3D pseudorandom number generator (1st try)

Random3D.java

import java.util.Random;

public class Random3D {
	
	private long seed;
	private Random random;
	private long[] masks;
	
	public Random3D(long seed) {
		random = new Random(seed);
		this.seed = seed;
		masks = new long[]{random.nextLong(),random.nextLong(),random.nextLong()};
	}
	
	public long getSeed(long x, long y, long z) {
		long tx = (x^masks[0])<<7;
		long ty = (y^masks[1])<<15;
		long tz = (z^masks[2])<<31;
		long s = this.seed ^ tx ^ ty ^ tz;
		return s;
	}
	
	public long getLong(long x, long y, long z) {
		random.setSeed(this.getSeed(x,y,z));
		return random.nextLong();
	}

	public static void main(String[] args) {
		int dim = 5;
		long[][][] cube0 = new long[1][dim][dim];
		long[][][] cube1 = new long[1][dim][dim];
		Random3D rnd0 = new Random3D(0);
		Random3D rnd1 = new Random3D(1);
		int x = 0;
		for (int y=0;y<dim;y++)
			for (int z=0;z<dim;z++) {
				cube0[x][y][z] = rnd0.getLong(x,y,z);
				cube1[x][y][z] = rnd1.getLong(x,y,z);
			}
		for (int y=0;y<dim;y++) {
			for (int z=0;z<dim;z++)
				System.out.print(cube0[x][y][z]+", ");
			System.out.println();
		}
		System.out.println();
		for (int y=0;y<dim;y++) {
			for (int z=0;z<dim;z++)
				System.out.print((cube0[x][y][z]-cube1[x][y][z])+", ");
			System.out.println();
		}
	}
}