编辑代码

public class A {

    public static void main(String[] args){
        Person p1 =new Person("张三",23);

        Person p2 =new Person("张三");
        Person p3 =new Person(23);
    }
}
class Person{
    private String name;
    private int age;

    public Person(String name){
        this.name = name;
        this.age = 0;
    }
    public Person(int age){
        this.age=age;
        this.name="";

    }
    public Person(String name,int age){
        
        this.name = name;
        this.age=age;
    }
 
 


}