Develop Reference

JPanel gets compressed and disappears when trying to move to the bottom

I have to do a project in Java and thought a GUI Text Adventure would be cool. My Problem is that when I create a JPanel and move it further down on the screen, the panel first changes its size and then disappears completely at one point.
On the GameScreen there should be a panel for choice Options to be put on but it refuses to go further down than about half the size of the Screen.
Here's the code:
import java.awt.Color;
import java.awt.Container;
import java.awt.Font;
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.JTextArea;
public class Yeet {
JFrame epicOfYeet;
Container con;
JPanel titleNamePanel, startButtonPanel, mainTextPanel, choiceButtonPanel;
JLabel titleNameLabel;
Font titleFont = new Font("Times New Roman", Font.PLAIN, 90);
Font normalFont = new Font ("Times New Roman", Font.PLAIN, 55);
JButton startButton;
JButton choice1;
JButton choice2;
JButton choice3;
JButton choice4;
JTextArea mainTextArea;
TitleScreenHandler tsHandler = new TitleScreenHandler();
public static void main(String[] args) {
new Yeet();
}
public Yeet() {
epicOfYeet = new JFrame();
epicOfYeet.setSize(1200, 1000);
epicOfYeet.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
epicOfYeet.getContentPane().setBackground(Color.black);
epicOfYeet.setLayout(null);
con = epicOfYeet.getContentPane();
titleNamePanel = new JPanel();
titleNamePanel.setBounds(190, 100, 800, 230);
titleNamePanel.setBackground(Color.black);
titleNameLabel = new JLabel("EPIC OF YEET");
titleNameLabel.setForeground(Color.red);
titleNameLabel.setFont(titleFont);
startButtonPanel = new JPanel();
startButtonPanel.setBounds(400, 500, 400, 100);
startButtonPanel.setBackground(Color.black);
startButton = new JButton("START");
startButton.setBackground(Color.black);
startButton.setForeground(Color.white);
startButton.setFont(normalFont);
startButton.addActionListener(tsHandler);
startButton.setFocusPainted(false);
titleNamePanel.add(titleNameLabel);
startButtonPanel.add(startButton);
con.add(titleNamePanel);
con.add(startButtonPanel);
epicOfYeet.setVisible(true);
}
public void createGameScreen(){
titleNamePanel.setVisible(false);
startButtonPanel.setVisible(false);
mainTextPanel = new JPanel();
mainTextPanel.setBounds(100, 100, 1000, 400);
mainTextPanel.setBackground(Color.green);
con.add(mainTextPanel);
mainTextArea = new JTextArea("You come to your senses again.\nThe dewy grass you're laying on is gleaming with moonlight.\nYour body aches as you get up and catch a \nglimpse of your surroundings.\n");
mainTextArea.setBounds(100, 100, 1000, 250);
mainTextArea.setBackground(Color.blue);
mainTextArea.setForeground(Color.white);
mainTextArea.setFont(normalFont);
mainTextArea.setLineWrap(true);
mainTextPanel.add(mainTextArea);
choiceButtonPanel = new JPanel();
choiceButtonPanel.setBounds(300, 500, 600, 550);
choiceButtonPanel.setBackground(Color.red);
con.add(choiceButtonPanel);
}
public class TitleScreenHandler implements ActionListener{
#Override
public void actionPerformed(ActionEvent event) {
createGameScreen();
}
}
}

