package com.company;

import java.util.*;

/**

 * Created by wangbin10 on 2017/1/5.

 */

public class Collection {

    public static void main(String[] args){

//Set

        Set<Integer> s1 = new HashSet<Integer>();

        for(int i=0;i<10;i++){

            s1.add(i);

        }

        s1.remove(5);

        System.out.println(s1);

        System.out.println(s1.size());

        System.out.println(s1.isEmpty());

//ArrayList

        List<String> s2=new ArrayList<String>();

        s2.add("one");

        s2.add("two");

        s2.add("three");

        s2.add("four");

        s2.remove(0);

        System.out.println(s2.size());

        System.out.println(s2.get(2));

        System.out.println(s2.contains("two"));

        System.out.println(s2.equals(s2));

        Iterator it=s2.iterator();

        while(it.hasNext()){

            System.out.println(it.next());

        }

//HashMap

        Map<String,Integer> s3=new HashMap<String, Integer>();

        s3.put("zhao",1);

        s3.put("qian",2);

        s3.put("sun",3);

        s3.put("li",4);

        System.out.println(s3.get("sun"));

        System.out.println(s3.keySet());

        System.out.println(s3.values());

        System.out.println(s3.containsKey("wang"));

        System.out.println(s3.containsValue(5));

        System.out.println(s3.remove("qian"));

    }

}