Object中的方法

1、equals（）

2、toString（）

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
 
    }
 
}