Write an application that prompts the user to enter a number to use as an array

Question

Write an application that prompts the user to enter a number to use as an array size, and then attemp to declare an array using the entered size. If the array is created successfully, display an appropriate message. Java generates a NegativeArraySizeException if you attempt to create an array with a negative size, and it creates a NumberFormatException if you attemp to create an array using a nonnumeric value for the size. Use a catch block that executes if the array size is nonnumeric or negative, display a message that indicates the array was not created. Class should be NegativeArray.

Should be written in java.

Please follow directions.

Explanation / Answer

Required solution:

import java.util.Scanner;

//NegativeArray class
public class NegativeArray
{
   public static void main(String[] args)
   {
       System.out.print("Enter the size of the array");
       Scanner sc=null;
       try
       {
           sc=new Scanner(System.in);
           String sizeInput=sc.nextLine();
           int size=Integer.parseInt(sizeInput);//may cause NumberFormatException
           int[] array=new int[size];//may cause NegativeArraySizeException
           System.out.println("Array was created");
       }
       catch(NegativeArraySizeException e)
       {
           System.out.println("Array was not created");
       }
       catch(NumberFormatException e)
       {
           System.out.println("Array was not created");
       }
       finally
       {
           sc.close();
       }
   }
}

sample output:

TestCase:1

Enter the size of the array:-9
Array was not created

TestCase:2

Enter the size of the array:abc
Array was not created

TestCase:3

Enter the size of the array:14
Array was created

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