I'm trying to make a JList. For some reason the JLabel of some random elements have a top padding like this:
As you can see in the picture, the first, fourth, and seventh row all have a top padding in their first JLabel. One way I managed to eliminate this effect is by making the text in the JLabel only one line, but that doesn't solve the problem because I need it to contain multiple lines.
Code:
package maya.page;
import maya.Main;
import maya.object.Module;
import maya.object.Occurrence;
import javax.swing.*;
import javax.swing.border.BevelBorder;
import javax.swing.border.EmptyBorder;
import java.awt.*;
public class StudentModulePanel extends JPanel {
public StudentModulePanel(){
DefaultListModel<Occurrence> listModel = new DefaultListModel<>();
listModel.addAll(Main.modules.get("WIX1002").getOccurrences());
JList<Occurrence> list = new JList<>(listModel);
list.setCellRenderer(new OccurrenceRenderer());
JScrollPane scrollPane = new JScrollPane(list);
setLayout(new GridBagLayout());
GridBagConstraints c = new GridBagConstraints();
add(scrollPane, c);
setBackground(new Color(180, 230, 230));
}
}
class OccurrenceRenderer extends OccurrencePanel implements ListCellRenderer<Occurrence>{
#Override
public Component getListCellRendererComponent(JList<? extends Occurrence> list, Occurrence value, int index, boolean isSelected, boolean cellHasFocus) {
setOccurrence(value);
if(isSelected){
setBorder(new BevelBorder(BevelBorder.LOWERED));
} else {
setBorder(new BevelBorder(BevelBorder.RAISED));
}
return this;
}
}
class OccurrencePanel extends JPanel{
Occurrence occurrence;
JLabel moduleTitleLabel = new JLabel();
JLabel occurrenceNumberLabel = new JLabel();
JLabel activityLabel = new JLabel();
JLabel timeLabel = new JLabel();
JLabel tutorLabel = new JLabel();
JLabel targetLabel = new JLabel();
JLabel actualLabel = new JLabel();
void setOccurrence(Occurrence occurrence){
this.occurrence = occurrence;
Module module = Main.modules.get(occurrence.getCode());
moduleTitleLabel.setText(String.format("<html>%s - %s %s</html>", module.getCode(), module.getCode(), module.getTitle()));
occurrenceNumberLabel.setText(Integer.toString(occurrence.getOccurrenceNumber()));
activityLabel.setText(occurrence.getActivityString());
timeLabel.setText(occurrence.getTime());
tutorLabel.setText(String.format("<html>%s</html>", "TUTOR")); //occurrence.getTutor()));
targetLabel.setText(Integer.toString(occurrence.getTargetStudents()));
actualLabel.setText(Integer.toString(occurrence.getActualStudents()));
}
OccurrencePanel(){
int height = 75;
Dimension bigLabelSize = new Dimension(200, height);
Dimension smallLabelSize = new Dimension(40, height);
Dimension activityLabelSize = new Dimension(75, height);
int padding = 10;
EmptyBorder paddingBorder = new EmptyBorder(0, padding, 0, padding);
moduleTitleLabel.setPreferredSize(bigLabelSize);
moduleTitleLabel.setBorder(paddingBorder);
occurrenceNumberLabel.setPreferredSize(smallLabelSize);
occurrenceNumberLabel.setBorder(paddingBorder);
activityLabel.setPreferredSize(activityLabelSize);
activityLabel.setBorder(paddingBorder);
timeLabel.setPreferredSize(bigLabelSize);
timeLabel.setBorder(paddingBorder);
tutorLabel.setPreferredSize(bigLabelSize);
tutorLabel.setBorder(paddingBorder);
targetLabel.setPreferredSize(smallLabelSize);
targetLabel.setBorder(paddingBorder);
targetLabel.setPreferredSize(smallLabelSize);
actualLabel.setBorder(paddingBorder);
setLayout(new GridBagLayout());
GridBagConstraints c = new GridBagConstraints();
c.gridx = 0;
c.gridy = 0;
add(moduleTitleLabel, c);
c.gridx = 1;
add(occurrenceNumberLabel, c);
c.gridx = 2;
add(activityLabel, c);
c.gridx = 3;
add(timeLabel, c);
c.gridx = 4;
add(tutorLabel, c);
c.gridx = 5;
add(targetLabel, c);
c.gridx = 6;
add(actualLabel, c);
}
}
Related
I'm working on a character creation panel for a role-playing game. It has a JPanel using GridBagLayout and within it a JPanel using FlowLayout.
Originally, when I didn't use FlowLayout it looked like this:
I needed to add another component on the x-axis. The weightx value would increase and become an even value. It would make all my titles off-centre and I didn't like that. I was thinking I could put some of my components inside a JPanel using FlowLayout, maybe wrap it in a JScrollPane or something nice:
Unfortunately the JPanel using FlowLayout is not being anchored by the JPanel using GridBagLayout. It went to the side of the display despite being set to anchor GridBagConstraints.BASELINE.
My Code:
public class TheLifeOfErnestRhodes extends JFrame {
private static JFrame frame = new JFrame("The Life of Ernest Rhodes");
private static Color black = new Color(40,40,40);
private static Color gold = new Color(255,223,0);
private static Color sienna = new Color(255,82,45);
private static Color stone = new Color(119,136,153);
private static Font titleFont = new Font("Serif", Font.BOLD + Font.ITALIC, 48);
private static Font textFont = new Font("Serif", Font.PLAIN, 20);
private static Font buttonFont = new Font("Serif", Font.BOLD + Font.ITALIC, 20);
private static void setFrame() {
frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
frame.setLocationRelativeTo(null);
frame.setExtendedState(JFrame.MAXIMIZED_BOTH);
frame.setResizable(false);
Container pane = frame.getContentPane();
JPanel backPanel = new JPanel();
backPanel.setBackground(black);
backPanel.setVisible(true);
pane.add(backPanel);
pane.add(charScreen());
frame.pack();
frame.setVisible(true);
}
public static void main(String[] args) {
javax.swing.SwingUtilities.invokeLater(new Runnable() {
public void run() {
setFrame();
}
});
}
private static JPanel charScreen() {
GridBagLayout layout = new GridBagLayout();
JPanel charScreen = new JPanel(layout);
charScreen.setBackground(black);
charScreen.setVisible(true);
//Static labels for the two headings/titles on this screen.
