collections工具类

package com.com.collections;

import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.List;

public class demo01 {
    //不定参数
    public static void chi(String...args){
        for (String s:args){
            System.out.println(s);
        }
        for (int i = 0; i < args.length ; i++) {
            System.out.println(args[i]);
        }
        System.out.println(args.length);
    }
    public static void main(String[] args) {
        chi("磺胺","木瓜");
        List<Integer> list = new ArrayList<Integer>();
        list.add(123);
        list.add(1234);
        list.add(1235);
        list.add(123655);
        Integer min = Collections.min(list);
        System.out.println(min);
        Integer max = Collections.max(list);
        System.out.println(max);
        //Collections中静态类 直接用//工具类
        //sort是进行排序
        Collections.sort(list);
        System.out.println(list);
        //shuffle是打乱一个列表
        Collections.shuffle(list);
        System.out.println(list);
        Collections.addAll(list,44,5555,13);
        System.out.println(list);

    }
}