@Test public void replace() { HazelcastClient hClient = getHazelcastClient(); IMap<String, String> map = hClient.getMap("replace"); String result = map.put("1", "CBDEF"); assertNull(result); assertEquals("CBDEF", map.replace("1", "CBD")); assertNull(map.replace("2", "CBD")); assertFalse(map.replace("2", "CBD", "ABC")); assertTrue(map.replace("1", "CBD", "XX")); }