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MainPanel.java
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/
MainPanel.java
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// -*- mode:java; encoding:utf-8 -*-
// vim:set fileencoding=utf-8:
// @homepage@
package example;
import java.awt.*;
import javax.swing.*;
import javax.swing.event.DocumentEvent;
import javax.swing.event.DocumentListener;
public final class MainPanel extends JPanel {
private final JTextArea log = new JTextArea();
private MainPanel() {
super(new BorderLayout());
JButton button = new JButton("JButton");
button.addActionListener(e -> append("JButton clicked"));
JCheckBox check = new JCheckBox("setDefaultButton");
check.addActionListener(e -> button.getRootPane().setDefaultButton(button));
JTextField textField1 = new JTextField("addDocumentListener");
textField1.getDocument().addDocumentListener(new DocumentListener() {
@Override public void insertUpdate(DocumentEvent e) {
append("insertUpdate");
}
@Override public void removeUpdate(DocumentEvent e) {
append("removeUpdate");
}
@Override public void changedUpdate(DocumentEvent e) {
/* not needed */
}
});
JTextField textField2 = new JTextField("addActionListener");
textField2.addActionListener(e -> append(((JTextField) e.getSource()).getText()));
Box box = Box.createVerticalBox();
box.setBorder(BorderFactory.createEmptyBorder(10, 10, 10, 10));
box.add(new JTextField("JTextField"));
box.add(Box.createVerticalStrut(10));
box.add(textField1);
box.add(Box.createVerticalStrut(10));
box.add(textField2);
JPanel p = new JPanel(new FlowLayout(FlowLayout.RIGHT));
p.add(check);
p.add(button);
add(box, BorderLayout.NORTH);
add(new JScrollPane(log));
add(p, BorderLayout.SOUTH);
setPreferredSize(new Dimension(320, 240));
}
public void append(String text) {
log.append(text + "\n");
log.setCaretPosition(log.getDocument().getLength());
}
public static void main(String[] args) {
EventQueue.invokeLater(MainPanel::createAndShowGui);
}
private static void createAndShowGui() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (UnsupportedLookAndFeelException ignored) {
Toolkit.getDefaultToolkit().beep();
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException ex) {
ex.printStackTrace();
return;
}
JFrame frame = new JFrame("@title@");
frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
frame.getContentPane().add(new MainPanel());
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
}