TreeMap containsValue() Method in Java With Examples Last Updated : 09 Jun, 2022 Comments Improve Suggest changes Like Article Like Report In Java, containsValue() method of the TreeMap class is used to check whether a particular value is being mapped by any key in the TreeMap. It takes the value as a parameter and returns True if that value is mapped by any of the keys in the map. --> java.util Package --> TreeMap class --> containsValue() Method Syntax: Tree_Map.containsValue(Object Value) Parameters: The value of Object type and refers to the value whose mapping is supposed to be checked by any key inside the map. ( Only one parameter) Return Type: A boolean value, true if the mapping of the value is detected else false. Note: In java, while returning boolean values are returned as true false only not as 0 and 1 as it is not allowed so do will throw error at compilation. Example 1: Mapping String Values to Integer Keys. Java // Java Program to Illustrate containsValue() Method // of TreeMap class // Importing required classes import java.util.*; // Main class public class GFG { // main driver method public static void main(String[] args) { // Creating an empty TreeMap by // declaring object of integer and string pairs TreeMap<Integer, String> tree_map = new TreeMap<Integer, String>(); // Mapping string values to int keys // using put() method tree_map.put(10, "Geeks"); tree_map.put(15, "4"); tree_map.put(20, "Geeks"); tree_map.put(25, "Welcomes"); tree_map.put(30, "You"); // Printing the elements of TreeMap System.out.println("Initial Mappings are: " + tree_map); // Checking for custom value in map // using containsValue() method // Say for the Value 'Geeks' System.out.println( "Is the value 'Geeks' present? " + tree_map.containsValue("Geeks")); // Checking for the Value 'World' System.out.println( "Is the value 'World' present? " + tree_map.containsValue("World")); } } OutputInitial Mappings are: {10=Geeks, 15=4, 20=Geeks, 25=Welcomes, 30=You} Is the value 'Geeks' present? true Is the value 'World' present? false Example 2: Mapping Integer Values to String Keys. Java // Java Program to illustrate containsValue() Method // of TreeMap class // Importing required classes import java.util.*; // Main class public class GFG { // Main driver method public static void main(String[] args) { // Creating an empty TreeMap by // declaring object of string, integer pairs TreeMap<String, Integer> tree_map = new TreeMap<String, Integer>(); // Mapping int values to string keys // using put() method tree_map.put("Geeks", 10); tree_map.put("4", 15); tree_map.put("Geeks", 20); tree_map.put("Welcomes", 25); hastree_map_map.put("You", 30); // Printing the elements of TreeMap System.out.println("Initial Mappings are: " + tree_map); // Checking for the Value '10' // using containsValue() method System.out.println("Is the value '10' present? " + tree_map.containsValue(10)); // Checking for the Value '30' System.out.println("Is the value '30' present? " + tree_map.containsValue(30)); // Checking for the Value '40' System.out.println("Is the value '40' present? " + tree_map.containsValue(40)); } } Output: Note: Similarly the same operation can be performed with any type of Mappings with variation and combination of different data types. Comment More infoAdvertise with us Next Article TreeMap entrySet() Method in Java chinmoy lenka Follow Improve Article Tags : Misc Java Java-Collections Java - util package java-TreeMap +1 More Practice Tags : JavaJava-CollectionsMisc Similar Reads TreeMap in Java TreeMap is a part of the Java Collection Framework. It implements the Map and NavigableMap interface and extends the AbstractMap class. It stores key-value pairs in a sorted order based on the natural ordering of keys or a custom Comparator. It uses a Red-Black Tree for efficient operations (add, re 11 min read Java TreeMap clear() Method The clear() method is a built-in method of the TreeMap class in Java of the java.util package. This method is used to remove all key-value mappings from the TreeMap. 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