Java tutorial
import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.JButton; import javax.swing.JDialog; import javax.swing.JFrame; import javax.swing.JOptionPane; class MyActionListener implements ActionListener { public void actionPerformed(ActionEvent e) { JButton source = (JButton) e.getSource(); String buttonText = source.getText(); JOptionPane.showMessageDialog(null, "You clicked" + buttonText); } } public class ActionListenerTest1 { public static void main(String[] args) { JFrame.setDefaultLookAndFeelDecorated(true); JDialog.setDefaultLookAndFeelDecorated(true); JFrame frame = new JFrame("ActionListener Test 1"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); JButton button = new JButton("Register"); button.addActionListener(new MyActionListener()); frame.getContentPane().add(button); frame.pack(); frame.setVisible(true); } }