程序没问题，可我想问的是为什么不能执行

Question

public class SchoolTest {
public static void mian (String[]args){
Student st1=new Student ();
Student st2=new Student ();
Teacher te1=new Teacher ();
Teacher te2=new Teacher ();
st1.setschoolname ("重庆大学");
st1.setclassname ("计算机二班");
st1.setname ("王刚");
st1.setcode ("951034");
st1.setsex ("男");
st1.setbirthday ("1975-07-21");
st1.setfamilyaddress ("上海浦东新区");
//我是分隔符╮(╯▽╰)╭
st2.setschoolname ("重庆大学");
st1.setclassname ("计算机三班");
st1.setname ("谢娜");
st1.setcode ("951068");
st1.setsex ("女");
st1.setbirthday ("1975-10-09");
st1.setfamilyaddress ("北京海淀区");
//我是分隔符╮(╯▽╰)╭
te1.setschoolname ("四川大学");
te1.setclassname ("计算机二班");
te1.setname ("赵敏");
te1.setcode ("001234");
te1.setsex ("女");
te1.setbirthday ("1968-04-20");
te1.setfamilyaddress ("重庆市沙坪坝区");
//我是分隔符╮(╯▽╰)╭
te2.setschoolname ("四川大学");
te2.setclassname ("机械系三班");
te2.setname ("赵日天");
te2.setcode ("000001");
te2.setsex ("男");
te2.setbirthday ("1961-02-13");
te2.setfamilyaddress ("成都市区");
//我是分隔符╮(╯▽╰)╭
System.out.println (st1.toString ());
System.out.println (st2.toString ());
System.out.println (te1.toString ());
System.out.println (te2.toString ());
}
}

Answer 1

public class School {
private String schoolName;
private String className;
private String name;
private String code;
private String sex;
private String birthday;
private String address;
public School() {
super();
}
public School(String schoolName, String className, String name, String code, String sex, String birthday,
String address) {
super();
this.schoolName = schoolName;
this.className = className;
this.name = name;
this.code = code;
this.sex = sex;
this.birthday = birthday;
this.address = address;
}

public String getSchoolName() {
    return schoolName;
}
public void setSchoolName(String schoolName) {
    this.schoolName = schoolName;
}
public String getClassName() {
    return className;
}
public void setClassName(String className) {
    this.className = className;
}
public String getName() {
    return name;
}
public void setName(String name) {
    this.name = name;
}
public String getCode() {
    return code;
}
public void setCode(String code) {
    this.code = code;
}
public String getSex() {
    return sex;
}
public void setSex(String sex) {
    this.sex = sex;
}
public String getBirthday() {
    return birthday;
}
public void setBirthday(String birthday) {
    this.birthday = birthday;
}
public String getAddress() {
    return address;
}
public void setAddress(String address) {
    this.address = address;
}

}

---

public class Student extends School{
public Student(){
super();
}
public Student(String schoolName, String className, String name, String code, String sex, String birthday,
String address){
super(schoolName,className, name, code, sex, birthday,
address);
}
@Override
public String toString() {
return "学校名称:"+this.getSchoolName()+"，"+"班级名称"+this.getClassName()+"，"
+"学生姓名"+this.getName()+"，"+"学号："+this.getCode()+"，"
+"性别："+this.getSex()+"，"+"出生年月："+this.getBirthday()+","
+"家庭住址："+this.getAddress();
}

}

public class Teacher extends School{
public Teacher(){
super();
}
public Teacher(String schoolName, String className, String name, String code, String sex, String birthday,
String address){
super(schoolName,className, name, code, sex, birthday,
address);
}
@Override
public String toString() {
return "学校名称:"+this.getSchoolName()+"，"+"班级名称"+this.getClassName()+"，"
+"教师姓名"+this.getName()+"，"+"教师工号："+this.getCode()+"，"
+"性别："+this.getSex()+"，"+"出生年月："+this.getBirthday()+","
+"家庭住址："+this.getAddress();
}

}

public class Test {
public static void main(String[] args) {
School[] s = new School[4];
s[0]= new Student("重庆大学","计算机二班","王刚","951034","男","1975-07-21","上海浦东新区");
s[1]= new Student("重庆大学","计算机二班","谢娜","951034","女","1976-07-21","北京海淀区");
s[2]= new Teacher("四川大学","计算机二班","赵敏","951034","女","1975-07-21","上海浦东新区");
s[3]= new Teacher("四川大学","计算机二班","赵日天","951034","男","1975-07-21","上海浦东新区");
for(School temp : s){
System.out.println(temp);
}
}

}

我帮你优化了一下你的程序，你可以试着看看我们两个的程序有什么不一样。都做到这地步了你忍心不采纳吗？