Java Tuple setAt0() method for Unit class

The setAt0() method is used to set the Unit value in JavaTuples and a copy with a new value at index 0.

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

import org.javatuples.Unit;

Note − Steps to download and run JavaTuples program. If you are using Eclipse IDE to run Unit Class in Java Tuples, then Right Click Project ->Properties ->Java Build Path ->Add External Jars and upload the downloaded JavaTuples jar file.

The following is an example −

Example

import org.javatuples.Unit;
public class Demo {
   public static void main(String[] args) {
      Unit < String > u1 = Unit.with("Science!");
      System.out.println("First: " + u1);
      Unit < String > u2 = u1.setAt0("Mathematics!");
      System.out.println("Copied: " + u2);
   }
}

Output

First: [Science!]
Copied: [Mathematics!]