import java.awt.*;
import java.awt.event.KeyEvent;
import javax.swing.*;
import sun.awt.SunToolkit;

public class JButtonTest extends JFrame {
    JPanel jPanel = new JPanel();
    private javax.swing.JButton button;
    SunToolkit toolkit = (SunToolkit) Toolkit.getDefaultToolkit();
    public static void main(String[] args) throws Exception {
        final JButtonTest t = new JButtonTest();
        SwingUtilities.invokeAndWait(new Runnable() {
            public void run() {
                t.createAndShowGUI();
            }
        });
        
    }
    private void createAndShowGUI() {
        getContentPane().add(jPanel);
        button = new javax.swing.JButton("TEST BUTTON");
        //button.setContentAreaFilled(true);
        jPanel.setBorder(new javax.swing.border.EtchedBorder());
        button.setContentAreaFilled(false);
        button.setContentAreaFilled(true);
        button.setBackground(Color.blue);
        jPanel.add(button);
        setSize(300,150);
        setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        setVisible(true);
        button.setMnemonic(java.awt.event.KeyEvent.VK_T);
    }   
}