CJ-15:Numbers divisible by 7, and its sum(1)

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.

***********************************************************************************************

import java.io.*;
class div
{
public static void main(String args[])
{
   int sum=0,ct=0,n,i=0;
   try
   {
DataInputStream s=new DataInputStream(System.in);
System.out.println("Enter Limit :");
n=Integer.parseInt(s.readLine());
System.out.println("Numbers divisible by 7 are :");
do
{
   if(i%7==0)
   {
System.out.println(i);
ct++;
sum=sum+i;
   }
   i++;
}
while(i<=n);
System.out.println("Sum = "+sum);
System.out.println("Total Numbers divisible by 7 is : "+ct);
    }
    catch(Exception e)
    {
    }
}
}   

=========================================================================

Output :

Enter Limit:

50

Numbers divisible by 7 are :

0

7

14

21

28

35

42

49
Sum = 196

Total Numbers divisible by 7 is : 8

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.

***********************************************************************************************

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)

     {

     }

}

}

=========================================================================

Output :

Enter a number :

123

sum = 6