TreeMap operations

Check if a value exists in Treemap

TreeMap treeMap = new TreeMap();

treeMap.put("1", "One");

treeMap.put("2", "Two");

treeMap.put("3", "Three");

System.out.println(treeMap.containsValue("Three"));

// Get lowest and highest key stored

System.out.println("Lowest key: " + treeMap.firstKey());

System.out.println("Highest key: " + treeMap.lastKey());

Get keys and values from TreeMap

Set set = treeMap.entrySet();

for (Map.Entry entry : set) {

     System.out.print(entry.getKey() + " : " + entry.getValue());

}

Get Synchronized Map

Map map = Collections.synchronizedMap(treeMap);

Removing element from TreeMap

System.out.println("Size of TreeMap after addition : " 

                     + treeMap.size());

treeMap.remove("2");

System.out.println("Size of TreeMap after removal : " 

                     + treeMap.size());