11. A2 Adding JPanel

JPanels are containers that are

• automatically double buffered

• repainted more quickly and smoothly.

It is recommended that a program

1. creates a simple JPanel

2. adds the panel to JFrame object

3. adds all other components to the panel object.

For example,

    JPanel jpan = new JPanel();
    frame.getContentPane().add( jpan );
    JButton jbut = new JButton( "Hello" );
    jpan.add( jbut );

See next slide for a complete program.