restlist.java

来自「源码为科学出版社出版的英文<java设计模式>(影印版)所用的所有例」· Java 代码 · 共 28 行

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.text.*;
import javax.swing.border.*;

public class RestList extends JawtList
implements Chain {
    private Chain nextChain = null;
    public RestList() {
        super(10);     //arg to JawtList
        setBorder(new LineBorder(Color.black));
    }
    public void addChain(Chain c) {
        nextChain = c;
    }
    public void sendToChain(String mesg) {
        add(mesg);        //this is the end of the chain
        repaint();
        if (nextChain != null)
            nextChain.sendToChain(mesg);
    }
    public Chain getChain() {
        return nextChain;
    }
}