testgui.java

The code to demonstrate simple GUI in Java

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class TestGUI extends JFrame implements ActionListener{

    private JButton button1 = new JButton ("Button 1");
    private JButton button2 = new JButton ("Button 2");
    private JButton button3 = new JButton ("Clear");
    private JTextField tally  = new JTextField(30);


      public TestGUI() {
      super("A Container With Components");
      Container cp = getContentPane();
      setSize(500,500);
      cp.setLayout(new FlowLayout());

      cp.add (button1);
      cp.add (button2);
      cp.add (button3);
      cp.add(tally);

      button1.addActionListener(this);
      button2.addActionListener(this);
      button3.addActionListener(this);
      setVisible(true);
      setDefaultCloseOperation(EXIT_ON_CLOSE);
   }

     public void actionPerformed( ActionEvent e ){
      if (e.getSource() == button1)
        tally.setText("Button 1 is calling");
      if (e.getSource() == button2)
        tally.setText("Button 2 is calling");
      if (e.getSource() == button3)
        tally.setText("");
   }

   public static void main(String args [] ) {
         new TestGUI();
   }


}