Object中的方法

package com_package1;

public class Person44 {
    private int age;

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }
    Person44(int age)
    {
        this.age = age;
        
    }

}

package com_package1;

public class Person44Demo {
    public static void main(String[]args)
    {
        Person44 p = new Person44(44);
        System.out.println(p);//com_package1.Person44@4f1d0d如果输出的是引用类型的变量那么输出的是字符串
        System.out.println(p.toString());//com_package1.Person44@4f1d0d
        
    }

}

package com_package1;

public class Person44 {
    private int age;

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }
    Person44(int age)
    {
        this.age = age;
        
    }
   public  String toString()
   {
       return "Person:"+age;
       
   }
}

package com_package1;

public class Person44Demo {
    public static void main(String[]args)
    {
        Person44 p = new Person44(44);
        System.out.println(p);//com_package1.Person44@4f1d0d如果输出的是引用类型的变量那么输出的是字符串
        System.out.println(p.toString());//com_package1.Person44@4f1d0d
        
    }

}