Generating 32-bit Integer Hash Code for 64-bit long values with folding

HashForLong.java

package com.levo.hashing;

public class HashForLong {

	public static void main(String[] args) {
		long longValueOne = new Long(Integer.MAX_VALUE) + new Long(Integer.MAX_VALUE) + new Long(10); 
		long longValueTwo = 8;
		
		// Following hashing function is not working, different numbers return same result
		System.out.println("Hash[dummyHash] for longValueOne : " + dummyHash(longValueOne));
		System.out.println("Hash[dummyHash] for longValueTwo : " + dummyHash(longValueTwo));
		
		// hashing function with folding, differnt numbers different hash codes
		System.out.println("Hash[folding]   for longValueOne : " + folding(longValueOne));
		System.out.println("Hash[folding]   for longValueTwo : " + folding(longValueTwo));
	}
	
	private static int dummyHash(long value) {
		return (int)value;
	}
	
	private static int folding(long value) {
		long bits = Double.doubleToLongBits(value);
		return (int)( bits ^ (bits>>32));
	}

}

Output;

Hash[dummyHash] for longValueOne : 8
Hash[dummyHash] for longValueTwo : 8
Hash[folding] for longValueOne : 1097859072
Hash[folding] for longValueTwo : 1075838976