Java Program to check if a particular value exists in TreeMap

Java 8Object Oriented ProgrammingProgramming

To check if a particular value exists in TreeMap, use the containsValue() method.

Create a TreeMap first and add some elements −

TreeMap<Integer,String> m = new TreeMap<Integer,String>();
m.put(1,"PHP");
m.put(2,"jQuery");
m.put(3,"JavaScript");
m.put(4,"Ruby");
m.put(5,"Java");
m.put(6,"AngularJS");
m.put(7,"ExpressJS");

Now, let’s say we need to check that value “Java” exists or not. For that, use the containsValue() method like this −

m.containsValue("Java")

The following is an example to check if a particular value exists in TreeMap −

Example

 Live Demo

import java.util.*;
public class Demo {
   public static void main(String args[]) {
      TreeMap<Integer,String> m = new TreeMap<Integer,String>();
      m.put(1,"PHP");
      m.put(2,"jQuery");
      m.put(3,"JavaScript");
      m.put(4,"Ruby");
      m.put(5,"Java");
      m.put(6,"AngularJS");
      m.put(7,"ExpressJS");
      System.out.println("TreeMap Elements...\n"+m);
      System.out.println("Does value PHP exist in the TreeMap = "+m.containsValue("Java"));
   }
}

Output

TreeMap Elements...
{1=PHP, 2=jQuery, 3=JavaScript, 4=Ruby, 5=Java, 6=AngularJS, 7=ExpressJS}
Does value PHP exist in the TreeMap = true
raja
Published on 30-Jan-2019 12:15:53
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