TreeMap containsValue() Method in Java

The java.util.TreeMap.containsValue() method 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.

Syntax:

Tree_Map.containsValue(Object Value)

Parameters: The method takes just one parameter Value of Object type and refers to the value whose mapping is supposed to be checked by any key inside the map.

Return Value: The method returns boolean true if the mapping of the value is detected else false.

Below programs are used to illustrate the working of java.util.TreeMap.containsValue() Method:
Program 1: Mapping String Values to Integer Keys.

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// Java code to illustrate the containsValue() method
import java.util.*;
  
public class Tree_Map_Demo {
    public static void main(String[] args)
    {
  
        // Creating an empty TreeMap
        TreeMap<Integer, String> tree_map = new TreeMap<Integer, String>();
  
        // Mapping string values to int keys
        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");
  
        // Displaying the TreeMap
        System.out.println("Initial Mappings are: " + tree_map);
  
        // Checking 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"));
    }
}

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Program 2: Mapping Integer Values to String Keys.

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// Java code to illustrate the containsValue() method
import java.util.*;
  
public class Tree_Map_Demo {
    public static void main(String[] args)
    {
  
        // Creating an empty TreeMap
        TreeMap<String, Integer> tree_map = new TreeMap<String, Integer>();
  
        // Mapping int values to string keys
        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);
  
        // Displaying the TreeMap
        System.out.println("Initial Mappings are: " + tree_map);
  
        // Checking for the Value '10'
        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));
    }
}

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Note: The same operation can be performed with any type of Mappings with variation and combination of different data types.



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