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BoxLayout Demo 3

import java.awt.BorderLayout; import java.awt.Container; import java.awt.GridLayout; import javax.swing.BorderFactory; import javax.swing.Box; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JPanel; public class StrutSample {   public static void main(String args[]) {     Box horizontalBox;     JPanel panel;     JFrame frame = new JFrame("Horizontal Strut");     frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);     Container contentPane = frame.getContentPane();     contentPane.setLayout(new GridLayout(0, 1));     horizontalBox = Box.createHorizontalBox();     horizontalBox.add(Box.createHorizontalStrut(10));     horizontalBox.add(new JButton("Left"));     horizontalBox.add(new JButton("Middle"));     horizontalBox.add(new JButton("Right"));     panel = new JPanel(new BorderLayout());     panel.add(horizontalBox);     panel.setBorder(BorderFactory.createTitledBorder("Beginning Strut"));     contentPane.add(panel);     horizontalBox = Box.createHorizontalBox();     horizontalBox.add(new JButton("Left"));     horizontalBox.add(Box.createHorizontalStrut(10));     horizontalBox.add(new JButton("Middle"));     horizontalBox.add(Box.createHorizontalStrut(25));     horizontalBox.add(new JButton("Right"));     panel = new JPanel(new BorderLayout());     panel.add(horizontalBox);     panel.setBorder(BorderFactory.createTitledBorder("2 Middle Struts"));     contentPane.add(panel);     horizontalBox = Box.createHorizontalBox();     horizontalBox.add(Box.createHorizontalStrut(25));     horizontalBox.add(new JButton("Left"));     horizontalBox.add(new JButton("Middle"));     horizontalBox.add(new JButton("Right"));     horizontalBox.add(Box.createHorizontalStrut(10));     panel = new JPanel(new BorderLayout());     panel.add(horizontalBox);     panel.setBorder(BorderFactory         .createTitledBorder("Beginning/End Struts"));     contentPane.add(panel);     horizontalBox = Box.createHorizontalBox();     horizontalBox.add(new JButton("Left"));     horizontalBox.add(new JButton("Middle"));     horizontalBox.add(new JButton("Right"));     panel = new JPanel(new BorderLayout());     horizontalBox.add(Box.createHorizontalStrut(10));     panel.add(horizontalBox);     panel.setBorder(BorderFactory.createTitledBorder("End Strut"));     contentPane.add(panel);     frame.setSize(300, 300);     frame.setVisible(true);   } }