpringLayout());
for (int i = 0; i < ic.getX_Rutor()*ic.getY_Rutor(); i++) {
JTextField textField = new JTextField(Integer.toString(i));
panel.add(textField);
}
//Lay out the panel.
SpringUtilities.makeGrid(panel,
ic.getY_Rutor(), ic.getX_Rutor(), //rows, cols
5, 5, //initialX, initialY
5, 5);//xPad, yPad
//set up the window.
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//p1.add(ändraNamn);
JPanel p2 = new JPanel();
p2.setLayout(new BoxLayout(p2, BoxLayout.PAGE_AXIS));
p2.setBorder(BorderFactory.createEmptyBorder(10,10,10,10));
p2.add(infoRutan);
infoOmClasen.setPreferredSize(new Dimension(0,100));
p2.add(infoOmClasen);
JPanel p3 = new JPanel();
p3.setLayout(new FlowLayout());
p3.setBorder(BorderFactory.createEmptyBorder(0,10,10,10));
p3.setLayout(new BoxLayout(p3, BoxLayout.LINE_AXIS));
p3.add(ändraNamn);
p3.add(sparaAllt);
//Set up the content pane.
panel.setOpaque(true); //content panes must be opaque
frame.setLayout(new BoxLayout(frame.getContentPane(), BoxLayout.PAGE_AXIS));
frame.add(p1);
frame.add(p2);
frame.add(panel);//frame.setContentPane(panel);
frame.add(p3);
//Display the window.
frame.pack();
sparaAllt.addActionListener(this);
ändraNamn.addActionListener(this);
}
private void namnOchRutor()
{
System.out.println("inna 2");
//sättigång action listner
GIklarKnapp.addActionListener(this);
frame.setVisible(false);
//frameStart.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
GIframe.setLayout(new BoxLayout(GIframe.getContentPane(), BoxLayout.PAGE_AXIS));
JPanel GIP0 = new JPanel();
GIP0.setLayout(new BoxLayout(GIP0,BoxLayout.LINE_AXIS));
GIP0.setBorder(BorderFactory.createEmptyBorder(10,10,10,10));
GIP0.add(GIInfo);
GIInfo.setFont(new Font("Dialog",1,22));
JPanel GIP1 = new JPanel();
GIP1.setLayout(new BoxLayout(GIP1,BoxLayout.LINE_AXIS));
GIP1.setBorder(BorderFactory.createEmptyBorder(10,10,10,10));
GIP1.add(GINamnText);
GIP1.add(Box.createRigidArea(new Dimension(10, 0)));
GIP1.add(GInamn);
JPanel GIP2 = new JPanel();
GIP2.setLayout(new BoxLayout(GIP2,BoxLayout.LINE_AXIS));
GIP2.setBorder(BorderFactory.createEmptyBorder(0,10,10,10));
GIP2.add(GIxRutorText);
GIP2.add(Box.createRigidArea(new Dimension(10, 0)));
GIP2.add(GIxRutor);
JPanel GIP3 = new JPanel();
GIP3.setLayout(new BoxLayout(GIP3,BoxLayout.LINE_AXIS));
GIP3.setBorder(BorderFactory.createEmptyBorder(0,10,10,10));
GIP3.add(GIyRutorText);
GIP3.add(Box.createRigidArea(new Dimension(10, 0)));
GIP3.add(GIyRutor);
JPanel GIP4 = new JPanel();
GIP4.setLayout(new BoxLayout(GIP4,BoxLayout.LINE_AXIS));
GIP4.setBorder(BorderFactory.createEmptyBorder(0,10,10,10));
GIP4.add(GIklarKnapp);
System.out.println("inna 3");
//lägga till sakerna gurund instllnings framen
GIframe.add(GIP0);
GIframe.add(GIP1);
GIframe.add(GIP2);
GIframe.add(GIP3);
GIframe.add(GIP4);
//desigen
System.out.println("inna 4");
GIframe.pack();
GIframe.setVisible(true);
System.out.println("inna5");
}
/*public static void main (String [] args)
{
infoClass i = new infoClass();
infonGrafiskt ig = new infonGrafiskt(i);
}*/
public void referenserna( infonGrafiskt Tig)
{
ig = Tig;
}
private void skrivTillbaka()
{
String[] tillfäligString = ic.getInformationen();
Component[] children = panel.getComponents();
for (int i=0;i<children.length;i++){
if (children[i] instanceof JTextField){
((JTextField)children[i]).setText(tillfäligString[i]);
System.out.println(tillfäligString[i]);
}
}
namnetPåInfot.setText(ic.getName());
textArea.setText(ic.getinfoOmInfo());
}
#Override
public void actionPerformed(ActionEvent e) {
if(e.getSource() == GIklarKnapp)
{
//skicka x och y antal ett och så
ic.setNamn(GInamn.getText());
ic.setX_Rutor(Integer.parseInt(GIxRutor.getText()));
ic.setY_Rutor(Integer.parseInt( GIyRutor.getText()));
namnetPåInfot.setText(ic.getName());
pausa = false;
GIframe.setVisible(false);
frame.setVisible(true);
}
if(e.getSource() == sparaAllt)
{
String[] tillfäligString = ic.getInformationen();
Component[] children = panel.getComponents();
for (int i=0;i<children.length;i++){
if (children[i] instanceof JTextField){
tillfäligString[i] = ((JTextField)children[i]).getText();
System.out.println(tillfäligString[i]);
}
}
ic.setInformationen(tillfäligString);
ic.setNamn(namnetPåInfot.getText());
ic.setinfoOmInfo(textArea.getText());
}
if(e.getSource() == ändraNamn)
{
skrivTillbaka();
}
}
}
so my problem now is that i can't create a new "infoclass" that will show the info in the "infoGrafikst" class. with the code:
Infon.add(new infoClass());
Infon.get(Infon.size() -1).referenser(Infon); //Infon.get(Infon.size() -1)
mod.addElement(Infon.get(Infon.size() -1).getName());
that am triggered by an button click.
