public static <T> T getLast(Collection<T> collection) {
		return get(collection, -1);
	}
@Test
	public void getLastTest() {
		// 测试：空数组返回null而不是报错
		final List<String> test = CollUtil.newArrayList();
		final String last = CollUtil.getLast(test);
		assertNull(last);
	}