Create hash from string and int

Question

I remember eclipse and idea have this template to automatically create an object\'s hashCode based on its attributes.

One of the strategies if a number and a string is u

Answer 1

Eclipse always does roughly the same hashing function, here's an example for a class with an in and String as fields

    public int hashCode() {
        final int prime = 31;
        int result = 1;
        result = prime * result + this.interger;
        result = prime * result + ((this.string == null) ? 0 : this.string.hashCode());
        return result;
    }

They always pick 31 as the prime, and then multiple by build in hash functions or the value if its a primitive. Something like this wouldn't be hard to create as a method.

     public int hashCode(Object ... things) {
         final int prime = 31;
         int result = 1;
         for(Object thing : things) {
             result = prime * result + thing.hashCode();
         }
         return result;
     }