Answer to Question #286058 in Java | JSP | JSF for Hamza

Question

Page 8

Task #8: Using Arrays and Methods

In this task, you are being asked to write methods that manipulate arrays in Java.

Write a method called fillArray() which will take an integer array as input and the fills the array

with the user entered numbers.

You may use the following header for this method:

static void fillArray(int[] array)

Write a method called absoluteArray() which will take an integer array as input and takes the

absolute of all the array elements.

You may use the following header for this method:

static void absoluteArray(int[] array)

Take a number from the user as the size of the array, call the method fillArray(), then call the

method absoluteArray().

NOTE: Perform input validation so that the array size must be greater than 0.

1. Create a program called ArrayAbsoluteLab1.java.

2. Create appropriate variables and assign values using a Scanner object.

3. Correctly display appropriate messages.

Answer 1

import java.util.InputMismatchException;
import java.util.Scanner;


public class ArrayAbsoluteLab1 {
    private static void fillArray(int[] array) {
        Scanner input = new Scanner(System.in);


        System.out.println("Enter " + array.length + " numbers to fill array:");
        for (int i = 0; i < array.length; i++) {
            while (true) {
                try {
                    array[i] = input.nextInt();
                    break;
                } catch (InputMismatchException e) {
                    System.out.println("The entered number is incorrect, please try again...");
                    input.next();
                }
            }
        }
    }


    private static void absoluteArray(int[] array) {
        for (int i = 0; i < array.length; i++) {
            System.out.println("Absolute value of number " + array[i] + " is " + Math.abs(array[i]));
        }
    }


    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        int arrayLength;


        System.out.println("Enter array length:");
        while (true) {
            try {
                arrayLength = input.nextInt();


                if (arrayLength <= 0) {
                    System.out.println("The entered array length is incorrect, please try again...");
                    continue;
                }
                break;
            } catch (InputMismatchException e) {
                System.out.println("The entered array length is incorrect, please try again...");
                input.next();
            }
        }


        int array[] = new int[arrayLength];


        fillArray(array);
        absoluteArray(array);
    }
}