import java.applet.Applet;
import java.awt.*;
import java.awt.event.*;

public class sample01 extends Applet implements ActionListener{
    boolean check_sw = false;
    public void init() {
        setBackground(Color.white);
        Button butt = (Button)add(new Button("Push Button"));
        butt.addActionListener(this);
    }

    public void actionPerformed(ActionEvent e) {
        if (check_sw) {
            this.check_sw = false;
        }else {
            this.check_sw = true;
        }
        repaint();
    }

    public void paint(Graphics g) {
        Font font = new Font("MS–¾’©", Font.BOLD ,40);
        g.setFont(font);
        if (check_sw) {
            g.setColor(Color.red);
            g.drawString("ON", 10, 80);
        }else{
            g.setColor(Color.blue);
            g.drawString("OFF",10, 80);
        }
    }
}