Manual hash code computation

HashCode.java

class HashCode {
    public static void main(String[] args) {
        Object object = new Object();
        printHash(object.hashCode());
        Field field = Unsafe.class.getDeclaredField("theUnsafe");
        field.setAccessible(true);
        Unsafe unsafe = (Unsafe) field.get(null);
        long hashCode = 0;
        for (long index = 7; index > 0; index--) { // First byte is not part of the hash code
            hashCode |= (unsafe.getByte(object, index) & 0x00FF) << ((index - 1) * 8);
        }
        printHash(hashCode); // hashCode == object.hashCode();
    }
    
    private static void printHash(int value) {
        System.out.println("HashCode: " + value + " (0x" + Integer.toHexString(value) + ")");
    }
}