gistfile1.txt

import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;

/**
 * Created by KanzakiMirai on 10/26/16.
 */
public class Test {
    public static void main(String[] args) {
        Demo tmp = new Demo();
        tmp.main();
    }
}

class Demo {
    ArrayList<Hero> arrayList = new ArrayList<>();

    void main() {
        this.arrayList.add(new Hero("Reaper", 250));
        this.arrayList.add(new Hero("Mei", 250));
        this.arrayList.add(new Hero("Mercy", 200));
        this.arrayList.add(new Hero("D.VA", 600));
        this.arrayList.add(new Hero("Roadhog", 600));

        System.out.println("arrayList = " + arrayList);

        Comparator<Hero> comparator = (o1, o2) -> o2.health - o1.health;

        Collections.sort(this.arrayList, comparator);

        System.out.println("this.arrayList = " + this.arrayList);
    }
}

class Hero {
    public String name;
    public Integer health;

    Hero(String name, Integer health) {
        this.name = name;
        this.health = health;
    }

    @Override
    public String toString() {
        return String.format("name: %s, health: %d", this.name, this.health);
    }
}