### Question:
ItemComparator implements Comparator, Serializable { public boolean equals(Object obj) { if (!(obj instanceof ItemComparator)) { return false; } ItemComparator other = (ItemComparator) obj; return equalsWithNull(element, other.element) && equalsWithNull(qualifier, other.qualifier) && equalsWithNull(language, other.language) && (max == other.max); } ItemComparator(String element, String qualifier, String language,
            boolean max); int compare(Object first, Object second); boolean equals(Object obj); int hashCode();  }### Answer:
@Test @SuppressWarnings({"ObjectEqualsNull", "IncompatibleEquals"}) public void testEquals() { ItemComparator ic = new ItemComparator("test", "one", Item.ANY, true); ItemComparator target = null; assertFalse("testEquals 0", ic.equals(null)); assertFalse("testEquals 1", ic.equals("test one")); target = new ItemComparator("test1", "one", Item.ANY, true); assertFalse("testEquals 2", ic.equals(target)); target = new ItemComparator("test", "one1", Item.ANY, true); assertFalse("testEquals 3", ic.equals(target)); target = new ItemComparator("test", "one", "es", true); assertFalse("testEquals 4", ic.equals(target)); target = new ItemComparator("test1", "one", Item.ANY, false); assertFalse("testEquals 5", ic.equals(target)); target = new ItemComparator("test", "one", Item.ANY, true); assertTrue("testEquals 6", ic.equals(target)); }