What is KeyValue class in JavaTuples?

Java 8Object Oriented ProgrammingProgramming

A KeyValue class is a Tuple of 2 elements i.e. a key and value. It is in the JavaTuples library. The following is the declaration −

public final class KeyValue<P, Q>
extends Tuple
implements IValueKey<P>, IValueValue<Q>

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 −

StepsHow to run JavaTuples program in Eclipse

The following is an example to implement the KeyValue class in Java −

Example

import org.javatuples.KeyValue;
public class Demo {
   public static void main(String[] args) {
      KeyValue<Integer, String> value = new KeyValue<Integer, String>(5, "Points");
      System.out.println("Elements in the KeyValue Tuple = "+value);
   }
}

Output

The following is the output:
Elements in the KeyValue Tuple = [5, Points]
raja
Updated on 30-Jul-2019 22:30:25

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