package ericzz.java8.map;

import ericzz.java8.base.pojo.Apple;

import com.google.common.base.Objects;

import lombok.Data;

import java.util.HashMap;

import java.util.Map;

/**

*  

* 
* @author zz_huns
 

*  @version Id: MapDemo.java, v 0.1 2019/12/8 12:29 AM zz_huns Exp $$

*/

public class MapDemo {

public static void main1(String[] args) {

Map map = new HashMap<>();

// map.put("k1","v1");

// map.put("k1","vv1");

// System.out.println("==="+map.toString());

MyMap m1 = new MyMap();

m1.setAge(1);

m1.setName("k");

MyMap m2 = new MyMap();

m2.setAge(1);

m2.setName("k");

map.put(m1, 1);

map.put(m2, 2);

System.out.println("===" + map.toString());

}

/**

* java 8 map 新特性

* Key 实现 Comparable 接口 提升性能验证

*

* @param args

*/

public static void main(String[] args) {

Long start = System.currentTimeMillis();

Map<Apple, String> map = new HashMap();

for (int i = 0; i < 500000; i++) {

Apple apple = new Apple();

apple.setColor(i);

map.put(apple, apple.getColor().toString());

}

System.out.println(System.currentTimeMillis() - start);

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

}

@Data

static class MyMap {

private String name;

private Integer age;

@Override

public boolean equals(Object o) {

if (this == o) return true;

if (!(o instanceof MyMap)) return false;

if (!super.equals(o)) return false;

MyMap myMap = (MyMap) o;

return Objects.equal(name, myMap.name) && Objects.equal(age, myMap.age);

}

@Override

public int hashCode() {

return Objects.hashCode(super.hashCode(), name, age);

}

}

}