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 ; } }