GridBagConstraints c = new GridBagConstraints();
c.gridx = 1;
c.gridy = 0;
c.anchor = GridBagConstraints.NORTH;
c.insets = new Insets(80,0,20,0);
JLabel heading = new JLabel("THE LIFE OF ERNEST RHODES");
heading.setForeground(gold);
heading.setFont(titleFont);
charScreen.add(heading, c);
c.gridy++;
c.anchor = GridBagConstraints.BASELINE;
c.insets = new Insets(0,0,10,0);
JLabel title = new JLabel("CHARACTER CREATION");
title.setForeground(stone);
title.setFont(titleFont);
charScreen.add(title, c);
c.gridy++;
c.insets = new Insets (10, 20, 10, 20);
JPanel namePanel = new JPanel(new FlowLayout());
namePanel.setComponentOrientation(ComponentOrientation.LEFT_TO_RIGHT);
JLabel labelName = new JLabel("FULL NAME:");
labelName.setForeground(stone);
labelName.setFont(textFont);
labelName.setVisible(true);
namePanel.add(labelName, c);
JTextField firstName = new JTextField("Taylor", 20);
firstName.setMinimumSize(firstName.getPreferredSize());
firstName.setBackground(black.darker());
firstName.setForeground(stone);
firstName.setFont(textFont);
firstName.setHorizontalAlignment(JTextField.CENTER);
firstName.setBorder(null);
firstName.setVisible(true);
namePanel.add(firstName);
JTextField lastName = new JTextField("Woodhouse", 20);
lastName.setMinimumSize(lastName.getPreferredSize());
lastName.setBackground(black.darker());
lastName.setForeground(stone);
lastName.setFont(textFont);
lastName.setHorizontalAlignment(JTextField.CENTER);
lastName.setBorder(null);
lastName.setVisible(true);
namePanel.add(lastName);
JLabel displayName = new JLabel("TYPE A NAME & PRESS 'ENTER'");
displayName.setForeground(stone);
displayName.setFont(textFont);
displayName.setVisible(true);
namePanel.add(displayName, c);
charScreen.add(namePanel);
c.gridx = 0;
c.gridy++;
c.fill = GridBagConstraints.NONE;
JLabel availablePts = new JLabel("AVAILABLE POINTS: 5");
availablePts.setForeground(stone);
availablePts.setFont(textFont);
availablePts.setVisible(true);
charScreen.add(availablePts, c);
c.gridx++;
JLabel allocatedPts = new JLabel("ALLOCATED POINTS:");
allocatedPts.setForeground(stone);
allocatedPts.setFont(textFont);
allocatedPts.setVisible(true);
charScreen.add(allocatedPts, c);
c.gridx++;
JLabel selectTrait = new JLabel("SELECT TRAITS:");
selectTrait.setForeground(stone);
selectTrait.setFont(textFont);
selectTrait.setVisible(true);
charScreen.add(selectTrait, c);
c.gridx = 0;
c.gridy++;
JLabel labelInv = new JLabel("Investigation");
labelInv.setForeground(gold);
labelInv.setFont(textFont);
labelInv.setVisible(true);
charScreen.add(labelInv, c);
c.gridy++;
JLabel labelPers = new JLabel("Persuasion");
labelPers.setForeground(gold);
labelPers.setFont(textFont);
labelPers.setVisible(true);
charScreen.add(labelPers, c);
c.gridy++;
JLabel LabelStl = new JLabel("Stealth");
LabelStl.setForeground(gold);
LabelStl.setFont(textFont);
LabelStl.setVisible(true);
charScreen.add(LabelStl, c);
c.gridx++;
c.gridy = 4;
JLabel allocatedInt = new JLabel("0");
allocatedInt.setForeground(stone);
allocatedInt.setFont(textFont);
allocatedInt.setVisible(true);
charScreen.add(allocatedInt, c);
c.gridy++;
JLabel allocatedPers = new JLabel("0");
allocatedPers.setForeground(stone);
allocatedPers.setFont(textFont);
allocatedPers.setVisible(true);
charScreen.add(allocatedPers, c);
c.gridy++;
JLabel allocatedAth = new JLabel("0");
allocatedAth.setForeground(stone);
allocatedAth.setFont(textFont);
allocatedAth.setVisible(true);
charScreen.add(allocatedAth, c);
c.gridx++;
c.gridy = 4;
JLabel keenEye = new JLabel("Keen Eye");
keenEye.setForeground(sienna);
keenEye.setFont(textFont);
keenEye.setVisible(true);
charScreen.add(keenEye, c);
c.gridy++;
JLabel interrogator = new JLabel("Interrogator");
interrogator.setForeground(gold);
interrogator.setFont(textFont);
interrogator.setVisible(true);
charScreen.add(interrogator, c);
c.gridy++;
JLabel sleuth = new JLabel("Sleuth");
sleuth.setForeground(gold);
sleuth.setFont(textFont);
sleuth.setVisible(true);
charScreen.add(sleuth, c);
c.gridx = 1;
c.gridy++;
JLabel reset = new JLabel("Reset Stats");
reset.setForeground(gold);
reset.setFont(textFont);
reset.setVisible(true);
charScreen.add(reset, c);
c.gridy++;
JLabel gender = new JLabel("GENDER:");
gender.setForeground(stone);
gender.setFont(textFont);
gender.setVisible(true);
charScreen.add(gender, c);
c.gridx = 0;
c.gridy++;
JLabel male = new JLabel("Male");
male.setForeground(gold);
male.setFont(textFont);
male.setVisible(true);
charScreen.add(male, c);
c.gridx++;
JLabel female = new JLabel("Female");
female.setForeground(gold);
female.setFont(textFont);
female.setVisible(true);
charScreen.add(female, c);
c.gridx++;
JLabel other = new JLabel("Other");
other.setForeground(sienna);
other.setFont(textFont);
other.setVisible(true);
charScreen.add(other, c);
c.gridx = 1;
c.gridy++;
c.anchor = GridBagConstraints.PAGE_END;
JLabel clickNext = new JLabel("Continue");
clickNext.setForeground(stone);
clickNext.setFont(titleFont);
clickNext.setVisible(true);
charScreen.add(clickNext, c);
}
}
Miscellaneous:
I tried doing the SSCCE thing. I couldn't bear the thought of someone running my code without the colors and fonts!
There are coloured JLabels used as 'buttons'. The Mac's button icons are really ugly so I went rogue. The above code is modified to only show the concerned components. In my program the JLabels have MouseListeners added to them.
If you're wondering about the game, it's a murder mystery and the player is the investigator! Obviously, they're investigating the life and death of 'Ernest Rhodes'.
