Replication Equals method in Java

Generally, all classes should replicate the Equals method in object. The steps are roughly three-step:

1) Determine whether the address of two objects is consistent

2) Determine if the second object is the same subclass instance

3) Determine whether the content is consistent

classperson{ Public intAge ;  PublicString name;  PublicPerson (intAge , String name) {         This. Age =Age ;  This. Name =name; }     Public Booleanequals (Object obj) {//The first step is to determine whether the two object addresses are consistent        if( This==obj)return true; //determines whether the second object is the same subclass instance        if(! (objinstanceofPerson )) return false; //Judging whether the content is consistentPerson Anotherone =(person) obj; if( This. Name = =NULL&& Anotherone.name! =NULL)            return false; if( This. Name.equals (Anotherone.name) && This. Age = =anotherone.age)return true; return false; }} Public classhello{ Public Static voidMain (string[] args) {person P1=NewPerson ("cherry")); Person P2=NewPerson ("cherry"));    System.out.println (P1.equals (p2)); }       }

Replication Equals method in Java