Here you can find the source of hashCode(final int seed, final int hashcode)
public static int hashCode(final int seed, final int hashcode)
//package com.java2s; //License from project: Apache License public class Main { public static final int HASH_OFFSET = 37; public static int hashCode(final int seed, final int hashcode) { return seed * HASH_OFFSET + hashcode; }/*w w w. j a v a 2 s . c o m*/ public static int hashCode(final int seed, final boolean b) { return hashCode(seed, b ? 1 : 0); } public static int hashCode(final int seed, final Object obj) { return hashCode(seed, obj != null ? obj.hashCode() : 0); } }