Java Basic - Case-insensitive Collection

TreeHashMap

@Test
public void testTreeMap(){
	Map<String, String> map = new TreeMap<String, String>(String.CASE_INSENSITIVE_ORDER);
	map.put("aBc", "test1");
	map.put("dEf", "test2");
	Assert.assertEquals("test1", map.get("abc"));
	Assert.assertEquals("test2", map.get("dEf"));
}

Spring

public class CaseInsensitiveMap extends TreeMap<String, Object> {
 
	private static final long serialVersionUID = 1L;
 
	public CaseInsensitiveMap(){
		super(String.CASE_INSENSITIVE_ORDER);
	}
}

	<util:map id="restDisplayMap" map-class="com.supermicro.ssm.common.CaseInsensitiveMap">
  		<entry key="xxx1" value="uuuu1"></entry>
  		<entry key="xxx2" value="uuuu2"></entry>
	</util:map> 

TreeSet

@Test
public void testTreeSet(){
	Set<String> s = new TreeSet<String>(String.CASE_INSENSITIVE_ORDER);
	s.add("aBc");
	s.add("deF");
 
	Assert.assertTrue(s.contains("abc"));
	Assert.assertTrue(s.contains("def"));
	Assert.assertFalse(s.contains("abcedf"));
}

Reference

• ArrayList contains case sensitivity