65 lines
1.2 KiB
Java
65 lines
1.2 KiB
Java
Grid Layout Demo
|
|
|
|
import java.awt.*;
|
|
import java.awt.event.*;
|
|
import javax.swing.*;
|
|
|
|
public class GridLayoutDemo extends JFrame
|
|
implements ActionListener {
|
|
private JButton b[];
|
|
private String names[] =
|
|
{ "one", "two", "three", "four", "five", "six" };
|
|
private boolean toggle = true;
|
|
private Container c;
|
|
private GridLayout grid1, grid2;
|
|
|
|
public GridLayoutDemo()
|
|
{
|
|
super( "GridLayout Demo" );
|
|
|
|
grid1 = new GridLayout( 2, 3, 5, 5 );
|
|
grid2 = new GridLayout( 3, 2 );
|
|
|
|
c = getContentPane();
|
|
c.setLayout( grid1 );
|
|
|
|
// create and add buttons
|
|
b = new JButton[ names.length ];
|
|
|
|
for (int i = 0; i < names.length; i++ ) {
|
|
b[ i ] = new JButton( names[ i ] );
|
|
b[ i ].addActionListener( this );
|
|
c.add( b[ i ] );
|
|
}
|
|
|
|
setSize( 300, 150 );
|
|
show();
|
|
}
|
|
|
|
public void actionPerformed( ActionEvent e )
|
|
{
|
|
if ( toggle )
|
|
c.setLayout( grid2 );
|
|
else
|
|
c.setLayout( grid1 );
|
|
|
|
toggle = !toggle;
|
|
c.validate();
|
|
}
|
|
|
|
public static void main( String args[] )
|
|
{
|
|
GridLayoutDemo app = new GridLayoutDemo();
|
|
|
|
app.addWindowListener(
|
|
new WindowAdapter() {
|
|
|
|
public void windowClosing( WindowEvent e )
|
|
{
|
|
System.exit( 0 );
|
|
}
|
|
}
|
|
);
|
|
}
|
|
}
|