程式設計工藝大師(Master of Computer Programming)

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
class Test
{

public static void main(String[] args)
{
JFrame jtfMainFrame = new JFrame("Which Button Demo");
JTextField jtfInput = new JTextField(20);

JPanel jpPanel = new JPanel();

JButton jbnButton1= new JButton("1");
JButton jbnButton2= new JButton("2");
JButton jbnButton3= new JButton("3");

jpPanel.add(jbnButton1);
jpPanel.add(jbnButton2);
jpPanel.add(jbnButton3);
jpPanel.add(jtfInput);

jtfMainFrame.setSize(300, 200);
jtfMainFrame.getContentPane().add(jpPanel, BorderLayout.CENTER);
jtfMainFrame.setVisible(true);

jbnButton1.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
System.out.println("Button 1!");
}
});
System.out.println("abc");
}
}