SortedMap conatinsValue() method in Java with Examples

The containsValue() method is used to check whether a particular value is being mapped by a single or more than one key in the SortedMap. It takes the value as a parameter and returns True if that value is mapped by any of the keys in the map.

Syntax:

boolean 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.

Note: The containsValue() method in SortedMap is inherited from the Map interface in Java.

Below programs illustarte the 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 Map_Demo {
    public static void main(String[] args)
    {
  
        // Creating an empty SortedMap
        SortedMap<Integer, String> map
            = new TreeMap<Integer, String>();
  
        // Mapping string values to int keys
        map.put(10, "Geeks");
        map.put(15, "4");
        map.put(20, "Geeks");
        map.put(25, "Welcomes");
        map.put(30, "You");
  
        // Displaying the SortedMap
        System.out.println(
            "Initial Mappings are: "
            + map);
  
        // Checking for the Value 'Geeks'
        System.out.println(
            "Is the value 'Geeks' present? "
            + map.containsValue("Geeks"));
  
        // Checking for the Value 'World'
        System.out.println(
            "Is the value 'World' present? "
            + map.containsValue("World"));
    }
}

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Output:

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

Program 2: Mapping Integer Values to String Keys.

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// Java code to illustrate
// the containsValue() method
  
import java.util.*;
  
public class Map_Demo {
    public static void main(String[] args)
    {
  
        // Creating an empty SortedMap
        SortedMap<String, Integer> map
            = new TreeMap<String, Integer>();
  
        // Mapping int values to string keys
        map.put("Geeks", 10);
        map.put("4", 15);
        map.put("Geeks", 20);
        map.put("Welcomes", 25);
        map.put("You", 30);
  
        // Displaying the SortedMap
        System.out.println(
            "Initial Mappings are: "
            + map);
  
        // Checking for the Value '10'
        System.out.println(
            "Is the value '10' present? "
            + map.containsValue(10));
  
        // Checking for the Value '30'
        System.out.println(
            "Is the value '30' present? "
            + map.containsValue(30));
  
        // Checking for the Value '40'
        System.out.println(
            "Is the value '40' present? "
            + map.containsValue(40));
    }
}

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Output:

Initial Mappings are: {4=15, Geeks=20, Welcomes=25, You=30}
Is the value '10' present? false
Is the value '30' present? true
Is the value '40' present? false

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

Reference: https://docs.oracle.com/javase/7/docs/api/java/util/Map.html#containsValue(java.lang.Object)




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