try this oo way, not other po way. :)

import javax.swing.*;
import java.awt.*;
class mybutton extends JButton
{
mybutton(String name)
{
super(name); //JButton jb=new JButton(name);
setBackground(Color.red);
setForeground(Color.white);
setBorder(new javax.swing.border.CompoundBorder(new
javax.swing.border.SoftBevelBorder
(javax.swing.border.BevelBorder.RAISED), new
javax.swing.border.BevelBorder
(javax.swing.border.BevelBorder.RAISED)));
setBackground(Color.blue);
setForeground(Color.white);
}
}