How to fix a NumberFormatException error?

[Ronak U]

import java.io.*;
 
class  ShellSort
 {
         static void shSort(int a[])
         { 
           int i,k,x,width;
           width=a.length/2;
           while(width>=1)
            {
 
 
              for(k=width;k<a.length;k++)
                {
                   x=a[k];    
                   for(i=k-width;i>=0&&x<a[i];i=i-width)
                       {
                         a[i+width]=a[i];
                       }
                   a[i+width]=x;                                                
                }     
              width=width/2;
            }
 
 
       }
 
 
  public static void main(String args[])throws IOException
 
    {
      int a[],n,i;
      BufferedReader br =new BufferedReader(new InputStreamReader(System.in));
 
 
       System.out.println("enter number of elements");
        n=Integer.parseInt(br.readLine());
        a=new int[n];
        System.out.println("enter elements");
        for(i=0;i<n;++i)
             a[i]=Integer.parseInt(br.readLine());
 
        shSort(a);
 
        System.out.println("sorted list");
        for(i=0;i<n;++i)
           System.out.print(a[i]+"  ");
        System.out.println();
     }
}

[Dheeraj Joshi]

Your code runs fine for me. Here is the output i got.

enter number of elements
5
enter elements
6
7
8
2
1
sorted list
1  2  6  7  8

How are you entering the numbers?

Regards
Dheeraj Joshi