Basics In Java

import java.io.*;
class neg
{
     public static void main()throws IOException
     {
         DataInputStream k=new DataInputStream(System.in);
         System.out.println("Fill The Array");
         int a[]=new int[10];
         for(int i=0;i<10;i++)
         a[i]=Integer.parseInt(k.readLine());
         int b=0;
         for(int i=0;i<10;i++)
         {
             if(a[i]<0)
             {
                 int t=a[i];
                 for(int j=i;j>b;j--)
                 a[j]=a[j-1];
                 a[b]=t;
                 b++;
             }
         }
         System.out.println("After Arranging");
         for(int i=0;i<10;i++)
         System.out.println(a[i]);
        }
    }