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What is KeyValue class in JavaTuples?
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 −
Steps − How 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]
Updated on: 30-Jul-2019
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