Thank you all in advance!
Cheers,
Aadi
namePanel.add(labelName, c); is pointless, as namePanel is using a FlowLayout, passing it a GridBagLayoutConstraint is pointless as it's meaningless to FlowLayout
charScreen.add(namePanel); is effectively passing the "default" GridBagLayoutConstraint, meaning it will be laid out at the discretion of GridBagLayout, which isn't going to help you.
Maybe you meant charScreen.add(namePanel, c);, where c is the constraints you passed to namePanel
For example...
import java.awt.Color;
import java.awt.Container;
import java.awt.FlowLayout;
import java.awt.Font;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.WindowConstants;
public class TheLifeOfErnestRhodes extends JFrame {
private static JFrame frame = new JFrame("The Life of Ernest Rhodes");
private static Color black = new Color(40, 40, 40);
private static Color gold = new Color(255, 223, 0);
private static Color sienna = new Color(255, 82, 45);
private static Color stone = new Color(119, 136, 153);
private static Font titleFont = new Font("Serif", Font.BOLD + Font.ITALIC, 48);
private static Font textFont = new Font("Serif", Font.PLAIN, 20);
private static Font buttonFont = new Font("Serif", Font.BOLD + Font.ITALIC, 20);
private void setFrame() {
frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
frame.setLocationRelativeTo(null);
// frame.setExtendedState(JFrame.MAXIMIZED_BOTH);
// frame.setResizable(false);
Container pane = frame.getContentPane();
JPanel backPanel = new JPanel();
backPanel.setBackground(black);
backPanel.setVisible(true);
pane.add(backPanel);
pane.add(charScreen());
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
public static void main(String[] args) {
javax.swing.SwingUtilities.invokeLater(new Runnable() {
public void run() {
new TheLifeOfErnestRhodes().setFrame();
}
});
}
private JPanel charScreen() {
GridBagLayout layout = new GridBagLayout();
JPanel charScreen = new JPanel(layout);
charScreen.setBackground(black);
charScreen.setVisible(true);
//Static labels for the two headings/titles on this screen.
GridBagConstraints c = new GridBagConstraints();
c.gridx = 1;
c.gridy = 0;
c.anchor = GridBagConstraints.NORTH;
c.insets = new Insets(80, 0, 20, 0);
JLabel heading = new JLabel("THE LIFE OF ERNEST RHODES");
heading.setForeground(gold);
heading.setFont(titleFont);
charScreen.add(heading, c);
c.gridy++;
c.anchor = GridBagConstraints.BASELINE;
c.insets = new Insets(0, 0, 10, 0);
JLabel title = new JLabel("CHARACTER CREATION");
title.setForeground(stone);
title.setFont(titleFont);
charScreen.add(title, c);
c.gridy++;
c.insets = new Insets(10, 20, 10, 20);
// JPanel namePanel = new JPanel(new FlowLayout());
charScreen.add(new NamePane(), c);
c.gridx = 0;
c.gridy++;
c.fill = GridBagConstraints.NONE;
JLabel availablePts = new JLabel("AVAILABLE POINTS: 5");
availablePts.setForeground(stone);
availablePts.setFont(textFont);
availablePts.setVisible(true);
charScreen.add(availablePts, c);
c.gridx++;
JLabel allocatedPts = new JLabel("ALLOCATED POINTS:");
allocatedPts.setForeground(stone);
allocatedPts.setFont(textFont);
allocatedPts.setVisible(true);
charScreen.add(allocatedPts, c);
c.gridx++;
JLabel selectTrait = new JLabel("SELECT TRAITS:");
selectTrait.setForeground(stone);
selectTrait.setFont(textFont);
selectTrait.setVisible(true);
charScreen.add(selectTrait, c);
c.gridx = 0;
c.gridy++;
JLabel labelInv = new JLabel("Investigation");
labelInv.setForeground(gold);
labelInv.setFont(textFont);
labelInv.setVisible(true);
charScreen.add(labelInv, c);
c.gridy++;
JLabel labelPers = new JLabel("Persuasion");
labelPers.setForeground(gold);
labelPers.setFont(textFont);
labelPers.setVisible(true);
charScreen.add(labelPers, c);
c.gridy++;
JLabel LabelStl = new JLabel("Stealth");
LabelStl.setForeground(gold);
LabelStl.setFont(textFont);
LabelStl.setVisible(true);
charScreen.add(LabelStl, c);
c.gridx++;
c.gridy = 4;
JLabel allocatedInt = new JLabel("0");
allocatedInt.setForeground(stone);
allocatedInt.setFont(textFont);
allocatedInt.setVisible(true);
charScreen.add(allocatedInt, c);
c.gridy++;
JLabel allocatedPers = new JLabel("0");
allocatedPers.setForeground(stone);
allocatedPers.setFont(textFont);
allocatedPers.setVisible(true);
charScreen.add(allocatedPers, c);
c.gridy++;
JLabel allocatedAth = new JLabel("0");
allocatedAth.setForeground(stone);
allocatedAth.setFont(textFont);
allocatedAth.setVisible(true);
charScreen.add(allocatedAth, c);
c.gridx++;
c.gridy = 4;
JLabel keenEye = new JLabel("Keen Eye");
keenEye.setForeground(sienna);
keenEye.setFont(textFont);
keenEye.setVisible(true);
charScreen.add(keenEye, c);
c.gridy++;
JLabel interrogator = new JLabel("Interrogator");
interrogator.setForeground(gold);
interrogator.setFont(textFont);
interrogator.setVisible(true);
charScreen.add(interrogator, c);
c.gridy++;
JLabel sleuth = new JLabel("Sleuth");
sleuth.setForeground(gold);
sleuth.setFont(textFont);
sleuth.setVisible(true);
charScreen.add(sleuth, c);
c.gridx = 1;
c.gridy++;
JLabel reset = new JLabel("Reset Stats");
reset.setForeground(gold);
reset.setFont(textFont);
reset.setVisible(true);
charScreen.add(reset, c);
c.gridy++;
JLabel gender = new JLabel("GENDER:");
gender.setForeground(stone);
gender.setFont(textFont);
gender.setVisible(true);
charScreen.add(gender, c);
c.gridx = 0;
c.gridy++;
JLabel male = new JLabel("Male");
male.setForeground(gold);
male.setFont(textFont);
male.setVisible(true);
charScreen.add(male, c);
c.gridx++;
JLabel female = new JLabel("Female");
female.setForeground(gold);
female.setFont(textFont);
female.setVisible(true);
