// FlowLayoutDemo.java // Demonstrating FlowLayout alignments. import java.awt.*; import java.awt.event.*; import javax.swing.*; public class FlowLayoutDemo extends JFrame { private JButton left, center, right; private Container c; private FlowLayout layout; public FlowLayoutDemo() { super( "FlowLayout Demo" ); layout = new FlowLayout(); c = getContentPane(); c.setLayout( layout ); left = new JButton( "Left" ); left.addActionListener( new ActionListener() { public void actionPerformed( ActionEvent e ) { layout.setAlignment( FlowLayout.LEFT ); // re-align attached components layout.layoutContainer( c ); } } ); c.add( left ); center = new JButton( "Center" ); center.addActionListener( new ActionListener() { public void actionPerformed( ActionEvent e ) { layout.setAlignment( FlowLayout.CENTER ); // re-align attached components layout.layoutContainer( c ); } } ); c.add( center ); right = new JButton( "Right" ); right.addActionListener( new ActionListener() { public void actionPerformed( ActionEvent e ) { layout.setAlignment( FlowLayout.RIGHT ); // re-align attached components layout.layoutContainer( c ); } } ); c.add( right ); setSize( 300, 75 ); show(); } public static void main( String args[] ) { FlowLayoutDemo app = new FlowLayoutDemo(); app.addWindowListener( new WindowAdapter() { public void windowClosing( WindowEvent e ) { System.exit( 0 ); } } ); } }
import java.awt.*; import java.awt.event.*; import javax.swing.*; public class FlowWindow extends JFrame { boolean inAnApplet = true; public FlowWindow() { Container contentPane = getContentPane(); contentPane.setLayout(new FlowLayout()); contentPane.add(new JButton("Button 1")); contentPane.add(new JButton("2")); contentPane.add(new JButton("Button 3")); contentPane.add(new JButton("Long-Named Button 4")); contentPane.add(new JButton("Button 5")); addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent e) { if (inAnApplet) { dispose(); } else { System.exit(0); } } }); } public static void main(String args[]) { FlowWindow window = new FlowWindow(); window.inAnApplet = false; window.setTitle("FlowLayout"); window.pack(); window.setVisible(true); } }
Maintained by John Loomis, last updated 15 June 2000