Chapter 19, Problem 1E

Explanation of Solution

“printDoubled” method:

//definition of "printDoubled" method

public static void printDoubled (int [] a)

{

    //passing an array to the stream

    Arrays.stream (a)

        //calculate the "n" value

        .map (n -> n + n)

        //display the numbers

        .forEach (System.out::println);

    //display the result

    System.out.println ();

}

Explanation:

• In the above code, “printDoubled” is a method name.
• Inside the method, “a” stream by passing it as a parameter to the method “Arrays.stream”.
• The “map” method is used to add the “n” and “n” values.
• Display the value.
• Finally, display the twice the value of each number one by one.