What is the Problem in the way that I get input into an Array

Question

Hi Guru's,
Im learning Java and I have written a simple program to get the input and write into an Array. The program is as follows.
import java.util.*;
public class ArraysSort {
     public static void main(String[] args)
          System.out.println("Enter the Number of Entries that you want to Enter");
          Scanner num = new Scanner(System.in);
          int len = num.nextInt();
          int arr[] = null;
          System.out.println(len);
          System.out.println("Enter the Numbers");
          for (int i=0;i<len;i++)
*               *arr[i] = num.nextInt();*
          //System.out.println("The Numbers in Ascending Order are:");
          //Arrays.sort(arr);
          for (int i=0;i<arr.length;i++)
               System.out.println(arr);
Can anyone tell me what is wrong with the Way that I get the input. I have marked the statement in Bold for easy identification.
Thanks a lot for all your help..

Answer 1

VijaySwaminathan wrote:
*               *arr[i] = num.nextInt();*I don't think you can just say
int arr[] = null;and then expect it to insert? Surely first create an array like this....
int arr[] = new int[len];