2020-03-12

庚子鼠年 己卯月 甲寅日

描述

今天录制了关下于java代码分析的视频，学习组合模式，装饰者模式

优秀博客推荐：https://blog.csdn.net/ThinkWon/article/details/102980571

随笔

组合模式

参考博客：https://baijiahao.baidu.com/s?id=1639579541093787227&wfr=spider&for=pc

https://www.cnblogs.com/WindSun/p/10263376.html

Component: 抽象构件

public abstract class Component {

    public abstract void add(Component c);
    public abstract void remove(Component c);
    public abstract Component getChild(int i);
    public abstract void operation();

}

Leaf: 叶子构件

public class Leaf extends Component {
    @Override
    public void add(Component c) {
        //异常处理或错误提示
    }

    @Override
    public void remove(Component c) {
        //异常处理或错误提示
    }

    @Override
    public Component getChild(int i) {
        //异常处理或错误提示
        return null;
    }

    @Override
    public void operation() {
        //实现代码
    }
}

Composite: 容器构件

import java.util.ArrayList;

public class Composite extends Component {

    private ArrayList list = new ArrayList();

    @Override
    public void add(Component c) {
        list.add(c);
    }

    @Override
    public void remove(Component c) {
        list.remove(c);
    }

    @Override
    public Component getChild(int i) {
        return  (Component)list.get(i);
    }

    @Override
    public void operation() {
        for(Object obj:list) {
            ((Component)obj).operation();
        }
    }
}

外观者模式