package com.imooc.info;public class Student { // 学生姓名如下： // 姓名 // 学号 // 性别 // 年龄 // 新增专业属性 private String StuName; private String StuNo; private String StuSex; private int StuAge; private Subject StuSubject; // 无参构造方法 public Student() { } // 多参构造方法，实现对全部属性的赋值 public Student(String stuName, String stuNo, String stuSex, int stuAge, Subject stuSubject) { this.setStuName(stuName); this.setStuNo(stuNo); this.setStuSex(stuSex); this.setStuAge(stuAge); this.setStuSubject(stuSubject); } // 多参构造方法，实现对姓名、学号、性别、年龄----四参 public Student(String stuName, String stuNo, String stuSex, int stuAge) { this.setStuName(stuName); this.setStuNo(stuNo); this.setStuSex(stuSex); this.setStuAge(stuAge); } public String getStuName() { return StuName; } public void setStuName(String stuName) { StuName = stuName; } public String getStuNo() { return StuNo; } public void setStuNo(String stuNo) { StuNo = stuNo; } public String getStuSex() { return StuSex; } // 限制性别只能为"男"或者"女"，否则为"未知" public void setStuSex(String stuSex) { if (stuSex == "男" || stuSex == "女") { StuSex = stuSex; } else StuSex = "未知"; } public int getStuAge() { return StuAge; } /** * 给年龄赋值，限定必须在10-100之间，反之赋值为18 * * @param stuAge */ public void setStuAge(int stuAge) { if (stuAge < 10 || stuAge > 100) { this.StuAge = 18; } else StuAge = stuAge; } /** * 获取专业对象，如果没有实例化，先实例化后再返回 * * @return 专业对象信息 */ public Subject getStuSubject() { if (this.StuSubject == null) { this.StuSubject = new Subject(); } return StuSubject; } public void setStuSubject(Subject stuSubject) { StuSubject = stuSubject; } /** * 学生自我介绍的方法 * * @param SubName * 所报专业名称 * @param SubYear * 学制年限 * @return自我介绍的信息，包括姓名、学号、性别、年龄 */ public String Stu() { String messageStudent = "==========================\n学生信息如下：\n姓名：" + this.getStuName() + "\n学号：" + this.getStuNo() + "\n性别：" + this.getStuSex() + "\n年龄：" + this.getStuAge(); return messageStudent; }//方法一 public String Stu(String SubName, int SubYear) { String messageStudent = "==========================\n学生信息如下：\n姓名：" + this.getStuName() + "\n学号：" + this.getStuNo() + "\n性别：" + this.getStuSex() + "\n年龄：" + this.getStuAge() + "\n所报专业名称：" + SubName + "\n学制年限：" + SubYear; return messageStudent; }//方法二 /** * 学生自我介绍的方法 * * @param mySubject * 所选专业的对象 * @return自我介绍的信息，包括姓名、学号、性别、年龄，以及通过对象传入的所报专业名称、学制年限 */ public String Stu(Subject mySubject) { String messageStudent = "==========================\n学生信息如下：\n姓名：" + this.getStuName() + "\n学号：" + this.getStuNo() + "\n性别：" + this.getStuSex() + "\n年龄：" + this.getStuAge() + "\n所报专业名称：" + mySubject.getSubName() + "\n学制年限：" + mySubject.getSubYear(); return messageStudent; }//方法三 public String Stu2() { String messageStudent = "==========================\n学生信息如下：\n姓名：" + this.getStuName() + "\n学号：" + this.getStuNo() + "\n性别：" + this.getStuSex() + "\n年龄：" + this.getStuAge() + "\n所报专业名称：" + this.getStuSubject().getSubName() + "\n专业年限：" + this.getStuSubject().getSubYear(); return messageStudent; }} package com.imooc.info;
public class Subject {
// 成员属性：学科名称、学科编号、学制年限、报名选修的学生信息、报名选修的学生个数 private String SubName; private String SubNo; private int SubYear; private Student[] myStudents; private int studentNum;// 无参构造方法
public Subject() {}
// 多参构造方法，实现对学科名称、编号、学制年限的赋值
public Subject(String subName, String subNo, int subYear) { this.setSubName(subName); this.setSubNo(subNo); this.setSubYear(subYear); }// 多参构造方法，实现对全部属性的赋值
public Subject(String subName, String subNo, int subYear, Student[] myStudents) { this.setSubName(subName); this.setSubNo(subNo); this.setSubYear(subYear); this.setMyStudents(myStudents);}
public String getSubName() {
return SubName; }public void setSubName(String subName) {
SubName = subName; }public String getSubNo() {
return SubNo; }public void setSubNo(String subNo) {
SubNo = subNo; }public int getSubYear() {
return SubYear; }/**
* 获取选修专业的学生信息，如果保存学生信息的数组未被初始化，则，先初始化长度200 * * @return 保存学生信息的数组 */ public Student[] getMyStudents() { if (this.myStudents==null) { this.myStudents=new Student[200]; } return myStudents; }public void setMyStudents(Student[] myStudents) {
this.myStudents = myStudents; }public void setSubYear(int subYear) {
SubYear = subYear; }public int getStudentNum() {
return studentNum; }public void setStudentNum(int studentNum) {
this.studentNum = studentNum; }public String Sub() {
String messageSubject = "专业信息如下：\n专业名称：" + this.getSubName() + "\n专业编号：" + this.getSubNo() + "\n学制年限：" + this.getSubYear() + "年"; return messageSubject; }public void addStudent(Student stu) {
/* * 1、将学生保存到数组中 2、将学生个数保存到studentNum */ // 1、将学生保存到数组中 int i; for (i = 0; i < this.getMyStudents().length; i++) { if (this.getMyStudents()[i] == null) { this.getMyStudents()[i] = stu; break; } } // 2、将学生个数保存到studentNum this.studentNum = i + 1; }}package com.imooc.info;
import com.imooc.info.Student;
import com.imooc.info.Subject;public class Test {
public static void main(String[] args) {
Subject sub1=new Subject("计算机科学与应用","J0001",4); System.out.println(sub1.Sub()); Student stu1=new Student("张三","S01","男",18,sub1); System.out.println(stu1.Stu2()); Student stu2=new Student("李四","S02","男",17); System.out.println(stu2.Stu("计算机科学与应用", 4)); Student stu3=new Student("王五","S03","男",18); System.out.println(stu3.Stu(sub1)); //测试制定专业中到底有多少学生报名 //sub1.addStudent(stu1); //sub1.addStudent(stu2); //sub1.addStudent(stu3); System.out.println(sub1.getSubName()+"的专业共招生"+sub1.getStudentNum()+"人"); }}
