package com.imooc.model;
public class Subject {
private String subjectName;
private String subjectNo;
private int subjectLife;
private Student[] myStudents;
private int studentNum;
// 无参构造方法
public Subject() {
}
// 带参构造，带参构造，实现对全部属性的赋值
public Subject(String subjectName,String subjectNo,int subjectLife) {
// this.subjectName = subjectName;
// this.subjectNo = subjectNo;
// this.subjectLife = subjectLife;
this.setSubjectName(subjectName);
this.setSubjectNo(subjectNo);
this.setSubjectLife(subjectLife);
}
public Subject(String subjectName,String subjectNo,int subjectLife,Student[] myStudents) {
this.setSubjectName(subjectName);
this.setSubjectNo(subjectNo);
this.setSubjectLife(subjectLife);
this.setMyStudents(myStudents);
}
public int getStudentNum() {
return studentNum;
}
public void setStudentNum(int studentNum) {
this.studentNum = studentNum;
}
/**
* 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 String getSubjectName() {
return subjectName;
}
public void setSubjectName(String subjectName) {
this.subjectName = subjectName;
}
public String getSubjectNo() {
return subjectNo;
}
public void setSubjectNo(String subjectNo) {
this.subjectNo = subjectNo;
}
public int getSubjectLife() {
return subjectLife;
}
// 设置学制年限，限制必须>0
public void setSubjectLife(int subjectLife) {
if(subjectLife<=0)
return;
this.subjectLife = subjectLife;
}
/**
* 专业介绍的方法
* @return 专业介绍的相关信息，包括名称、编号、年限
*/
public String info() {
String str = "专业信息如下：\n专业名称：" + this.getSubjectName() + "\n专业编号：" + this.getSubjectNo() + "\n学制年限："
+ this.getSubjectLife() + "年";
return str;
}
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
for(int i=0;i<this.getMyStudents().length;i++) {
if(this.getMyStudents()[i]==null) {
this.getMyStudents()[i] = stu;
// 2、将学生个数保存到studentNum
this.studentNum=i+1;
return;
}
}
}
}
package com.imooc.model;
public class Student {
// 成员属性：学号、姓名、性别、年龄、专业
private String studentNo;
private String studentName;
private String studentSex;
private int studentAge;
private Subject studentSubject;
public Student() {
super();
}
//多参构造方法，实现对学号、姓名、性别、年龄的赋值
public Student(String studentNo, String studentName, String studentSex, int studentAge) {
this.setStudentNo(studentNo);
this.setStudentName(studentName);
this.setStudentSex(studentSex);
this.setStudentAge(studentAge);
}
// 多参构造方法，实现对全部属性的赋值
public Student(String studentNo, String studentName, String studentSex, int studentAge,Subject studentSubject) {
this.setStudentNo(studentNo);
this.setStudentName(studentName);
this.setStudentSex(studentSex);
this.setStudentAge(studentAge);
this.setStudentSubject(studentSubject);
}
public String getStudentNo() {
return studentNo;
}
public void setStudentNo(String studentNo) {
this.studentNo = studentNo;
}
public String getStudentName() {
return studentName;
}
public void setStudentName(String studentName) {
this.studentName = studentName;
}
public String getStudentSex() {
return studentSex;
}
public void setStudentSex(String studentSex) {
//if(studentSex.equals("男"))
if(studentSex=="男" || studentSex=="女")
this.studentSex = studentSex;
else
this.studentSex = "男";
}
public int getStudentAge() {
return studentAge;
}
public void setStudentAge(int studentAge) {
if(studentAge<10 || studentAge>=100)
this.studentAge = 18;
else
this.studentAge = studentAge;
}
/**
* 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 getStudentSubject() {
if(this.studentSubject ==null)
this.studentSubject = new Subject();
return studentSubject;
}
public void setStudentSubject(Subject studentSubject) {
this.studentSubject = studentSubject;
}
/**
* 学生自我介绍的方法
*
* @return 自我介绍的信息，包括姓名、学号、性别、年龄
*/
public String introduction() {
String str = "学生信息如下：\n姓名：" + this.getStudentName() + "\n学号：" + this.getStudentNo() + "\n性别："
+ this.getStudentSex() + "\n年龄：" + this.getStudentAge()+ "\n所报专业名称：" + this.getStudentSubject().getSubjectName() + "\n学制年限："
+ this.getStudentSubject().getSubjectLife();
return str;
}
/**
* 学生自我介绍的方法
* @param subjectName 所学专业名称
* @param subjectLife 学制年限
* @return 自我介绍的信息，包括姓名、学号、性别、年龄、所学专业名称、学制年限
*/
public String introduction(String subjectName, int subjectLife) {
String str = "学生信息如下：\n姓名：" + this.getStudentName() + "\n学号：" + this.getStudentNo() + "\n性别："
+ this.getStudentSex() + "\n年龄：" + this.getStudentAge() + "\n所报专业名称：" + subjectName + "\n学制年限："
+ subjectLife;
return str;
}
/**
* 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、所学专业名称、学制年限
*/
public String introduction(Subject mySubject){
String str = "学生信息如下：\n姓名：" + this.getStudentName() + "\n学号：" + this.getStudentNo() + "\n性别："
+ this.getStudentSex() + "\n年龄：" + this.getStudentAge() + "\n所报专业名称：" + mySubject.getSubjectName() + "\n学制年限："
+ mySubject.getSubjectLife()+"\n专业编号："+mySubject.getSubjectNo();
return str;
}
}
package com.imooc.test;
import com.imooc.model.Student;
import com.imooc.model.Subject;
public class Test {
public static void main(String[] args) {
// TODO Auto-generated method stub
Subject sub1 = new Subject("计算机科学与应用","J0001",4);
System.out.println(sub1.info());
System.out.println("================================");
//测试Student
Student stu1=new Student("S01","张三","女",200,sub1);
System.out.println(stu1.introduction());
System.out.println("================================");
Student stu2=new Student("S02","李四","女",17);
System.out.println(stu2.introduction("计算机科学与应用", 4));
System.out.println("================================");
Student stu3=new Student("S03","王五","男",18);
System.out.println(stu3.introduction(sub1));
System.out.println("================================");
//测试指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.getSubjectName()+"的专业中已有"+sub1.getStudentNum()+"学生进行了报名");
}
}
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