charScreen.add(female, c);
c.gridx++;
JLabel other = new JLabel("Other");
other.setForeground(sienna);
other.setFont(textFont);
other.setVisible(true);
charScreen.add(other, c);
c.gridx = 1;
c.gridy++;
c.anchor = GridBagConstraints.PAGE_END;
JLabel clickNext = new JLabel("Continue");
clickNext.setForeground(stone);
clickNext.setFont(titleFont);
clickNext.setVisible(true);
charScreen.add(clickNext, c);
return charScreen;
}
public class NamePane extends JPanel {
public NamePane() {
JLabel labelName = new JLabel("FULL NAME:");
labelName.setForeground(stone);
labelName.setFont(textFont);
labelName.setVisible(true);
add(labelName);
JTextField firstName = new JTextField("Taylor", 20);
// firstName.setMinimumSize(firstName.getPreferredSize());
firstName.setBackground(black.darker());
firstName.setForeground(stone);
firstName.setFont(textFont);
firstName.setHorizontalAlignment(JTextField.CENTER);
firstName.setBorder(null);
firstName.setVisible(true);
add(firstName);
JTextField lastName = new JTextField("Woodhouse", 20);
// lastName.setMinimumSize(lastName.getPreferredSize());
lastName.setBackground(black.darker());
lastName.setForeground(stone);
lastName.setFont(textFont);
lastName.setHorizontalAlignment(JTextField.CENTER);
lastName.setBorder(null);
lastName.setVisible(true);
add(lastName);
JLabel displayName = new JLabel("TYPE A NAME & PRESS 'ENTER'");
displayName.setForeground(stone);
displayName.setFont(textFont);
displayName.setVisible(true);
add(displayName);
}
}
}
package committeeGUI;
import static committeeGUI.CommitteeGUI.comList;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.FlowLayout;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.event.ActionEvent;
import javax.swing.BorderFactory;
import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;
public class StudentMemberFrame extends JFrame {
public StudentMemberFrame() {
super("Add Student");
setSize(450, 500);
setLocation(561, 150);
super.setResizable(false);
addStudentMember();
}
public void addStudentMember() {
CommitteeGUI.frame.setEnabled(false);
final JPanel showConsoleArea = new JPanel(new FlowLayout(FlowLayout.LEFT));
showConsoleArea.setLayout(new GridBagLayout());
GridBagConstraints c = new GridBagConstraints();
//creating border and size of the border
showConsoleArea.setBorder(BorderFactory.createLineBorder(Color.black, 3));
add(showConsoleArea); //, BorderLayout.CENTER);
//setting a size to showConsoleArea.
showConsoleArea.setSize(500, 500);
final JLabel lblheading = new JLabel("STUDENT");
// showConsoleArea.add(lblheading,BorderLayout.CENTER);
/*
* creating components of company form
*/
final JLabel lblCommitteeName = new JLabel("Committee name");
final JTextField txtName = new JTextField(15);
final JLabel lblMemberName = new JLabel("Student name");
final JTextField txtMemberName = new JTextField(15);
final JLabel lblMemberNumber = new JLabel("Student number");
final JTextField txtMemberNumber = new JTextField(15);
final JLabel lblMemberCourse = new JLabel("Student course");
final JTextField txtMemberCourse = new JTextField(15);
final JButton buttAdd = new JButton("SAVE");
final JButton buttCancel = new JButton("CANCEL");
// adding components to the display area
c.gridx = 1;
c.gridy = 0;
showConsoleArea.add(lblheading, c);
c.gridx = 0;
c.gridy = 1;
showConsoleArea.add(lblCommitteeName, c);
c.gridx = 1;
c.gridy = 1;
showConsoleArea.add(txtName, c);
c.gridx = 0;
c.gridy = 2;
showConsoleArea.add(lblMemberName, c);
c.gridx = 1;
c.gridy = 2;
showConsoleArea.add(txtMemberName, c);
c.gridx = 0;
c.gridy = 3;
showConsoleArea.add(lblMemberNumber, c);
c.gridx = 1;
c.gridy = 3;
showConsoleArea.add(txtMemberNumber, c);
c.gridx = 0;
c.gridy = 4;
showConsoleArea.add(lblMemberCourse, c);
c.gridx = 1;
c.gridy = 4;
showConsoleArea.add(txtMemberCourse, c);
c.gridx = 0;
c.gridy = 5;
showConsoleArea.add(buttAdd, c);
c.gridx = 1;
c.gridy = 5;
showConsoleArea.add(buttCancel, c);
/*
* able to displaying the company frame
*/
this.show();
buttAdd.addActionListener((ActionEvent e) -> {
if (txtName.getText().equals("")
|| txtMemberName.getText().equals("")
|| txtMemberNumber.getText().equals("")
|| txtMemberCourse.getText().equals("")) //validating the data
{
CommitteeGUI.frame.setEnabled(false);
setEnabled(false);
messagebox("Enter a valid data", 0);
return;
}
if (!txtMemberNumber.getText().matches("\\d+")) {
CommitteeGUI.frame.setEnabled(false);
setEnabled(false);
messagebox("Member number must be a integer", 0);
return;
}
for (Committee com : comList) {
if (com.getName().equals(txtName.getText())) {
Student st = new Student();
st.setName(txtMemberName.getText());
st.setAcademicNo(Integer.parseInt(txtMemberNumber.getText()));
st.setCourse(txtMemberCourse.getText());
com.memberList.add(st);
messagebox("Member added successfully", 1);
setEnabled(false);
return;
}
}
messagebox("No Committee found with given name", 1);
});
//creating ActionListner to Cancel button
buttCancel.addActionListener((ActionEvent e) -> {
//frame is enabled for user.
CommitteeGUI.frame.setEnabled(true);
dispose(); //disposing the frame
} //pass the action to actionPerformed method and perform it.
);
}
#SuppressWarnings("deprecation")
public void messagebox(String label, final int conform) {
final JDialog infoBox = new JDialog();//message box
infoBox.setSize(400, 90);
infoBox.setAlwaysOnTop(true);
infoBox.setResizable(false);
infoBox.setLocation(675, 258);
JLabel space = new JLabel(" ");
JLabel label1 = new JLabel(label);
JButton buttOk = new JButton("Ok");
buttOk.addActionListener((ActionEvent e) -> {
if (conform == 1) {
// making frame operation enable.
