Overriding equal method

In java when we use equals method to compare two objects it returns true only if these referring to same memory location.

Code

public class OverrideEqual{

public static void main(String[] args){

Person p1= new Person("John",17);
Person p2= new Person("John",17);
if(p1.equals(p2)){

System.out.println("p1 equals to p2");

}else{

System.out.println("p1 is not equals to p2");

}

}

}

class Person{

String name;
int age;

        Person(String name,int age){

this.name=name;
this.age=age;

}

}

Output:
 p1 is not equals to p2

So if we want to compare two objects according to the states or values then we have to override the equals method.

Code:

public class OverrideEqual{

public static void main(String[] args){

Person p1= new Person("John",17);
Person p2= new Person("John",17);
if(p1.equals(p2)){

System.out.println("p1 equals to p2");

}else{

System.out.println("p1 is not equals to p2");

}

}

}

class Person{

String name;

int age;

       Person(String name,int age){

this.name=name;
this.age=age;

}

      @Override
       public boolean equals(Object obj){

if(obj==this){

return true;

} 

if( !(obj instanceof Person) ){

return false;

} 

Person p=(Person)obj;

             
               if(this.name==p.name && this.age==p.age){

return true;

}

               return false;

}

}

Output:
p1 equals to p2