package com.test.collection;

import java.util.HashMap;

import java.util.Map;

/**

 * 重写equals & hashcode

 *

 * 1.如果两个对象的equals为true ,则hashCode也为true

 * 2.重写equals时，必须重写hashCode（保证equals为true ,hashCode也为true）

 * @author chenx

 *

 */

public class Student {

    public Student(int id, String name) {

        super();

        this.id = id;

        this.name = name;

    }

    private int id;

    private String name;

    @Override

    public int hashCode() {

        final int prime = 31;

        int result = 1;

        result = prime * result + id;

        return result;

    }

    @Override

    public boolean equals(Object obj) {

        if (this == obj)

            return true;

        if (obj == null)

            return false;

        if (getClass() != obj.getClass())

            return false;

        Student other = (Student) obj;

        if (id != other.id)

            return false;

        return true;

    }

}