CommitteeGUI.frame.setEnabled(true);
dispose();
}
setEnabled(true);
infoBox.hide();
});
JPanel holder = new JPanel(new FlowLayout());
holder.add(label1);
holder.add(buttOk);
infoBox.add(holder);
infoBox.show();
}
}
Above is my code. I want to put space between the heading (STUDENT) and the fields.
Attached is the snapshot of the frame:
I am not familiar with this layout. Help is much appreciated.
public void addStudentMember() {
final JPanel showConsoleArea = new JPanel(new FlowLayout(FlowLayout.LEFT));
showConsoleArea.setLayout(new GridBagLayout());
GridBagConstraints c = new GridBagConstraints();
// Add below line of code change appropriate spacing
c.insets = new Insets(10, 10, 10, 10);
I'm trying to get the CardLayout working correctly. - I have the first "card" in my deck", which i've called firstPanel (Gridbaglayout). Inside that panel i want some other panels with the same layout (Gridbaglayout) which ofc has some components.
as example under here - I'm showing one of the JPanels with Gridbaglayout that i want inside my firstPanel (Jpanel) called textFieldForPlayers.
I hope you understand what i mean. if not i'll try to explain it more detailed. :)
public void run() {
deck.setLayout(cl);
c = new GridBagConstraints();
firstPanel.setLayout(new GridBagLayout());
secondPanel.setLayout(new GridBagLayout());
thirdPanel.setLayout(new GridBagLayout());
GamePanel gamePanel = new GamePanel();
c.gridx = 0;
c.gridy = 0;
firstPanel.add(textFieldForPlayers(humanPLayers), c);
c.gridx = 0;
c.gridy = 1;
firstPanel.add(botPreferences(), c);
c.gridx = 0;
c.gridy = 2;
firstPanel.add(next = new JButton("Next"), c);
c.gridx = 0;
c.gridy = 0;
secondPanel.add(new JLabel("Bot preferences"), c);
c.gridx = 0;
c.gridy = 0;
thirdPanel.add(gamePanel, c);
deck.add(firstPanel, "1");
deck.add(secondPanel, "2");
deck.add(thirdPanel, "3");
cl.show(deck, "1");
events();
}
private JPanel textFieldForPlayers(int hplayers) {
JPanel panel = new JPanel();
panel.setLayout(new GridBagLayout());
c = new GridBagConstraints();
JLabel text = new JLabel("Name of the human players");
c.gridx = 0;
c.gridy = 0;
panel.add(text, c);
boxes = new ArrayList<>();
boxes.add(new JTextField());
boxes.add(new JTextField());
boxes.add(new JTextField());
boxes.add(new JTextField());
boxes.add(new JTextField());
boxes.add(new JTextField());
for (int i = 1; i <= hplayers; i++) {
boxes.get(i).setPreferredSize(new Dimension(165, 18));
c.gridx = 1;
c.gridy = i;
panel.add(boxes.get(i), c);
c.gridx = 0;
c.gridy = i;
panel.add(new JLabel("Player " + i + ": "), c);
}
return panel;
}
Picture 3 - This is what it looks like now
Picture 4 - Should be - 1 in the top, 2 in the middle and 3 in the bottom. All of them centeret.
Your CardLayout, cl, is not behaving as a true CardLayout, suggesting something is wrong with code not shown. Myself, I try to modularize my gui creation, including using a separate utility method to help create gridbagconstraints if any complex constraints are needed.
For example:
import java.awt.BorderLayout;
import java.awt.CardLayout;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import java.awt.event.ActionEvent;
import java.util.ArrayList;
import java.util.List;
import javax.swing.*;
import javax.swing.border.Border;
#SuppressWarnings("serial")
public class GridBagEg extends JPanel {
public static final int PLAYER_COUNT = 5;
private CardLayout cardLayout = new CardLayout();
private JPanel deckPanel = new JPanel(cardLayout);
private NextAction nextAction = new NextAction("Next");
private PlayerPanel playerPanel = new PlayerPanel(PLAYER_COUNT);
private BotDifficultyPanel botDifficultyPanel = new BotDifficultyPanel();
public GridBagEg() {
deckPanel.add(playerPanel, PlayerPanel.NAME);
deckPanel.add(botDifficultyPanel, BotDifficultyPanel.NAME);
JPanel nextBtnPanel = new JPanel();
nextBtnPanel.add(new JButton(nextAction));
setLayout(new BorderLayout());
add(deckPanel, BorderLayout.CENTER);
add(nextBtnPanel, BorderLayout.PAGE_END);
}
private class NextAction extends AbstractAction {
public NextAction(String name) {
super(name);
int mnemonic = (int) name.charAt(0);
putValue(MNEMONIC_KEY, mnemonic);
}
#Override
public void actionPerformed(ActionEvent e) {
cardLayout.next(deckPanel);
}
}
private static void createAndShowGui() {
GridBagEg mainPanel = new GridBagEg();
JFrame frame = new JFrame("GridBagEg");
frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
frame.getContentPane().add(mainPanel);
frame.pack();
frame.setLocationByPlatform(true);
frame.setVisible(true);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(() -> createAndShowGui());
}
}
#SuppressWarnings("serial")
class BotDifficultyPanel extends JPanel {
public static final String NAME = "bot difficulty panel";
public static final String[] LEVELS = {"Easy", "Mid-level", "Difficult", "Holy Mother of God Difficulty"};
private JComboBox<String> difficultyCombo = new JComboBox<>(LEVELS);
public BotDifficultyPanel() {
setLayout(new GridBagLayout());
GridBagConstraints gbc = new GridBagConstraints();
gbc.gridx = 0;
gbc.gridy = 0;
add(new JLabel("Bot Difficulty:"), gbc);
gbc.gridx = 1;
gbc.insets = new Insets(0, 10, 0, 0);
add(difficultyCombo, gbc);
}
public String getSelectedDifficulty() {
String selection = (String) difficultyCombo.getSelectedItem();
return selection;
}
}
#SuppressWarnings("serial")
class PlayerPanel extends JPanel {
public static final String NAME = "player panel";
private static final String TITLE = "Name of Human Players";
private static final int EB_GAP = 10;
private static final int FIELD_COLUMNS = 15;
private static final int INS_GAP = 5;
private int playerMaxCount = 0;
private List<JTextField> playerFields = new ArrayList<>();
public PlayerPanel(int playerMaxCount) {
this.playerMaxCount = playerMaxCount;
Border outsideBorder = BorderFactory.createTitledBorder(TITLE);
Border insideBorder = BorderFactory.createEmptyBorder(EB_GAP, EB_GAP, EB_GAP, EB_GAP);
setBorder(BorderFactory.createCompoundBorder(outsideBorder, insideBorder));
setLayout(new GridBagLayout());
