Add a value to Pair Tuple in Java

Java 8Object Oriented ProgrammingProgramming

The addAtX() method is used to add a value at a particular position represented by X here. For example, addAt0() at 0 index, addAt1() at 1st index, etc.

Let us first see what we need to work with JavaTuples. To work with Pair class in JavaTuples, you need to import the following package −

import org.javatuples.Pair;

Here we have also used the Triplet class, therefore import the following package −

import org.javatuples.Triplet;

NoteSteps to download and run JavaTuples program If you are using Eclipse IDE to run Pair Class in JavaTuples, then Right Click Project → Properties → Java Build Path → Add External Jars and upload the downloaded JavaTuples jar file.

The following is an example −


import org.javatuples.Pair;
import org.javatuples.Triplet;
public class Demo {
   public static void main(String[] args) {
      Pair < String, String > p = Pair.with("Mobile", "Desktop");
      System.out.println("Initial = " + p);
      Triplet < String, String, String > res = p.addAt0("Tablet");
      System.out.println("Result = " + res);


Initial = [Mobile, Desktop]
Result = [Tablet, Mobile, Desktop]
Published on 18-Mar-2019 06:50:50