import javax.swing.*;

public class MySecondGUI extends JFrame{
    
    // Step 1: Declare the componentw
    private JButton tongjin;
    
    public MySecondGUI(){
        // Step 2: Create the component
        tongjin = new JButton("Click me");
        
        // Step 3: Add the component to the container
        getContentPane().add(tongjin);
    }
    
    
    
    public static void main(String args[]){
       MySecondGUI barnet = new MySecondGUI();
       
       barnet.setSize(100,200);
       barnet.setVisible(true);
       
    } //end main
    
}//end class