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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.*;
public final class MainPanel extends JPanel {
private MainPanel() {
super(new BorderLayout());
JCheckBox check = new JCheckBox("Always On Top", true);
check.addActionListener(e -> {
JCheckBox c = (JCheckBox) e.getSource();
Container w = c.getTopLevelAncestor();
if (w instanceof Window) {
((Window) w).setAlwaysOnTop(c.isSelected());
}
});
JPanel p = new JPanel();
p.add(check);
p.setBorder(BorderFactory.createTitledBorder("JFrame#setAlwaysOnTop(boolean)"));
add(p, BorderLayout.NORTH);
setBorder(BorderFactory.createEmptyBorder(5, 5, 5, 5));
setPreferredSize(new Dimension(320, 240));
}
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.setAlwaysOnTop(true);
frame.getContentPane().add(new MainPanel());
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
}