Ejercicio 14.15.java

// Fig. 14.15: BoxLayoutDemo.java      
// Demonstrating BoxLayout.

importjava.awt.*;      
importjava.awt.event.*;     
importjavax.swing.*;

publicclassBoxLayoutDemo extendsJFrame {   
// set up GUI  
publicBoxLayoutDemo()   
{
super( "Demostrating BoxLayout");
// create Box containers with BoxLayout15
Box horizontal1 = Box.createHorizontalBox();
Box vertical1 = Box.createVerticalBox();
Box horizontal2 = Box.createHorizontalBox();
Box vertical2 = Box.createVerticalBox();  
finalintSIZE= 3; // number of buttons on each Box
// add buttons to Box horizontal1
for( intcount = 0; count < SIZE; count++ )
horizontal1.add( newJButton( "Button "+ count ) )
// create strut and add buttons to Box vertical1
   for( intcount = 0; count < SIZE; count++ ) {
        vertical1.add( Box.createVerticalStrut( 25) );
        vertical1.add( newJButton( "Button "+ count ) );
     }
        // create horizontal glue and add buttons to Box horizontal2
    for( intcount = 0; count < SIZE; count++ ) {
        horizontal2.add( Box.createHorizontalGlue() );
        horizontal2.add( newJButton( "Button "+ count ) );
     }  
     // create rigid area and add buttons to Box vertical2
        for( intcount = 0; count < SIZE; count++ ) {
        vertical2.add( Box.createRigidArea( newDimension( 12, 8) ) );
        vertical2.add( newJButton( "Button "+ count ) ); 
     }
     // create vertical glue and add buttons to panel
        JPanel panel = newJPanel();
        panel.setLayout( newBoxLayout( panel, BoxLayout.Y_AXIS) );
        for( intcount = 0; count < SIZE; count++ ) {   
         panel.add( Box.createGlue() );     
         panel.add( newJButton( "Button "+ count ) );
        }
        // create a JTabbedPane
         JTabbedPane tabs = newJTabbedPane(JTabbedPane.TOP, JTabbedPane.SCROLL_TAB_LAYOUT);
        // place each container on tabbed pane
        tabs.addTab( "Horizontal Box", horizontal1 );
        tabs.addTab( "Vertical Box with Struts", vertical1 );
        tabs.addTab( "Horizontal Box with Glue", horizontal2 );
        tabs.addTab( "Vertical Box with Rigid Areas", vertical2 );
        tabs.addTab( "Vertical Box with Glue", panel );
        
        getContentPane().add( tabs );  
        // place tabbed pane on content pane
         
        setSize( 400, 220);
        setVisible( true);  
    } // end constructor 

    publicstaticvoidmain( String args[] )
    {
       BoxLayoutDemo application = newBoxLayoutDemo();
       application.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE);
    }    

} // end class BoxLayoutDemo