Hash Code for a group of three fields

Question

I have three fields, namely

1. Number1
2. Number2
3. Time

I am trying to write a function in java that returns a unique hash value (

Answer 1

You can just use HashCodeBuilder from commons-lang and not have to worry about doing this by hand anymore.

@Override
public int hashCode() {
 // you pick a hard-coded, randomly chosen, non-zero, odd number
 // ideally different for each class
 return new HashCodeBuilder(17, 37).
   append(Number1).
   append(Number2).
   append(Time).
   toHashCode();
}

btw, it's convention in Java for variable names to start with a lowercase. You're going to find it confusing to name variables things like Number1, Number2, etc., as people will confuse these with the names of types (such as String, Number, Long, etc.).