package lambda;
 
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
import java.util.Random;

import charactor.Hero;
 
public class TestAggregate {
 
    public static void main(String[] args) {
        Random r = new Random();
        List<Hero> heros = new ArrayList<Hero>();
        for (int i = 0; i < 10; i++) {
            heros.add(new Hero("hero " + i, r.nextInt(1000), r.nextInt(100)));
        }

        System.out.println("初始化集合后的数据 (最后一个数据重复)：");
        System.out.println(heros);
        
        //传统方式
        Collections.sort(heros,new Comparator<Hero>() {
			@Override
			public int compare(Hero o1, Hero o2) {
				return (int) (o2.hp-o1.hp);
			}
		});
        
        Hero hero = heros.get(2);
        System.out.println("通过传统方式找出来的hp第三高的英雄名称是:" + hero.name);
        
        //聚合方式
        String name =heros
        	.stream()
        	.sorted((h1,h2)->h1.hp>h2.hp?-1:1)
        	.skip(2)
        	.map(h->h.getName())
        	.findFirst()
        	.get();

        System.out.println("通过聚合操作找出来的hp第三高的英雄名称是:" + name);
        
    }
}