JToggelButton class in java

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 //JToggleButton class
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

class JToggleButton_demo extends JFrame implements ActionListener
{
    Container con;
    JLabel lbl1, lbl2;
    JToggleButton btn1;

    JToggleButton_demo(String title)
    {
        super(title);
        con = new Container();
        con.setLayout(new FlowLayout());


        lbl2 = new JLabel("click Button to ON/OFF" );
        con.add(lbl2);

        lbl1 = new JLabel("   ");
        con.add(lbl1);

        btn1 = new JToggleButton("ON/OFF");
        btn1.addActionListener(this);
        con.add(btn1);

        add(con);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }
    public void actionPerformed(ActionEvent ae)
    {
        if (btn1.isSelected()) {
            btn1.setText("ON");
        }
        else
        {
            btn1.setText("OFF");
        }
        lbl1.setText(btn1.getText());
    }
    public static void main(String[] args) {
            
JToggleButton_demo obj = new JToggleButton_demo("JToggleButton_demo");
            obj.setSize(200, 200);
            obj.setVisible(true);
        }    
}

OUTPUT:

 

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