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Optional is a public final class which is used to deal with NullPointerException in Java Application.

import java.util.Optional;

public class OptionalTest {
    public static void main(String args[]) {
        Integer[] numArray= new Integer[5];
        // System.out.println(numArray[3].toString()); // It throws java.lang.NullPointerException
        Optional<Integer> optional = Optional.ofNullable(numArray[3]);
        if(optional.isPresent()) {
            System.out.println(numArray[3].toString());
        }
    }

}