updateframe.java

java观察者模式的具体代码

package java_observer;

import javax.swing.*;
import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Vector;

public class UpdateFrame extends JFrame {
    /**
	 * 
	 */
	private static final long serialVersionUID = 1L;
	BorderLayout borderLayout1 = new BorderLayout();
    JButton jButton1 = new JButton();
    updateInterface uf[] = new updateInterface[5];//定义接口数组。
    Vector impFrame = new Vector();
    private int index;//数组。

    public UpdateFrame() {
        try {
            jbInit();
        } catch (Exception exception) {
            exception.printStackTrace();
        }
    }

    private void jbInit() throws Exception {
        getContentPane().setLayout(borderLayout1);
        jButton1.setText("jButton1");
        jButton1.addActionListener(new UpdateFrame_jButton1_actionAdapter(this));
        this.getContentPane().add(jButton1, java.awt.BorderLayout.CENTER);
    }


    //添加观察者
    public void addObserver(Object p){
        this.uf[index]= (updateInterface) p;//
        this.index++;
    }

    //更改数据
    public void notiFyUpdate(){
        for(int i=0;i<this.index;i++){
            this.uf[i].updateJLable("数据已经更改！");
        }
    }


    public void jButton1_actionPerformed(ActionEvent e) {
        this.notiFyUpdate();
    }
}


class UpdateFrame_jButton1_actionAdapter implements ActionListener {
    private UpdateFrame adaptee;
    UpdateFrame_jButton1_actionAdapter(UpdateFrame adaptee) {
        this.adaptee = adaptee;
    }

    public void actionPerformed(ActionEvent e) {
        adaptee.jButton1_actionPerformed(e);
    }
}