for (int i = 0; i < playerMaxCount; i++) {
JTextField playerField = new JTextField(FIELD_COLUMNS);
playerFields.add(playerField);
add(new JLabel("Player " + i + ":"), createGbc(0, i));
add(playerField, createGbc(1, i));
}
}
public String getFieldName(int index) {
if (index < 0 || index >= playerFields.size()) {
String text = "for playerFields index of " + index;
throw new IllegalArgumentException(text);
} else {
return playerFields.get(index).getText();
}
}
public int getPlayerMaxCount() {
return playerMaxCount;
}
private GridBagConstraints createGbc(int x, int y) {
GridBagConstraints gbc = new GridBagConstraints();
gbc.gridx = x;
gbc.gridy = y;
gbc.weightx = 1.0;
gbc.weighty = 1.0;
// if x is 0, anchor to the left otherwise to the right
gbc.anchor = x == 0 ? GridBagConstraints.WEST : GridBagConstraints.EAST;
gbc.fill = GridBagConstraints.HORIZONTAL;
gbc.insets = new Insets(INS_GAP, INS_GAP, INS_GAP, INS_GAP);
if (x == 0) {
gbc.insets.right = 4 * INS_GAP; // increase gap in between
}
return gbc;
}
}
Like:
CardLayout cl = new CardLayout();
JPanel contentPane = new JPanel();
JPanel firstPanel = new JPanel();
JPanel secondPanel = new JPanel();
contentPane.setlayout(cl);
firstPanel.add(new JButton("1"));
secondPanel.add(new JButton("2"));
contentPane.add(firstPanel, "1");
contentPane.add(secondPanel, "2");
cl.show(contentPane, "1");
So now the contentPane contains 2 JPanels inside it. and now we would be seeing everything on firstPanel right? :)
I am using GridBagLayout to design the interface. The interface has one JTabbedPane set at north and fill both directions as I resize, and just below the JTabbedPane there are two JButtons.
What I want to achieve is putting these two buttons at east with using only GridBagLayout capabilities (without introducing an extra JPanel), but I failed to do so.
|-[tab]--------------------------|
|---------------------------------|
|---------------------------------|
|---------------------------------|
|---------------------------------|
|-------------[button][button]|
When I set the layout constraint for both buttons to WEST (not EAST). Both go west correctly!
c.anchor = GridBagConstraints.WEST;
But when I set the layout constraint for both buttons to east
c.anchor = GridBagConstraints.EAST;
One of them go to east and the other go to west!
To solve this issue I added a JPanel which hold both buttons and added this JPanel into the interface, and set its layout constraint to c.anchor = GridBagConstraints.EAST;. It works well.
But is it possible to build the same GridBagLayout interface without using an extra JPanel as a container?
The following two classes are in SSCCE format; the first one show the problem GridBagTest, and the other show the solution GridBagTest_solved that make use of extra JPanel
Problem class:
import javax.swing.*;
import java.awt.*;
public class GridBagTest extends JPanel {
JFrame frame;
JTabbedPane tabbedPane;
JPanel panel_tab;
JButton btn_previous;
JButton btn_next;
private void create_and_layout() {
this.setLayout(new GridBagLayout());
tabbedPane = new JTabbedPane() {
#Override
public Dimension getPreferredSize() {
return new Dimension(300, 150);
}
};
panel_tab = new JPanel();
tabbedPane.addTab("Tab 1", panel_tab);
btn_previous = new JButton("previous");
btn_next = new JButton(" next ");
GridBagConstraints c;
c = new GridBagConstraints();
c.gridx = 0;
c.gridy = 0;
c.weightx = 1;
c.gridwidth = 2;
c.weighty = 1;
c.fill = GridBagConstraints.BOTH;
c.anchor = GridBagConstraints.NORTH;
this.add(tabbedPane, c);
c = new GridBagConstraints();
c.gridx = 0;
c.gridy = 1;
c.anchor = GridBagConstraints.EAST;
c.insets = new Insets(2, 0, 2, 2);
this.add(btn_previous, c);
c = new GridBagConstraints();
c.gridx = 1;
c.gridy = 1;
c.anchor = GridBagConstraints.EAST;
c.insets = new Insets(2, 0, 2, 2);
this.add(btn_next, c);
}
private void initGUI() {
create_and_layout();
frame = new JFrame("GridBagTest");
frame.getContentPane().add(this);
frame.pack();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}
public static void main(String[] args) {
java.awt.EventQueue.invokeLater(new GridBagTest()::initGUI);
}
}
Solution class:
import javax.swing.*;
import java.awt.*;
public class GridBagTest_solved extends JPanel {
JFrame frame;
JTabbedPane tabbedPane;
JPanel panel_tab;
JPanel panel_buttons;
JButton btn_previous;
JButton btn_next;
private void create_and_layout() {
this.setLayout(new GridBagLayout());
tabbedPane = new JTabbedPane() {
#Override
public Dimension getPreferredSize() {
return new Dimension(300, 150);
}
};
panel_tab = new JPanel();
tabbedPane.addTab("Tab 1", panel_tab);
panel_buttons = new JPanel(new GridBagLayout());
btn_previous = new JButton("previous");
btn_next = new JButton(" next ");
GridBagConstraints c;
// Adding buttons to panel_buttons
c = new GridBagConstraints();
c.gridx = 0;
c.gridy = 0;
c.insets = new Insets(2, 0, 2, 2);
panel_buttons.add(btn_previous, c);
c = new GridBagConstraints();
c.gridx = 1;
c.gridy = 0;
c.insets = new Insets(2, 0, 2, 2);
panel_buttons.add(btn_next, c);
// Adding tabbedPane & panel_buttons to this (GridBagTest_solved)
c = new GridBagConstraints();
c.gridx = 0;
c.gridy = 0;
c.weightx = 1;
c.weighty = 1;
c.fill = GridBagConstraints.BOTH;
c.anchor = GridBagConstraints.NORTH;
this.add(tabbedPane, c);
c = new GridBagConstraints();
c.gridx = 0;
c.gridy = 1;
c.anchor = GridBagConstraints.EAST;
this.add(panel_buttons, c);
}
private void initGUI() {
create_and_layout();
frame = new JFrame("GridBagTest_solved");
frame.getContentPane().add(this);
frame.pack();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}
public static void main(String[] args) {
java.awt.EventQueue.invokeLater(new GridBagTest_solved()::initGUI);
}
}
If you only have the three components - the JTabbedPane and two JButtons, you should consider using a simpler layout than GridBag. Just use a BorderLayout for the main panel, placing the JTabbedPane in CENTER, and a JPanel in SOUTH that has a FlowLayout with alignment of TRAILING, then just add the two buttons to that JPanel.