Sorry for all the cod, but didn't know how to show my problem in another way.
Thanks a lot. I did find out that it was this code
int m =1;
try {
while(m ==1) {
Thread.sleep(100);
if(pausa == false)
m =2;
}
} catch(InterruptedException e) {
}
that made it not work...
Well I haven't gone through your code may be beacuse I am too lazy to read pages of code.Well i think the new window you are creating must be interfering with EDT.
Well i have done a short example which may help you, and its smooth:
import java.awt.event.ActionEvent;
import javax.swing.*;
public class FrameLaunch {
void inti(){
final JFrame f=new JFrame();
final JFrame f2=new JFrame();
final JTextArea ja=new JTextArea();
JButton b =new JButton("press for a new JFrame");
f2.add(b);
f2.pack();
f2.setVisible(true);
b.addActionListener(new java.awt.event.ActionListener()
{
public void actionPerformed(ActionEvent e) {
f2.setVisible(false);
f.setSize(200,200);
ja.setText("THIS IS NOT FROZEN");
f.add(ja);
f.setVisible(true);
f.setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
}
});
}
public static void main(String[] args)
{
FrameLaunch frame = new FrameLaunch();
frame.inti();
}
}
Can anyone tell me why my change QTY button isnt changing the QTY?
The buttonlistener2 is supposed to change the number of items in arrayCount[x]
to the number in the count JTextfield, but its not, could use a new set of eyes.
thanks all
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.util.ArrayList;
public class ProduceInventory extends JFrame
{
ArrayList<String> arrayName = new ArrayList<String>();
ArrayList<Integer> arrayCount = new ArrayList<Integer>();
// declares panels and items
private final int WINDOW_WIDTH = 450;
private final int WINDOW_HEIGHT = 350;
private JPanel panel1;
private JPanel panel2;
private JPanel panel3;
private JLabel messageLabel1;
private JLabel messageLabel2;
private JTextField name;
private JTextField count;
private JTextArea output;
private JButton add;
private JButton changeQTY;
private JButton delete;
private JButton clear;
private JButton report;
private JButton save;
private JButton load;
public ProduceInventory()
{
//creates Jframe
setTitle("Produce Inventory");
setSize(WINDOW_WIDTH, WINDOW_HEIGHT);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setLayout(new BorderLayout());
panel1(); //build panels
panel2();
panel3();
add(panel1, BorderLayout.NORTH); //add panels
add(panel2, BorderLayout.SOUTH);
add(panel3, BorderLayout.CENTER);
setVisible(true);
}
private void panel1() //builds panel 1
{
messageLabel1 = new JLabel("Name");
messageLabel2 = new JLabel("Count");
name = new JTextField(20);
count = new JTextField(5);
panel1 = new JPanel();
panel1.add(messageLabel1);
panel1.add(name);
panel1.add(messageLabel2);
panel1.add(count);
}
private void panel2() //builds panel 2
{
add = new JButton("Add");
changeQTY = new JButton("CHANGE QTY");
delete = new JButton("Delete");
clear = new JButton("Clear");
report = new JButton("Report");
save = new JButton("Save File");
load = new JButton("Load File");
add.addActionListener(new ButtonListener());
changeQTY.addActionListener(new ButtonListener2());
panel2 = new JPanel();
panel2.setLayout(new GridLayout(2,4));
panel2.add(add);
panel2.add(changeQTY);
panel2.add(delete);
panel2.add(clear);
panel2.add(report);
panel2.add(save);
panel2.add(load);
}
private void panel3() //builds panel 3
{
output = new JTextArea(10,30);
panel3 = new JPanel();
panel3.add(output);
}
private class ButtonListener implements ActionListener //add listener
{
String nameIn;
String countIn;
int number;
public void actionPerformed(ActionEvent e)
{
String actionCommand = e.getActionCommand();
if (actionCommand.equals("Add"))
{
nameIn = name.getText();
arrayName.add(name.getText());
countIn = count.getText();
number = Integer.parseInt(countIn);
arrayCount.add(number);
output.setText(name.getText() + " " + count.getText() + " Item Added");
for(int x = 0; x <= arrayName.size() - 1; x++)
{
System.out.print((x+1)+ ". " + arrayName.get(x) + " " + arrayCount.get(x) + "\n");
}
}
}
}
private class ButtonListener2 implements ActionListener //add listener
{
public void actionPerformed(ActionEvent e)
{
String nameIn;
String countIn;
int number;
String actionCommand = e.getActionCommand();
if (actionCommand.equals("CHANGE QTY"))
{
nameIn = name.getText();
countIn = count.getText();
number = Integer.parseInt(countIn);
for(int x = 0; x <= arrayName.size() - 1; x++)
{
if(arrayName.get(x) == nameIn)
{
