Difference Between Sum of squares and squares of sum

package com.nano.SumOfSquares;
import java.io.DataInputStream;
public class SumOfSquares {

/**
*
* Author : Karthik.T
* Date   : 16-07-2012
*/
public static void main(String[] args) {
try
{
int n,sum_of_Squares,Squares_of_sum,isum,isquare;
isum=0;
isquare=0;
System.out.println("Difference Between Sum of Square and Square of Sum ");
System.out.println("Condition : No conditions");
do
{
System.out.println("Enter the Limit : ");
DataInputStream g=new DataInputStream(System.in);
n=Integer.parseInt(g.readLine());
for(int i=1;i<=n;i++)
{
isum=isum+(i*i);
isquare=isquare+i;
}

System.out.println("Difference Between Sum Of Square Of "+n+" And Square Of Sum Of "+n+" is: "+  ((isquare*isquare)-isum));
}
while(true);
}
catch(Exception e)
{
}
}
}