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import java.awt.Dimension;
import java.awt.Insets;
import javax.swing.Box;
import javax.swing.BoxLayout;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.border.EmptyBorder;
public class RigidArea {
public static void main(String[] args) {
JPanel panel = new JPanel();
panel.setLayout(new BoxLayout(panel, BoxLayout.Y_AXIS));
panel.setBorder(new EmptyBorder(new Insets(40, 60, 40, 60)));
panel.add(new JButton("Button"));
panel.add(Box.createRigidArea(new Dimension(0, 5)));
panel.add(new JButton("Button"));
panel.add(Box.createRigidArea(new Dimension(0, 5)));
panel.add(new JButton("Button"));
panel.add(Box.createRigidArea(new Dimension(0, 5)));
panel.add(new JButton("Button"));
JFrame f = new JFrame();
f.add(panel);
f.pack();
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.setLocationRelativeTo(null);
f.setVisible(true);
}
}
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