which code is hashcode

[saikrishna cinux]

public class HashCode {
 
    public static int hashCode(String s) {
        int hash = 0;
        for (int i = 0; i < s.length(); i++)
            hash = (31 * hash) + s.charAt(i);
        return hash;
    }
 
    public static void main(String args[]) {
        String s = args[0];
        System.out.println( System.identityHashCode(new HashCode()));
        System.out.println( new HashCode());
        System.out.println( (new HashCode()).hashCode());
}
 
}
 

hi, here i am displaying a hashcode in three ways but which is the actual hashcode here
please sombody tell me the actual hashcode...
thanks in advance

[ak pillai]

All the above call the default hashCode method in your Object class. If you need to provide your own hashCode method then it should be an instance method with no argument as shown below:

public  int hashCode() {
int hash = 0;
                //hash = your implementation of hash 
return hash;
}

If you override the hashCode() method remember to override equals() method as well. If 2 objects are equal, then they should produce the same hashcode but the reverse is not true.