NavigableMap decendingMap = tm.descendingMap();
String key = new Integer(-1).toString();
assertNull(decendingMap.ceilingEntry(key));
for (int i = 0; i < objArray.length; i++) {
key = objArray[i].toString();
assertEquals(objArray[i], decendingMap.ceilingEntry(key).getValue());
}
key = new Integer(1000).toString();
assertEquals(100, decendingMap.ceilingEntry(key).getValue());
key = new Integer(1001).toString();
assertEquals(100, decendingMap.ceilingEntry(key).getValue());