测试Map接口中常用方法

package cn.hq.szxy;

import java.util.HashMap;
import java.util.Map;

/**
 * @author HQ
 * @e-mail [email protected]
 * @date 2018/11/8.
 */
public class TestMap2 {

    public static void main(String[] args) {
        Employee e1 = new Employee(1001, "zhangsan", 2000);
        Employee e2 = new Employee(1002, "lisi", 10000);
        Employee e3 = new Employee(1003, "wangwu", 31000);
        Map<Integer, Employee> map = new HashMap<>();

        map.put(1001,e1);
        map.put(1002,e2);
        map.put(1003,e3);

        Employee employee=map.get(1001);
        System.out.println(employee.getEname());

        System.out.println(employee);
    }
}

class Employee {

    private int id;
    private String ename;
    private double salary;

    public Employee() {
    }

    public Employee(int id, String ename, double salary) {
        this.ename = ename;
        this.id = id;
        this.salary = salary;
    }

    public String getEname() {
        return ename;
    }

    public void setEname(String ename) {
        this.ename = ename;
    }

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public double getSalary() {
        return salary;
    }

    public void setSalary(double salary) {
        this.salary = salary;
    }

    @Override
    public String toString() {
        return "id:"+id+"\n"+"name:"+ename+"\n"+"salary:"+salary;
    }
}

运行结果