Last Updated : 11 Jul, 2025
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"));
}
}
Initial 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.
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