Question

我想问一个与动态button actionPerformed相关的问题。我的jFrame内容菜单会引用动态jPanel1 cardLayout和jButton1。动态jPanel1包含saveButton。我将Test ActionListener附加到jButton1。我面临的问题是我已将actionCommand设置为jPanel1.saveButton，如下面的代码所示。当我点击jButton1输出时，我会收到2和3。我还希望点击2nd和3rd jPanel1.SaveButton，但只点击了3rd jPanel1.saveButton。如何点击2nd和3rd jPanel1.SaveButton？

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;

public class Test implements ActionListener {

    public Test() {
    }

    public void actionPerformed(ActionEvent e) {

        for (int i = 0; i<2; i++){
           jPanel1.save.setActionCommand(String.valueOf(i+2));
           String n = jPanel1.save.getActionCommand();
           jPanel1.save.doClick();
           System.out.println("jPanel1: " + n);
        }

           System.out.println("The action have been performed");
    }

    public static void main(String[] agrs) {
           JButton but = new JButton();
           but.addActionListener(new Test());
           but.doClick();
    }  
}

Output:
jPanel1: 2
jPanel1: 3

Answer 1

如果您希望每个ActionListener实例引用不同的JPanel，您可以将对该“JPanel”的引用传递给其构造函数：

JPanel panel1 = new JPanel();   
JButton but = new JButton();
but.addActionListener(new Test(panel1));

并更改构造函数以使用该引用：

JPanel panel; 
public Test(JPanel panel) {
    this.panel = panel;
}

动态jPanel按钮动作命令

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