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

CJ-13: Reverse 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 reverse

{

public static void main(String args[])

{

   int r,n;

   int rev=0;

   try

   {

DataInputStream x=new DataInputStream(System.in);

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

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

while(n>0);

{

   r=n%10;

   rev=rev*10+r;

   n=(int)(n/10);

}

System.out.println("Number Reversed is :"+rev);

    }

    catch(Exception e)

    {

    }

}

}

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

Output :

Enter a number :

143

Number Reversed is :

341

CJ-10: Print a message 5 times-While loop

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 loop1

{

public static void main(String args[])

{

int i=0;

while(i<=4)

{

  System.out.println("Welcome to JAVA");

  i++;

}

}

}

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

Output :

Welcome to JAVA

Welcome to JAVA

Welcome to JAVA

Welcome to JAVA

Welcome to JAVA


Refar Print a message 5 times-Do While loop and Print a message 5 times-For loop also.