Using a Separator Outside of a Menu

We’ve already seen how a separator can be used in menus to highlight the grouping of menu items. However, separators are components in themselves and can be used for a variety of tasks. Here is a program that adds a separator between a series of buttons:

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.border.*;

public class SeparatorExample extends JPanel {

    public SeparatorExample( ) {
        super(true);

        setLayout(new BoxLayout(this, BoxLayout.Y_AXIS));
        Box box1 = new Box(BoxLayout.X_AXIS);
        Box box2 = new Box(BoxLayout.X_AXIS);
        Box box3 = new Box(BoxLayout.X_AXIS);

        box1.add(new JButton("Press Me"));
        box1.add(new JButton("No Me!"));
        box1.add(new JButton("Ignore Them!"));
        box2.add(new JSeparator( ));
        box3.add(new JButton("I'm the Button!"));
        box3.add(new JButton("It's me!"));
        box3.add(new JButton("Go Away!"));

        add(box1);
        add(box2);
        add(box3);
    }

    public static void main(String s[]) {

        SeparatorExample example = new SeparatorExample( );

        JFrame frame = new JFrame("Separator Example");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setContentPane(example);
        frame.pack( );
        frame.setVisible(true);
    }
}