java给按钮添加事件的问题

事件写在一个类中，可以实现。单击这三个按钮，文本框显示对于按钮的文本。
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
class ButtonListener extends JFrame implements ActionListener{
JButton ok, cancel,exit;
JTextField t=new JTextField(8);
public ButtonListener(String title){
super(title);
this.setLayout(new FlowLayout());
ok = new JButton("确定");
cancel = new JButton("返回");
exit = new JButton("退出");
ok.addActionListener(this);
cancel.addActionListener(this);
exit.addActionListener(this);
getContentPane().add(ok);
getContentPane().add(cancel);
getContentPane().add(exit);
getContentPane().add(t);
}

public void actionPerformed(ActionEvent e){
if(e.getSource()==ok)
t.setText("确定");
if(e.getSource()==cancel)
t.setText("返回");
if(e.getSource()==exit)
t.setText("退出");
}
public static void main(String args[]) {
ButtonListener pd=new ButtonListener("ActionEvent Demo");
pd.setSize(250,100);
pd.setVisible(true);
}
}

我想把它写成两个类，两个源文件，还实现上面的结果应该怎么写呢？
一个ButtonListener1类，一个 MyListener类
注意：ButtonListener1类和， MyListener类是各写在一个单独的源文件中的。
//ButtonListener1类源文件
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
class ButtonListener1 extends JFrame {
JButton ok, cancel,exit;
JTextField t=new JTextField(8);
public ButtonListener1(){
//super(title);
this.setLayout(new FlowLayout());
ok = new JButton("确定");
cancel = new JButton("返回");
exit = new JButton("退出");
ok.addActionListener(new MyListener());
cancel.addActionListener(new MyListener());;
exit.addActionListener(new MyListener());;
getContentPane().add(ok);
getContentPane().add(cancel);
getContentPane().add(exit);
getContentPane().add(t);
}

public static void main(String args[]) {
ButtonListener1 pd=new ButtonListener1();
pd.setSize(250,100);
pd.setVisible(true);
}
}

// MyListener类源文件
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
class MyListener implements ActionListener{
public void actionPerformed(ActionEvent e){
if(e.getActionCommand()=="确定"){

}

if(e.getActionCommand()=="返回"){

}

if(e.getActionCommand()=="退出"){

}
}

import java.awt.FlowLayout;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JTextField;
class ButtonListener1 extends JFrame
{
JButton ok, cancel, exit;
JTextField t = new JTextField(8);
public ButtonListener1()
{
// super(title);
this.setLayout(new FlowLayout());
ok = new JButton("确定");
cancel = new JButton("返回");
exit = new JButton("退出");
ok.addActionListener(new MyListener(this));
cancel.addActionListener(new MyListener(this));
exit.addActionListener(new MyListener(this));
getContentPane().add(ok);
getContentPane().add(cancel);
getContentPane().add(exit);
getContentPane().add(t);
}
public static void main(String args[])
{
ButtonListener1 pd = new ButtonListener1();
pd.setSize(250, 100);
pd.setVisible(true);
}
}

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
class MyListener implements ActionListener
{
private ButtonListener1 frame;
public MyListener()
{
}
public MyListener(ButtonListener1 frame)
{
this.frame = frame;
}
public void actionPerformed(ActionEvent e)
{
if (e.getActionCommand() == "确定")
{
frame.t.setText("确定");
}
if (e.getActionCommand() == "返回")
{
frame.t.setText("返回");
}
if (e.getActionCommand() == "退出")
{
frame.t.setText("退出");
}
}
}

温馨提示：内容为网友见解，仅供参考

当前网址：https://11.t2y.org/zz/28vpp82mm.html