Here is a basic implementation using layout mangers, avoiding the bad practice of null layout manager.
It is not an optimal one, but should get you started:
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.Font;
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.JTextArea;
public class Yeet {
JFrame epicOfYeet;
Container con;
JPanel titleNamePanel, startButtonPanel, mainTextPanel, choiceButtonPanel;
JLabel titleNameLabel;
Font titleFont = new Font("Times New Roman", Font.PLAIN, 90);
Font normalFont = new Font ("Times New Roman", Font.PLAIN, 55);
JButton startButton, coice1, choice2, choice3, choice4;
JTextArea mainTextArea;
TitleScreenHandler tsHandler = new TitleScreenHandler();
public static void main(String[] args) {
SwingUtilities.invokeLater(()->new Yeet());
}
public Yeet() {
epicOfYeet = new JFrame();
//epicOfYeet.setSize(1200, 1000); // do not set size. let layout manager calcualte it
epicOfYeet.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
epicOfYeet.getContentPane().setBackground(Color.black);
//epicOfYeet.setLayout(null); //aviod null layouts Jframe uses BorderLayout by default
con = epicOfYeet.getContentPane();
titleNamePanel = new JPanel();
//titleNamePanel.setBounds(190, 100, 800, 230);
titleNamePanel.setPreferredSize(new Dimension(800, 230));//set preferred size to be used by layout manager
titleNamePanel.setBackground(Color.black);
titleNameLabel = new JLabel("EPIC OF YEET");
titleNameLabel.setForeground(Color.red);
titleNameLabel.setFont(titleFont);
startButtonPanel = new JPanel();
//startButtonPanel.setBounds(400, 500, 400, 100);
startButtonPanel.setPreferredSize(new Dimension(400, 100));
startButtonPanel.setBackground(Color.black);
startButton = new JButton("START");
startButton.setBackground(Color.black);
startButton.setForeground(Color.white);
startButton.setFont(normalFont);
startButton.addActionListener(tsHandler);
startButton.setFocusPainted(false);
titleNamePanel.add(titleNameLabel);
startButtonPanel.add(startButton);
con.add(titleNamePanel, BorderLayout.PAGE_START); //set to top
con.add(startButtonPanel, BorderLayout.PAGE_END); //set to bottom
epicOfYeet.pack();
epicOfYeet.setVisible(true);
}
public void createGameScreen(){
//titleNamePanel.setVisible(false);
//startButtonPanel.setVisible(false);
con.remove(titleNamePanel);
con.remove(startButtonPanel);
mainTextPanel = new JPanel();
//mainTextPanel.setBounds(100, 100, 1000, 400);
mainTextPanel.setBackground(Color.green);
con.add(mainTextPanel); // added to center position of the BorderLayout (the default)
mainTextArea = new JTextArea(10, 20); //size in rows, cols
mainTextArea.setText("You come to your senses again.\nThe dewy grass you're laying on is gleaming with moonlight.\nYour body aches as you get up and catch a \nglimpse of your surroundings.\n");
//mainTextArea.setBounds(100, 100, 1000, 250);
mainTextArea.setBackground(Color.blue);
mainTextArea.setForeground(Color.white);
mainTextArea.setFont(normalFont);
mainTextArea.setLineWrap(true);
mainTextPanel.add(mainTextArea);
choiceButtonPanel = new JPanel();
//choiceButtonPanel.setBounds(300, 500, 600, 550);
choiceButtonPanel.setPreferredSize(new Dimension(600, 550));
choiceButtonPanel.setBackground(Color.red);
con.add(choiceButtonPanel, BorderLayout.PAGE_END);//add to bottom
epicOfYeet.pack();
}
public class TitleScreenHandler implements ActionListener{
#Override
public void actionPerformed(ActionEvent event) {
createGameScreen();
}
}
}

Add 3D effects in JTable

I created a JTable using the code:
List<String> visibleColumns = new ArrayList<String>();
visibleColumns.add("Column 1");
visibleColumns.add("Column 2");
visibleColumns.add("Column 3");
DefaultTableModel tableModel = new DefaultTableModel(visibleColumns.toArray(),100);
JTable table = new JTable(tableModel);
JPanel panel = new SwingPaneTable();
panel.setBounds(0, 0, 280, 150);
panel.setLayout(new BorderLayout());
panel.add(table, BorderLayout.CENTER);
panel.add(table.getTableHeader(), BorderLayout.NORTH);
// Set Row Header
JList<String> rowHeader = new JList<String>();
rowHeader.setFixedCellWidth(18);
rowHeader.setFixedCellHeight(18);
rowHeader.setBackground(panel.getBackground());
rowHeader.setBorder(UIManager.getBorder("TableHeader.cellBorder"));
JScrollPane scroll = new JScrollPane(table, JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED, JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
scroll.setRowHeaderView(rowHeader);
panel.add(scroll, BorderLayout.CENTER);
And the table looks like that:
Now, I need to add this effects im my table:
Someone knows how I do this in this code?

