一个动作侦听器，两个JButton

Question

我有两个分别JButtons称为“左”和“右”。“左”按钮将矩形对象向左移动，“右”按钮将其向右移动。我ActionListener在班上有一个充当单击任一按钮时的侦听器。但是，我希望单击每个动作时都会发生不同的动作。如何区分ActionListener点击的？

Answer 1

将actionCommand设置到每个按钮。

//将动作命令设置到两个按钮上。

 btnOne.setActionCommand("1");
 btnTwo.setActionCommand("2");

public void actionPerformed(ActionEvent e) {
 int action = Integer.parseInt(e.getActionCommand());

 switch(action) {
 case 1:
         //doSomething
         break;
 case 2: 
         // doSomething;
         break;
 }
}

更新：

public class JBtnExample {
    public static void main(String[] args) {
        JButton btnOne = new JButton();
        JButton btnTwo = new JButton();

        ActionClass actionEvent = new ActionClass();

        btnOne.addActionListener(actionEvent);
                btnTwo.addActionListener(actionEvent);

        btnOne.setActionCommand("1");
        btnTwo.setActionCommand("2");
    }
}

class ActionClass implements ActionListener {

    @Override
    public void actionPerformed(ActionEvent e) {
        int action = Integer.parseInt(e.getActionCommand());
        switch (action) {
        case 1:
            // DOSomething
            break;
        case 2:
            // DOSomething
            break;                          
        default:
            break;
        }
    }
}