I'm not exactly new to java (I've been using it for a year now) but this is my first go at swing. I'm trying to make a very simple chat client to learn both socket and swing at once. My question is "What must I do to align my panels correctly?". I've tried a lot of things (Though I don't have it in my code). Usually I work something like this out on my own, but I'm to the point I need to ask for help. Do I need to change the wieghtx, weighty? What I want the client to look like is something like this.
This is what it currently looks like.
Here is my code.
package com.client.core;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class Window extends JFrame{
private int screenWidth = 800;
private int screenHeight = 600;
public Window(){
//Initial Setup
super("NAMEHERE - Chat Client Alpha v0.0.1");
setResizable(true);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setSize(screenWidth,screenHeight);
GridBagConstraints c = new GridBagConstraints();
//Main Panel
JPanel window = new JPanel();
window.setLayout(new GridBagLayout());
window.setBackground(Color.black);
//Panels
JPanel display = new JPanel();
JPanel chat = new JPanel();
chat.setLayout(new GridBagLayout());
JPanel users = new JPanel();
display.setBackground(Color.blue);
c.gridx = 0;
c.gridy = 0;
c.insets= new Insets(5,5,5,5);
window.add(display, c);
chat.setBackground(Color.red);
c.gridx = 0;
c.gridy = 3;
c.gridheight = 2;
c.gridwidth = 1;
c.insets= new Insets(5,5,5,5);
window.add(chat, c);
users.setBackground(Color.green);
c.gridx = 2;
c.gridy = 0;
c.insets= new Insets(5,5,5,5);
window.add(users, c);
//Buttons
//Text fields
JTextArea text = new JTextArea("DEREADFADSFEWFASDFSADFASDF");
c.gridx = 0;
c.gridy = 0;
chat.add(text);
JTextField input = new JTextField("type here to chat", 50);
c.gridx = 0;
c.gridy = 1;
c.insets= new Insets(5,5,5,5);
chat.add(input);
add(window);
}
static class ActLis implements ActionListener{
#Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
}
}
}
If you wanted something like this as an output :
You can take help from this code example, though you can remove the last ButtonPanel if you don't need that :
package to.uk.gagandeepbali.swing.messenger.gui;
import java.awt.BorderLayout;
import java.awt.GridLayout;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Color;
import javax.swing.BorderFactory;
import javax.swing.JButton;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextPane;
import javax.swing.JTextField;
public class ChatPanel extends JPanel
{
private JButton backButton;
private JButton exitButton;
private JButton sendButton;
private JTextPane chatPane;
private JTextPane namePane;
private JTextField chatField;
private GridBagConstraints gbc;
private final int GAP = 10;
private final int SMALLGAP = 1;
public ChatPanel()
{
gbc = new GridBagConstraints();
}
protected void createGUI()
{
setOpaque(true);
setBackground(Color.WHITE);
setLayout(new BorderLayout(5, 5));
JPanel centerPanel = new JPanel();
centerPanel.setOpaque(true);
centerPanel.setBackground(Color.WHITE);
centerPanel.setBorder(BorderFactory.createEmptyBorder(GAP, GAP, 0, GAP));
centerPanel.setLayout(new GridBagLayout());
gbc.gridx = 0;
gbc.gridy = 0;
gbc.gridwidth = 5;
gbc.weightx = 0.8;
gbc.weighty = 1.0;
gbc.fill = GridBagConstraints.BOTH;
gbc.anchor = GridBagConstraints.FIRST_LINE_START;
chatPane = new JTextPane();
JScrollPane scrollerChat = new JScrollPane();
scrollerChat.setBorder(BorderFactory.createTitledBorder("Chat"));
scrollerChat.setViewportView(chatPane);
centerPanel.add(scrollerChat, gbc);
gbc.gridx = 5;
gbc.gridwidth = 2;
gbc.weightx = 0.2;
namePane = new JTextPane();
JScrollPane scrollerName = new JScrollPane(namePane);
scrollerName.setBorder(BorderFactory.createTitledBorder("Names"));
centerPanel.add(scrollerName, gbc);
gbc.gridx = 0;
gbc.gridy = 5;
gbc.gridwidth = 5;
gbc.weightx = 0.8;
gbc.weighty = 0.1;
gbc.fill = GridBagConstraints.HORIZONTAL;
chatField = new JTextField();
chatField.setOpaque(true);
chatField.setBorder(BorderFactory.createCompoundBorder(
BorderFactory.createTitledBorder("")
, BorderFactory.createEmptyBorder(SMALLGAP, SMALLGAP, SMALLGAP, SMALLGAP)));
centerPanel.add(chatField, gbc);
gbc.gridx = 5;
gbc.gridwidth = 2;
gbc.weightx = 0.2;
sendButton = new JButton("Send");
sendButton.setBorder(BorderFactory.createTitledBorder(""));
centerPanel.add(sendButton, gbc);
JPanel bottomPanel = new JPanel();
bottomPanel.setOpaque(true);
bottomPanel.setBackground(Color.WHITE);
bottomPanel.setBorder(
BorderFactory.createTitledBorder(""));
bottomPanel.setLayout(new BorderLayout());
JPanel buttonPanel = new JPanel();
buttonPanel.setOpaque(true);
buttonPanel.setBackground(Color.WHITE);
buttonPanel.setBorder(BorderFactory.createEmptyBorder(GAP, GAP, 0, GAP));
backButton = new JButton("Back");
exitButton = new JButton("Exit");
buttonPanel.add(backButton);
buttonPanel.add(exitButton);
bottomPanel.add(buttonPanel, BorderLayout.CENTER);
add(centerPanel, BorderLayout.CENTER);
add(bottomPanel, BorderLayout.PAGE_END);
}
public JTextPane getChatPane()
{
return chatPane;
}
public JTextPane getNamePane()
{
return namePane;
}
public JTextField getChatField()
{
return chatField;
}
public JButton getExitButton()
{
return exitButton;
}
public JButton getBackButton()
{
return backButton;
}
public JButton getSendButton()
{
return sendButton;
}
}
What you could do, and probably gives the desired result
JPanel somethingHere = ...;
JPanel chat = ...;
JPanel userList = ...;
JPanel leftPanel = new JPanel( new BorderLayout() );
leftPanel.add( somethingHere, BorderLayout.CENTER );
leftPanel.add( chat, BorderLayout.SOUTH );
JPanel total = new JPanel( new BorderLayout() );
total.add( leftPanel, BorderLayout.CENTER );
total.add( userList, BorderLayout.EAST );
Way simpler then messing with GridBagLayout
Here is what I came out with thus far. The red box is where I plan to add a simple 2D avatar interface with LWJGL.
