### Question:
IdentifierUtil { public static String createUniqueName(String item) { String n1 = UUID.randomUUID().toString(); String n2 = UUID.nameUUIDFromBytes(item.getBytes()).toString(); return String.format("%s-%s", new Object[]{n2.substring(24), n1}); }  static String createUniqueName(String item); static String createUniqueName(String item, int length);  }### Answer:
@Test public void testId() { String name1 = IdentifierUtil.createUniqueName("test", 10); String name2 = IdentifierUtil.createUniqueName("test", 10); Assert.assertNotEquals(name1, name2); }