The contains() method of the Java KeyValue Tuple

Java 8Object Oriented ProgrammingProgramming

Use the contains() method to search for a value in the KeyValue tuple. Let us first see what we need to work with JavaTuples. To work with KeyValue class in JavaTuples, you need to import the following package.

import org.javatuples.KeyValue;

Note Download JavaTuples Jar library to run JavaTuples program. If you are using Eclipse IDE, then Right Click Project -> Properties -> Java Build Path -> Add External Jars and upload the downloaded JavaTuples jar file. Refer the below guide for all the steps to run JavaTuples.

Steps: How to run JavaTuples program in Eclipse

The following is an example to implement the contains() method of the KeyValue Tuple in Java.


import org.javatuples.KeyValue;
public class Demo {
   public static void main(String[] args) {
      KeyValue<Integer, String> kValue = KeyValue.with(77, "Rank");
      System.out.println("Key-Value in the KeyValue Tuple = "+kValue);
      boolean res = kValue.contains("Rank");
      System.out.println("Does the value exist in the Tuple? = "+res);


Key-Value in the KeyValue Tuple = [77, Rank]
Does the value exist in the Tuple? = true
Updated on 30-Jul-2019 22:30:25