Rewrite Fig 6.2 so that the size of the array is specified by the first command-

Question

Rewrite Fig 6.2 so that the size of the array is specified by the first command-line argument. If no command-argument is supplied, use 10 as the default size of the array.

I // Fig. 7.2: InitArray.java 2 /Initializing the elements of an array to default values of zero 4 public class InitArray 6 public static void main(String[] args) 7 // declare variable array and initialize it with an array obje int[] array = new int [10]; // create the array object System.out, printf("%s %8s%n", "Index", "Value"); // column head // output each array element's value 10 12 13 14 15 16 17 for (int counter-0; counter

Explanation / Answer

public class InitArray

{

    public static void main(String[] args)

    {

        int[] array;

       

        // if no argument is passed

        if(args.length == 0)

            array = new int[10];

        else

        {

            // get the first argument and convert it into int

            int len = Integer.parseInt(args[0]);

           

            array = new int[len];

        }

       

        System.out.printf("%s%s%n", "Index", "Value");

       

        for(int counter = 0 ; counter < array.length ; counter++ )

            System.out.printf("%5d%8d%n", counter, array[counter]);

       

    }

}

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