封装学生信息02

package com.com.FZAL;

public class test01 {
    public static void main(String[] args) {
        Studentf s0 = new Studentf("松松","173","男",23);
        ZY t1 = new ZY("材料","002",24);
        t1.print();
        t1.addStudent(s0);
        t1.print();
    }
}

package com.com.FZAL;

public class ZY {
    private String zname;
    private String zid;
    private int zage;
    private Studentf[] sdf = new Studentf[200];
    private int count = 0;

    public Studentf[] getSdf() {
        return sdf;
    }

    public int getCount() {
        return count;
    }

    public ZY() {
    }

    public ZY(String zname, String zid, int zage) {
        this.zname = zname;
        this.zid = zid;
        this.zage = zage;
    }

    public String getZname() {
        return zname;
    }

    public void setZname(String zname) {
        this.zname = zname;
    }

    public String getZid() {
        return zid;
    }

    public void setZid(String zid) {
        this.zid = zid;
    }

    public int getZage() {
        return zage;
    }

    public void setZage(int zage) {
        this.zage = zage;
    }
    //向专业中添加一个学生的方法：
    public void addStudent(Studentf sm){
        if (sm == null){
            System.out.println("无效哈");
            return;
        }
        sdf[count] = sm;
        count++;
        sm.setZnames(this);
    }
    //输出专业中的所有信息的方法
    public void print(){
        if (count <= 0){
            System.out.println("还没学生");
            return;
        }
        for (int i = 0; i <count ; i++) {
            Studentf sm = sdf[i];//将数组的信息赋值给对象 然后将对象的介绍方法给依次输出出来
            System.out.println(sm.introduce());
        }
    }
    public String introduceZ(){
        String t = "专业信息如下" + "专业名称" + this.getZname()+
                "\n编号" + this.getZid() +
                "\n年限" + this.getZage();
        return  t;
    }
}

package com.com.FZAL;

public class Studentf {
   private String sname;
   private String sid;
   private String sex;
   private int age;
   private ZY znames;

    public ZY getZnames() {
        return znames;
    }

    public void setZnames(ZY znames) {
        this.znames = znames;
    }

    public Studentf() {
    }

    public Studentf(String sname, String sid, String sex, int age) {
        this.sname = sname;
        this.sid = sid;
        this.sex = sex;
        this.age = age;
    }

    public String getSname() {
        return sname;
    }

    public void setSname(String sname) {
        this.sname = sname;
    }

    public String getSid() {
        return sid;
    }

    public void setSid(String sid) {
        this.sid = sid;
    }

    public String getSex() {
        return sex;
    }

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

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        if (age < 0 || age > 100){
            System.out.println("sb");
            return;
        }
        this.age = age;
    }
    //没有设置专业 指针异常解决
    public String introduce(){
        ZY sub = this.znames;
        String s = "学生的信息如下：" + "姓名" + this.getSname() +
                "\n年龄" + this.getAge() +
                "\n学号" + this.getSid() +
                "\n性别" + this.getSex() +
                "\n专业名字1111111111" + (sub==null?"null":sub.getZname()) +
                "\n专业编号" + (sub==null?"null":sub.getZid())  +
                "\n专业年限"
                ;
        return s;
    }
}

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