You seem to be going to a lot of effort which doesn't seem to be required (IMHO)...
JScrollPane provides you with the means to add corners to each of the corner of the scroll pane as well as provide row and column headers...
See http://docs.oracle.com/javase/tutorial/uiswing/components/scrollpane.html
In the case of JTable, it applies the JTableHeader to the JScrollPane's column header area automatically.
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.util.ArrayList;
import java.util.List;
import javax.swing.BorderFactory;
import javax.swing.JFrame;
import javax.swing.JList;
import javax.swing.JPanel;
import javax.swing.JScrollBar;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.ScrollPaneConstants;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
import javax.swing.border.BevelBorder;
import javax.swing.border.CompoundBorder;
import javax.swing.border.EtchedBorder;
import javax.swing.border.MatteBorder;
import javax.swing.table.DefaultTableModel;
public class TableExample {
public static void main(String[] args) {
new TableExample();
}
public TableExample() {
EventQueue.invokeLater(new Runnable() {
#Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
}
List<String> visibleColumns = new ArrayList<String>();
visibleColumns.add("Column 1");
visibleColumns.add("Column 2");
visibleColumns.add("Column 3");
DefaultTableModel tableModel = new DefaultTableModel(visibleColumns.toArray(), 100);
JTable table = new JTable(tableModel);
JScrollPane scroll = new JScrollPane(table, JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED, JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
JPanel left = new JPanel();
left.setBorder(BorderFactory.createBevelBorder(BevelBorder.LOWERED));
scroll.setCorner(ScrollPaneConstants.UPPER_LEFT_CORNER, left);
JPanel right = new JPanel();
right.setBorder(BorderFactory.createBevelBorder(BevelBorder.LOWERED));
scroll.setCorner(ScrollPaneConstants.UPPER_RIGHT_CORNER, right);
JPanel columnHeader = new JPanel() {
#Override
public Dimension getPreferredSize() {
JScrollBar sb = new JScrollBar(JScrollBar.VERTICAL);
return new Dimension(sb.getPreferredSize().width, 10);
}
};
columnHeader.setBorder(new CompoundBorder(
new MatteBorder(1, 1, 0, 0, Color.WHITE),
new MatteBorder(0, 0, 1, 1, Color.GRAY)
));
scroll.setRowHeaderView(columnHeader);
JFrame frame = new JFrame("Testing");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLayout(new BorderLayout());
frame.add(scroll);
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
}

JTextArea Won't Update Unless I Resize JFrame

Whenever I run my program my JTextArea does not follow the dimension that I have given it, but if I resize my JFrame it updates and sets its size to what I put.
What is the issue?
public ControlPanel() {
// create our list of players
list = new JList(model);
// create our scroll panes
userspane = new JScrollPane(list);
consolepane = new JScrollPane(console);
// set sizes
userspane.setSize(100, 500);
jta.setSize(100, 500);
list.setSize(100, 500);
consolepane.setSize(100, 500);
console.setSize(100, 500);
// add to panel
panel.add(userspane, BorderLayout.CENTER);
panel.add(kick);
panel.add(ban);
panel.add(info);
panel.add(consolepane, BorderLayout.CENTER);
// set frame properties
setTitle("RuneShadows CP");
setSize(280, 400);
//setResizable(false);
setDefaultCloseOperation(EXIT_ON_CLOSE);
setContentPane(panel);
setVisible(true);
}