arrayCount.set(x, number);
}
}
output.setText("Qty is updated to: " + number);
for(int x = 0; x <= arrayName.size() - 1; x++)
{
System.out.print((x+1)+ ". " + arrayName.get(x) + " " + arrayCount.get(x) + "\n");
}
}
}
}
public static void main(String[] args)
{
new ProduceInventory(); //runs program
}
}
In the action listener, on the line
if(arrayName.get(x) == nameIn)
you are checking if the two variables refer to the same object. Instead of that you have to check if the objects they refer to are equal:
if(nameIn.equals(arrayName.get(x)))
I wanted to ask that if an exception occurs, then display a certain String in the textfield. When I try using a try, catch IOException, it gives me an error that cannot have a catch in the same body as a try. This should probably be done in the action performed method.
GUI:
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.util.ArrayList;
public class GUI extends JFrame implements ActionListener
{
JPanel buttonPanel, topPanel, operationPanel;
JTextField display = new JTextField(20);
doMath math = new doMath();
String s = "";
String b= "";
//int counter;
JButton Num1;
JButton Num2;
JButton Num3;
JButton Num4;
JButton Num5;
JButton Num6;
JButton Num7;
JButton Num8;
JButton Num9;
JButton Num0;
JButton Add;
JButton Sub;
JButton Mult;
JButton Div;
JButton Eq;
JButton Clr;
JButton Space;
public GUI()
{
super("Calculator");
setSize(400,400);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JPanel mainPanel = new JPanel();
mainPanel.setLayout(new GridLayout (2,1));
buttonPanel = new JPanel();
buttonPanel.setLayout(new GridLayout(5, 4));
buttonPanel.add(Num1 = new JButton("1"));
buttonPanel.add(Num2 = new JButton("2"));
buttonPanel.add(Num3 = new JButton("3"));
buttonPanel.add(Num4 = new JButton("4"));
buttonPanel.add(Num5 = new JButton("5"));
buttonPanel.add(Num6 = new JButton("6"));
buttonPanel.add(Num7 = new JButton("7"));
buttonPanel.add(Num8 = new JButton("8"));
buttonPanel.add(Num9 = new JButton("9"));
buttonPanel.add(Num0 = new JButton("0"));
buttonPanel.add(Clr = new JButton("C"));
buttonPanel.add(Eq = new JButton("="));
buttonPanel.add(Add = new JButton("+"));
buttonPanel.add(Sub = new JButton("-"));
buttonPanel.add(Mult = new JButton("*"));
buttonPanel.add(Div = new JButton("/"));
buttonPanel.add(Space = new JButton("Space"));
Num1.addActionListener(this);
Num2.addActionListener(this);
Num3.addActionListener(this);
Num4.addActionListener(this);
Num5.addActionListener(this);
Num6.addActionListener(this);
Num7.addActionListener(this);
Num8.addActionListener(this);
Num9.addActionListener(this);
Num0.addActionListener(this);
Clr.addActionListener(this);
Eq.addActionListener(this);
Add.addActionListener(this);
Sub.addActionListener(this);
Mult.addActionListener(this);
Div.addActionListener(this);
Space.addActionListener(this);
topPanel = new JPanel();
topPanel.setLayout(new FlowLayout());
topPanel.add(display);
add(mainPanel);
mainPanel.add(topPanel, BorderLayout.NORTH);
mainPanel.add(buttonPanel, BorderLayout.SOUTH);
setVisible(true);
}
public void actionPerformed(ActionEvent e)
{
JButton source = (JButton)e.getSource();
String text = source.getText();
try{
if (text.equals("="))
{
doMath math = new doMath();
b = b.replaceAll("\\s+", " ");
int result = math.doMath1(b);
String answer = ""+result;
display.setText(answer);
}
else if(text.equals("Space"))
{
b+=" ";
display.setText(b);
}
else if (text.equals("C"))
{
b = "";
display.setText(b);
}
else if (text.equals("+") || text.equals("-") || text.equals("*") || text.equals("/"))
{
b += (" "+(text)+ " ");
display.setText(b);
}
else
{
b += (text);
display.setText(b);
}
}
catch(IOException o)
{display.setText(b);}
}
}
When I try using a try, catch IOException, it gives me an error that
cannot have a catch in the same body as a try
The error is self-explanatory. The following code is illegal:
try{
catch(Exception ex){
}
}
You want this:
try{
//stuff i need to do
} //close the try
catch(IOException ioex)
{
//log and recover
}
=UPDATE
Based on the code block below (the same that OP is talking about in case it is changed later) The actual error message that is being displayed is this:
Unreachable catch block for IOException. This exception is never
thrown from the try statement body GUI.java
The reason this occurs is that there is nothing that generates an IOException in your code, the only exception you can define without an explicit throw from one of your functions is the top level Exception.
