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import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.LayoutManager;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.OverlayLayout;
public class OverlaySampleCentral {
public static void main(String args[]) {
JFrame frame = new JFrame("Overlay Example");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JPanel panel = new JPanel() {
public boolean isOptimizedDrawingEnabled() {
return false;
}
};
LayoutManager overlay = new OverlayLayout(panel);
panel.setLayout(overlay);
JButton button = new JButton("Small");
button.setMaximumSize(new Dimension(25, 25));
button.setBackground(Color.white);
button.setAlignmentX(0.5f);
button.setAlignmentY(0.5f);
panel.add(button);
button = new JButton("Medium");
button.setMaximumSize(new Dimension(50, 50));
button.setBackground(Color.gray);
button.setAlignmentX(0.5f);
button.setAlignmentY(0.5f);
panel.add(button);
button = new JButton("Large");
button.setMaximumSize(new Dimension(100, 100));
button.setBackground(Color.black);
button.setAlignmentX(0.5f);
button.setAlignmentY(0.5f);
panel.add(button);
frame.add(panel, BorderLayout.CENTER);
frame.setSize(400, 300);
frame.setVisible(true);
}
}
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