Don't set the sizes to anything.
For JTextArea you can use the constructor JTextArea(int rows, int charSpaces)
Just pack() the JFrame and it will respect all the preferred sizes of the components inside.
Also instead of setting the content pane to the panel, just add the panel. That will respect the preffered size of the panel when pack() is called
I'm not exactly sure what variable was what (or the sizes you wanted the), so I assumed text areas, and others as well. See this example where I just used the JTextArea constructor I mentioned and just packed.
EDITED with no sizes set
import java.awt.BorderLayout;
import javax.swing.DefaultListModel;
import javax.swing.JButton;
import javax.swing.JFrame;
import static javax.swing.JFrame.EXIT_ON_CLOSE;
import javax.swing.JList;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.SwingUtilities;
public class ControlPanel extends JFrame {
JScrollPane userspane;
JList list;
DefaultListModel model = new DefaultListModel();
JScrollPane consolepane;
JTextArea console = new JTextArea(20, 50);
JTextArea jta = new JTextArea(6, 50);
JPanel panel = new JPanel();
JButton kick = new JButton("Kick");
JButton ban = new JButton("Ban");
JButton info = new JButton("Info");
public ControlPanel() {
// create our list of players
list = new JList(model);
// create our scroll panes
userspane = new JScrollPane(list);
consolepane = new JScrollPane(console);
// add to panel
panel.add(userspane, BorderLayout.CENTER);
panel.add(kick);
panel.add(ban);
panel.add(info);
panel.add(consolepane, BorderLayout.CENTER);
add(panel);
pack();
setTitle("RuneShadows CP");
//setResizable(false);
setDefaultCloseOperation(EXIT_ON_CLOSE);
setVisible(true);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable(){
public void run(){
new ControlPanel();
}
});
}
}
UPDATE - with positioning
Keep in mind also, with BorderLayout you need to specify a position for every component you add or else it will default to CENTER and each position an only have one component. I noticed you trying to add two components to the CENTER
import java.awt.BorderLayout;
import javax.swing.DefaultListModel;
import javax.swing.JButton;
import javax.swing.JFrame;
import static javax.swing.JFrame.EXIT_ON_CLOSE;
import javax.swing.JList;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.SwingUtilities;
public class ControlPanel extends JFrame {
JScrollPane userspane;
JList list;
DefaultListModel model = new DefaultListModel();
JScrollPane consolepane;
JTextArea console = new JTextArea(20, 50);
JTextArea jta = new JTextArea(6, 50);
JPanel panel = new JPanel(new BorderLayout());
JButton kick = new JButton("Kick");
JButton ban = new JButton("Ban");
JButton info = new JButton("Info");
public ControlPanel() {
// create our list of players
list = new JList(model);
// create our scroll panes
userspane = new JScrollPane(list);
consolepane = new JScrollPane(console);
// add to panel
panel.add(userspane, BorderLayout.SOUTH);
JPanel buttonPanel = new JPanel();
buttonPanel.add(kick);
buttonPanel.add(ban);
buttonPanel.add(info);
panel.add(buttonPanel, BorderLayout.CENTER);
panel.add(consolepane, BorderLayout.NORTH);
add(panel);
pack();
setTitle("RuneShadows CP");
//setResizable(false);
setDefaultCloseOperation(EXIT_ON_CLOSE);
setVisible(true);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable(){
public void run(){
new ControlPanel();
}
});
}
}

Java Swing JLayeredPane not showing up

I seem to be having some major issues with JLayeredPane. I have a BorderLayout() pane, and I'd like for the West-side element to contain a few JLayeredPane's on top of each other, so I can switch between them to show the right information.
The west pane should be 200 pixels wide and should be as long as the total window is. In my sample code I have added two layers to the JLayeredPanel, but they don't show up. They should be in the west pane.
Here is my code:
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JLayeredPane;
import javax.swing.JPanel;
public class Main {
private static JFrame mainFrame = new JFrame();
private static JPanel mainPane = new JPanel();
public Main(){}
public static void initGui(){
JLayeredPane westPanel = new JLayeredPane();
westPanel.setPreferredSize(new Dimension(200,0));
westPanel.setBackground(Color.blue);
JPanel layerOne = new JPanel();
layerOne.add(new JLabel("This is layer 1"));
westPanel.add(layerOne, new Integer(0), 0);
JPanel layerTwo = new JPanel();
layerTwo.add(new JLabel("This si layer 2"));
westPanel.add(layerTwo, new Integer(1), 0);
JPanel centerPanel = new JPanel();
centerPanel.setBackground(Color.yellow);
JPanel eastPanel = new JPanel();
eastPanel.setPreferredSize(new Dimension(200,0));
eastPanel.setBackground(Color.red);
mainPane = new JPanel(new BorderLayout());
mainPane.add(westPanel, BorderLayout.WEST);
mainPane.add(centerPanel, BorderLayout.CENTER);
mainPane.add(eastPanel, BorderLayout.EAST);
mainFrame = new JFrame("Learning to use JLayeredPane");
mainFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
mainFrame.setBounds(200, 200, 800, 500);
mainFrame.setContentPane(mainPane);
mainFrame.setVisible(true);
}
public static void main(String[] args) {
initGui();
}
}
What this results in:

JLayeredPane uses a null layout and so you are responsible for stating the size and location of all components added to it. If not they will default to a location of [0, 0] and a size of [0, 0].