public class GUI extends JFrame implements ActionListener
{
JPanel buttonPanel, topPanel, operationPanel;
JTextField display = new JTextField(20);
doMath math = new doMath();
String s = "";
String b= "";
//int counter;
JButton Num1;
JButton Num2;
JButton Num3;
JButton Num4;
JButton Num5;
JButton Num6;
JButton Num7;
JButton Num8;
JButton Num9;
JButton Num0;
JButton Add;
JButton Sub;
JButton Mult;
JButton Div;
JButton Eq;
JButton Clr;
JButton Space;
public GUI()
{
super("Calculator");
setSize(400,400);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JPanel mainPanel = new JPanel();
mainPanel.setLayout(new GridLayout (2,1));
buttonPanel = new JPanel();
buttonPanel.setLayout(new GridLayout(5, 4));
buttonPanel.add(Num1 = new JButton("1"));
buttonPanel.add(Num2 = new JButton("2"));
buttonPanel.add(Num3 = new JButton("3"));
buttonPanel.add(Num4 = new JButton("4"));
buttonPanel.add(Num5 = new JButton("5"));
buttonPanel.add(Num6 = new JButton("6"));
buttonPanel.add(Num7 = new JButton("7"));
buttonPanel.add(Num8 = new JButton("8"));
buttonPanel.add(Num9 = new JButton("9"));
buttonPanel.add(Num0 = new JButton("0"));
buttonPanel.add(Clr = new JButton("C"));
buttonPanel.add(Eq = new JButton("="));
buttonPanel.add(Add = new JButton("+"));
buttonPanel.add(Sub = new JButton("-"));
buttonPanel.add(Mult = new JButton("*"));
buttonPanel.add(Div = new JButton("/"));
buttonPanel.add(Space = new JButton("Space"));
Num1.addActionListener(this);
Num2.addActionListener(this);
Num3.addActionListener(this);
Num4.addActionListener(this);
Num5.addActionListener(this);
Num6.addActionListener(this);
Num7.addActionListener(this);
Num8.addActionListener(this);
Num9.addActionListener(this);
Num0.addActionListener(this);
Clr.addActionListener(this);
Eq.addActionListener(this);
Add.addActionListener(this);
Sub.addActionListener(this);
Mult.addActionListener(this);
Div.addActionListener(this);
Space.addActionListener(this);
topPanel = new JPanel();
topPanel.setLayout(new FlowLayout());
topPanel.add(display);
add(mainPanel);
mainPanel.add(topPanel, BorderLayout.NORTH);
mainPanel.add(buttonPanel, BorderLayout.SOUTH);
setVisible(true);
}
public void actionPerformed(ActionEvent e)
{
JButton source = (JButton)e.getSource();
String text = source.getText();
try{
if (text.equals("="))
{
doMath math = new doMath();
b = b.replaceAll("\\s+", " ");
int result = math.doMath1(b);
String answer = ""+result;
display.setText(answer);
}
else if(text.equals("Space"))
{
b+=" ";
display.setText(b);
}
else if (text.equals("C"))
{
b = "";
display.setText(b);
}
else if (text.equals("+") || text.equals("-") || text.equals("*") || text.equals("/"))
{
b += (" "+(text)+ " ");
display.setText(b);
}
else
{
b += (text);
display.setText(b);
}
}
catch(IOException o)
{display.setText(b);}
}
}