简单的Java标签事件驱动编程

Question

为此，我有所有的代码，除了最后一部分(它可能有点杂乱无章，但它可以工作)，代码只需要我打印标签的按钮已被点击。(根据我的教授的说法，最后一部分是唯一需要编辑的部分)

代码如下：

import javax.swing.*;
import java.awt.*;
import java.awt.event.*; // added this import

public class lab6 extends JFrame{


    public lab6() {
        setLayout(new FlowLayout());


        JButton b1 = new JButton ("Button 1");
        JButton b2 = new JButton ("Button 2");
        JButton b3 = new JButton ("Button 3");
        JButton b4 = new JButton ("Button 4");
        JButton b5 = new JButton ("Button 5");
        JButton b6 = new JButton ("Button 6");

        // Create two panels
        JPanel panel1 = new JPanel();
        JPanel panel2 = new JPanel();


        Buttonz bh = new Buttonz();


        // add buttons to panels
        panel1.add(b1);
        panel1.add(b2);
        panel1.add(b3);
        panel2.add(b4);
        panel2.add(b5);
        panel2.add(b6);


        // Add panels to frame
        add(panel1);
        add(panel2);

// registering button 1
        b1.addActionListener(bh);
        b2.addActionListener(bh);
        b3.addActionListener(bh);
        b4.addActionListener(bh);
        b5.addActionListener(bh);
        b6.addActionListener(bh);

    }

    public static void main(String[] args) {
        lab6 frame = new lab6();
        frame.setTitle(" Exercise 12_1 ");
        frame.setSize(700,75);
        frame.setLocationRelativeTo(null); // center frame
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setVisible(true);
    }


  class Buttonz implements ActionListener
  {
      @Override
      public void actionPerformed(ActionEvent e)
      {

        System.out.println(bh);
          // Use e.getActionCommand() to obtain the label of the button
          // Use System.out.println to display the label of the button

      }
  }
}

我将感谢任何人的帮助和帮助。谢谢！(：

Answer 1

只需更改：

System.out.println(bh);

至

System.out.println(e.getActionCommand());