Iterate Through Key-Value Tuple in Java

To iterate through the KeyValue tuple in Java, use the Iterable and loop it through using the for loop. 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 iterate through KeyValue Tuple in Java:

Example

import org.javatuples.KeyValue;
public class Demo {
   public static void main(String[] args) {
      KeyValue<Integer, String> kValue = KeyValue.with(77, "Rank");
      System.out.println("Iterating through the values of the KeyValue Tuple = ");
      for (Object ele : kValue) System.out.println(ele);
      boolean res = kValue.contains("Rank");
      System.out.println("Does the value exist in the Tuple? = "+res);
   }
}

Output

Iterating through the values of the KeyValue Tuple =
77
Rank
Does the value exist in the Tuple? = true