Here is the code for it
package com.client.core;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.DocumentEvent;
import javax.swing.event.DocumentListener;
public class Window extends JFrame{
private int screenWidth = 800;
private int screenHeight = 600;
public Window(){
//Initial Setup
super("NAMEHERE - Chat Client Alpha v0.0.1");
setResizable(true);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setSize(screenWidth,screenHeight);
//Main Panels
JPanel window = new JPanel(new BorderLayout());
JPanel center = new JPanel(new BorderLayout());
JPanel right = new JPanel(new BorderLayout());
//Panels
JPanel display = new JPanel( new BorderLayout());
display.setBackground(Color.red);
JPanel chat = new JPanel();
chat.setLayout(new BoxLayout(chat, BoxLayout.Y_AXIS));
chat.setBackground(Color.blue);
JPanel users = new JPanel(new BorderLayout());
users.setBackground(Color.green);
//TextFields
JTextArea chatBox = new JTextArea("Welcome to the chat!", 7,50);
chatBox.setEditable(false);
JTextField chatWrite = new JTextField();
JScrollPane userList = new JScrollPane();
JTextField userSearch = new JTextField(10);
userList.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
users.add(userList);
users.add(userSearch, BorderLayout.NORTH);
chat.add(chatBox);
chat.add(chatWrite);
chat.setBorder(BorderFactory.createEmptyBorder(1, 1, 1, 1));
//Menu bar
JMenuBar menu = new JMenuBar();
JMenu file = new JMenu("File");
JMenuItem exit = new JMenuItem("Exit");
JMenuItem ipconnect = new JMenuItem("Connect to IP");
file.add(ipconnect);
file.add(exit);
menu.add(file);
//Main window adding
right.add(users);
center.add(display, BorderLayout.CENTER);
center.add(chat, BorderLayout.SOUTH);
window.add(center, BorderLayout.CENTER);
window.add(right, BorderLayout.EAST);
window.add(menu, BorderLayout.NORTH);
add(window);
//Listeners
chatWrite.addKeyListener(new KeyLis());
ipconnect.addActionListener(new ActLis());
exit.addActionListener(new ActLis());
}
static class KeyLis implements KeyListener{
#Override
public void keyPressed(KeyEvent e) {
if(e.getKeyCode() == KeyEvent.VK_ENTER){
System.out.println("Message recieved.");
}
}
#Override
public void keyReleased(KeyEvent e) {
// TODO Auto-generated method stub
}
#Override
public void keyTyped(KeyEvent e) {
// TODO Auto-generated method stub
}
}
static class ActLis implements ActionListener{
#Override
public void actionPerformed(ActionEvent e) {
if(e.getActionCommand() == "Exit"){
System.exit(0);
} else if(e.getActionCommand() == "Connect to IP"){
System.out.println("Connecting....");
JFrame frameip = new JFrame();
JPanel panelip = new JPanel();
JButton buttonip = new JButton("Hello");
frameip.add(panelip);
panelip.add(buttonip);
JDialog ippop = new JDialog(frameip, "Enter IP", false);
}
}
}
}
I had to build a similar layout using a GridBagLayout. The code below shows how I achieved it.
import java.awt.Color;
import java.awt.FlowLayout;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class GridBagLayoutTest {
public GridBagLayoutTest() {
JFrame jframe = new JFrame();
jframe.setLayout(new GridBagLayout());
jframe.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
jframe.setSize(800, 600);
jframe.setVisible(true);
// Left
JPanel leftPanel = new JPanel(new GridBagLayout());
leftPanel.setBackground(Color.YELLOW);
GridBagConstraints gridBagConstraints = new GridBagConstraints();
gridBagConstraints.fill = GridBagConstraints.BOTH;
gridBagConstraints.weightx = .7f;
gridBagConstraints.weighty = 1f;
gridBagConstraints.gridx = 0;
gridBagConstraints.gridy = 0;
jframe.add(leftPanel, gridBagConstraints);
JPanel leftTopPanel = new JPanel(new FlowLayout());
leftTopPanel.setBackground(Color.RED);
GridBagConstraints gridBagConstraints0 = new GridBagConstraints();
gridBagConstraints0.fill = GridBagConstraints.BOTH;
gridBagConstraints0.weightx = 1f;
gridBagConstraints0.weighty = .7f;
gridBagConstraints0.gridx = 0;
gridBagConstraints0.gridy = 0;
leftPanel.add(leftTopPanel, gridBagConstraints0);
JPanel leftMiddlePanel = new JPanel(new FlowLayout());
leftMiddlePanel.setBackground(Color.BLACK);
gridBagConstraints0 = new GridBagConstraints();
gridBagConstraints0.fill = GridBagConstraints.BOTH;
gridBagConstraints0.weightx = 1f;
gridBagConstraints0.weighty = .2f;
gridBagConstraints0.gridx = 0;
gridBagConstraints0.gridy = 1;
leftPanel.add(leftMiddlePanel, gridBagConstraints0);
JPanel leftBottomBottomPanel = new JPanel(new FlowLayout());
leftBottomBottomPanel.setBackground(Color.PINK);
gridBagConstraints0 = new GridBagConstraints();
gridBagConstraints0.fill = GridBagConstraints.BOTH;
gridBagConstraints0.weightx = 1f;
gridBagConstraints0.weighty = .1f;
gridBagConstraints0.gridx = 0;
gridBagConstraints0.gridy = 2;
leftPanel.add(leftBottomBottomPanel, gridBagConstraints0);
// Right
JPanel rightPanel = new JPanel();
rightPanel.setBackground(Color.GREEN);
gridBagConstraints = new GridBagConstraints();
gridBagConstraints.fill = GridBagConstraints.BOTH;
gridBagConstraints.weightx = .3f;
gridBagConstraints.weighty = 1f;
gridBagConstraints.gridx = 1;
gridBagConstraints.gridy = 0;
jframe.add(rightPanel, gridBagConstraints);
}
public static void main (String args[]) {
new GridBagLayoutTest();
}