try this, its working
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JLayeredPane;
import javax.swing.JPanel;
public class Main {
private static JFrame mainFrame = new JFrame();
private static JPanel mainPane = new JPanel();
public Main(){}
public static void initGui(){
JLayeredPane westPanel = new JLayeredPane();
westPanel.setLayout(null);
westPanel.setPreferredSize(new Dimension(200,0));
westPanel.setBackground(Color.blue);
JPanel layerOne = new JPanel();
layerOne.add(new JLabel("This is layer 1"));
layerOne.setBounds(0, 0, 100, 100);
westPanel.add(layerOne, new Integer(0), 0);
JPanel layerTwo = new JPanel();
layerTwo.add(new JLabel("This si layer 2"));
layerTwo.setBounds(0, 100, 100, 100);
westPanel.add(layerTwo, new Integer(1), 0);
JPanel centerPanel = new JPanel();
centerPanel.setBackground(Color.yellow);
JPanel eastPanel = new JPanel();
eastPanel.setPreferredSize(new Dimension(200,0));
eastPanel.setBackground(Color.red);
mainPane = new JPanel();
mainPane.setLayout(new BorderLayout());
mainPane.add(westPanel, BorderLayout.WEST);
mainPane.add(centerPanel, BorderLayout.CENTER);
mainPane.add(eastPanel, BorderLayout.EAST);
mainFrame = new JFrame("Learning to use JLayeredPane");
mainFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
mainFrame.setBounds(200, 200, 800, 500);
mainFrame.setContentPane(mainPane);
mainFrame.setVisible(true);
}
public static void main(String[] args) {
initGui();
}
}

Java: Objects in JFrame are messed up

I'm creating a simple Java JFrame in Eclipse with a label, 2 radio buttons with 2 textfields, and a JButton. When i run the program, the objects inside it are messed up, the buttons and textfields don't show up and sometimes a textfield takes the entire size of the frame. However, when I minimize/maximize the frame and then restore it, they work normally. Here's the code:
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import javax.swing.BorderFactory;
import javax.swing.Box;
import javax.swing.BoxLayout;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JRadioButton;
import javax.swing.JTextField;
public class myframe {
public static void main(String s[]) {
JFrame frame = new JFrame("Title");
frame.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
// This is an empty content area in the frame
JLabel jlbempty = new JLabel("");
jlbempty.setPreferredSize(new Dimension(500, 400));
frame.getContentPane().add(jlbempty, BorderLayout.CENTER);
frame.pack();
frame.setVisible(true);
frame.setBounds(0, 0, 500, 400);
JPanel panel = new JPanel();
frame.getContentPane().add(panel, BorderLayout.NORTH);
panel.setLayout(new BoxLayout(panel, BoxLayout.PAGE_AXIS));
panel.add(Box.createRigidArea(new Dimension(0,5)));
panel.setBorder(BorderFactory.createEmptyBorder(10,10,10,10));
JLabel label = new JLabel("My label");
panel.add(label);
JPanel buttonPane = new JPanel();
frame.add(buttonPane);
buttonPane.setLayout(new BoxLayout(buttonPane, BoxLayout.LINE_AXIS));
buttonPane.setBorder(BorderFactory.createEmptyBorder(10, 10, 10, 10));
JRadioButton cb = new JRadioButton("1");
buttonPane.add(cb);
JTextField tf = new JTextField(0);
tf.setText("");
buttonPane.add(tf);
JPanel panel3 = new JPanel();
frame.add(panel3);
panel3.setLayout(new BoxLayout(panel3, BoxLayout.LINE_AXIS));
panel3.setBorder(BorderFactory.createEmptyBorder(10, 10, 10, 10));
JRadioButton cb2 = new JRadioButton("2");
panel3.add(cb2);
JTextField tf2 = new JTextField(0);
tf.setText("");
panel3.add(tf2);
JPanel panel2 = new JPanel();
JButton button = new JButton("click me");
frame.add(panel2);
panel2.add(button);
button.addActionListener(new Action());
panel.add(buttonPane);
panel.add(panel3);
panel.add(panel2);
}
static class Action implements ActionListener{
public void actionPerformed(ActionEvent arg0) {
JFrame frame2 = new JFrame("Clicked");
frame2.setVisible(true);
frame2.setSize(100, 200);
JLabel label2 = new JLabel("You clicked me");
JPanel panel2 = new JPanel();
frame2.add(panel2);
frame2.add(label2);
}
}
}

In your main method you need to do this at the very end:
frame.pack();
frame.setVisible(true);

You should call frame.pack(); again after adding all the components, so that all the container elements can resize to fit their components best.
http://docs.oracle.com/javase/7/docs/api/java/awt/Window.html#pack()
You should also call frame.SetVisible(true); at the very end, so the form is only displayed ones all components are loaded (otherwise you can see a black box while it loads).