package 任务1;
class 任务1 {
private String name;
private int age;
char sex;
public 任务1() {
}
public void set任务1(String name,int age,char sex) {
this.name = name;
this.age = age;
this.sex = sex;
}
public void show() {
System.out.println("姓名:"+name+"年龄:"+age+"性别:"+sex);
}
}
class Student extends 任务1{
private int sno;
String department;
public Student() {
}
private void set任务1(int sno,String department) {
this.sno = sno;
this.department = department;
System.out.println("该生 学号:"+sno+"所在系:"+department);
}
}
public class StudentExample {
public static void main(String args[]) {
Student s = new Student();
s.set任务1("奥巴马",54,'男');
s.show();
s.setStudent(1001,"大数据系");
}
}
你有参构造写的有问题
public class StudentExample 的public去掉