作业1

package com.chen;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

//学员管理系统
public class StudentSys {

    
    public static void main(String[] args) {
        
        Student stus1 = new Student("Jack","李明","男");
        Student stus2 = new Student("SXI","小三","女");
        Student stus3 = new Student("Cols","陈丽","女");
        
         Map <String,Student> stu = new HashMap();
        
         stu.put(stus1.getNickname(),stus1);
         
        stu.put(stus2.getNickname(), stus2);
        
        stu.put(stus3.getNickname(), stus3);
        
        
        System.out.println(stu.containsKey("Jack"));
        
        
        System.out.println(stu.get("Jack"));
        
    }
    
    
}

package com.chen;

//学生类
public class Student {
    
    private String nickname;
    private String name;
    
    private String sex;

    
    public Student() {
        super();
    }


    public Student(String nickname, String name, String sex) {
        super();
        this.nickname = nickname;
        this.name = name;
        this.sex = sex;
    }


    public String getNickname() {
        return nickname;
    }


    public void setNickname(String nickname) {
        this.nickname = nickname;
    }


    public String getName() {
        return name;
    }


    public void setName(String name) {
        this.name = name;
    }


    public String getSex() {
        return sex;
    }


    public void setSex(String sex) {
        this.sex = sex;
    }


    @Override
    public String toString() {
        return  nickname + "对应的学员姓名是:" + name + "; 性别是:" + sex ;
    }
    
    
    
    

}