public static int compareLong(long o1, long o2) {
    	return Long.compare(o1, o2);
    }
@Test
	public void testCompareLong() {
		Assert.assertEquals(0, NumberUtils.compareLong(0L, 0L));
		Assert.assertEquals(1, NumberUtils.compareLong(9L, 0L));
		Assert.assertEquals(-1, NumberUtils.compareLong(0L, 9L));
		Assert.assertEquals(-1, NumberUtils.compareLong(-9L, 0L));
		Assert.assertEquals(1, NumberUtils.compareLong(0L, -9L));
	}