Set key in the JavaTuples KeyValue class

To set key in the JavaTuples KeyValue class, you need to use the setKey() method. 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 set the key in the KeyValue class value in Java:

Example

import org.javatuples.KeyValue;
public class Demo {
   public static void main(String[] args) {
      KeyValue kValue = KeyValue.with(2, "Rank");
      System.out.println("Key-Value in the KeyValue Tuple = "+kValue);
      KeyValue k = kValue.setKey(10);
      System.out.println("Updated = "+k);
   }
}

Output

Key-Value in the KeyValue Tuple = [2, Rank]
Updated = [10, Rank]