package org.mytest;

import java.util.ArrayList;

/**对ArrayList.remove或者contains的笔记

 * contains,remove时会执行equals()

 * 例子1，删除为false

 * 例子2，删除为true

 * @author ywf

 *

 */

public class test {

public static void main(String[] args) {

    System.out.println("例子1：ArrayList删除Node对象:");

    ArrayList<Node> list = new ArrayList<Node>();

    Node node1 = new Node(1);

    Node node2 = new Node(2);

    list.add(node1);

    list.add(node2);

    System.out.println(list.remove(new Node(1)));

    System.out.println("例子2：ArrayList删除Integer对象:");

    ArrayList<Integer> list1 = new ArrayList<Integer>();

    Integer node11 = new Integer(1);

    Integer node21 = new Integer(2);

    list1.add(node11);

    list1.add(node21);

    System.out.println(list1.remove(new Integer(1)));

}

}

class Node{

    int id;

    public Node(int id){

        this.id = id;

    }

    public boolean equals(Node node){

        return this.id==node.id;

    }

}