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); } }