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Java TreeMap containsValue() Method with Example

TreeMap Class containsValue() method: Here, we are going to learn about the containsValue() method of TreeMap Class with its syntax and example.
Submitted by Preeti Jain, on February 19, 2020

TreeMap Class containsValue() method

  • containsValue() method is available in java.util package.
  • containsValue() method is used to check whether this TreeMap associates at least one key element for the given value element (val_ele) or not.
  • containsValue() method is a non-static method, it is accessible with the class object only and if we try to access the method with the class name then we will get an error.
  • containsValue() method does not throw an exception at the time of returning value element for the given key element.

Syntax:

    public boolean containsValue(Object val_ele);

Parameter(s):

  • Object val_ele – represents the value element whose existence is to be checked in this TreeMap.

Return value:

The return type of the method is boolean, it returns true when this TreeMap holds mappings at least one key element for the given value element (val_ele) otherwise it returns false.

Example:

// Java program to demonstrate the example 
// of boolean containsValue(Object val_ele) 
// method of TreeMap

import java.util.*;

public class ContainsValueOfTreeMap {
    public static void main(String[] args) {
        // Instantiates a TreeMap object
        NavigableMap < Integer, String > tree_map = new TreeMap < Integer, String > ();

        // By using put() method is to add
        // key-value pairs in a TreeMap
        tree_map.put(10, "C");
        tree_map.put(20, "C++");
        tree_map.put(50, "JAVA");
        tree_map.put(40, "PHP");
        tree_map.put(30, "SFDC");

        // Display TreeMap 
        System.out.println("TreeMap: " + tree_map);

        // By using containsValue() method is to 
        // check whether atleast one key element
        // associated with the given value element or not 
        boolean status = tree_map.containsValue("JAVA");

        // Display Status
        System.out.println("tree_map.containsValue(JAVA): " + status);
    }
}

Output

TreeMap: {10=C, 20=C++, 30=SFDC, 40=PHP, 50=JAVA}
tree_map.containsValue(JAVA): true






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