CJ-14: Sum of the digit of a number

Type the programs in NOTEPAD or DOS prompt itself, for Consol Application.
Type in NETBEANS or ECLIPSE for Window Application.
Here after , I am just typing the programs only..to know more about it , refer

Introduction to JAVA 

before doing any JAVA Programs.

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import java.io.*;

class digitsum

{

public static void main(String args[])

{

     int r,sum=0,n;

     try

     {

DataInputStream x=new DataInputStream(System.in);

System.out.println("Enter a number");

n=Integer.parseInt(x.readLine());

while(n>0)

{

   r=n%10;

   sum=sum+r;

   n=(int)(n/10);

}

System.out.println("sum = "+sum);

     }

     catch(Exception e)

     {

     }

}

}

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Output :

Enter a number :

123

sum = 6