Java tutorial
import java.awt.GridLayout; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.JButton; import javax.swing.JFrame; public class ActionButtonSample { public static void main(String args[]) { JFrame frame = new JFrame("DefaultButton"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); ActionListener actionListener = new ActionListener() { public void actionPerformed(ActionEvent actionEvent) { String command = actionEvent.getActionCommand(); System.out.println("Selected: " + command); } }; frame.setLayout(new GridLayout(2, 2, 10, 10)); JButton button1 = new JButton("Text Button"); button1.setActionCommand("First"); button1.addActionListener(actionListener); frame.add(button1); frame.setSize(300, 200); frame.setVisible(true); } }