commonaction.java

来自「java Java书籍里面有很多初学java的资料」· Java 代码 · 共 39 行

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

public class commonAction extends JFrame{
  public commonAction() {
    this.setTitle("a common class action outside");
    this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  }
   JButton b01;
  public void MyButtonActionPerform(ActionEvent e){
    b01.setText("you have done");
  }
  public void DrawContent(){
   JPanel panel = new JPanel();
   b01 = new JButton("first button");
   panel.add(b01);
   this.getContentPane().add(panel);
   b01.addActionListener(new ButtonAction(this));
   this.pack();
   this.setVisible(true);
  }
  public static void main(String[] args) {
    commonAction ca = new commonAction();
    ca.DrawContent();
  }
}
//普通类实现
class ButtonAction implements ActionListener{
  commonAction ca;
  public ButtonAction(commonAction c){
  this.ca=c;
  }
  public void actionPerformed(ActionEvent e){
    ca.MyButtonActionPerform(e);
  }
}