Question

创建一个student类，有三个成员变量点string num,string name ,int age

重载构造方法(3个），并调用重载入构造方法的对象
创建一个printInto()方法，将对象基本信息打印出来

Answer 1

package Object;

public class Student {
private String num;
private String name;
private int age;
public Student(){
this("println-->num","println-->name");
}
public Student(String num,String name){
this(22);
this.name=name;
this.num=num;
}
public Student(int age){
this.age=age;
}
public void printlnto(){
System.out.println(num);
System.out.println(name);
System.out.println(age);
}
public static void main(String[] args){
new Student().printlnto();
}
}