Why can't java applets run on eclipse?

Your program is missing set visible (true); Add this sentence, and add cp.add (layout.west, new jbutton(" 4))；); And CP.add (layout.center, new jbutton(" 5))；); You can run it by adding quotation marks. The complete process is as follows:

Import javax.swing. *;

Import java.awt. *;

The public class BorderLayout 1 extends JApplet.

{

Public void init ()

{

container CP = getContentPane()；

BorderLayout layout = New Borderlayout (0,0);

Cp.add (layout. NORTH，new JButton(" 1 "))；

Cp.add (layout. South, new JButton(" 2 "))；);

Cp.add (layout. East, new JButton(" 3 "))；);

Cp.add (layout. West, new JButton(" 4 "))；);

Cp.add (layout. CENTER，new JButton(" 5 "))；

set visible(true)；

}

}