package ThreadTest;

import java.util.ArrayList;

import java.util.Collection;

import java.util.HashSet;

public class Aggregate {

public void test(){

Collection collection = new ArrayList();

collection.add("孙悟空");

collection.add(6);

System.out.println("collection元素的集合个数为"+collection.size());

collection.remove(6);

System.out.println("collection元素的集合个数为"+collection.size());

System.out.println("collection的集合里面是否包含孙悟空的元素"+collection.contains("孙悟空"));

collection.add("hanshizhe");

collection.add(990);

collection.add("疯狂JAVA讲义");

// collection.add("疯狂ANDROID讲义");

System.out.println("collection所有集合数为"+collection);

Collection books = new HashSet();

books.add("疯狂JAVA讲义");

books.add("疯狂ANDROID讲义");

System.out.println("books所有集合数为"+books);

System.out.println("collection集合是否包含所有books集合"+collection.containsAll(books));

System.out.println("collection所有集合数为"+collection);

// collection.removeAll(books);

System.out.println("collection 去掉BOOKS的集合为"+collection);

// collection.clear();

System.out.println("删除collection所有集合数为"+collection);

// books.retainAll(collection);

System.out.println("books所有集合数为"+books);

}

}