info

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");
}

}