java left logo
java middle logo
java right logo
 

Home arrow Java SE Tips
 
 
Main Menu
Home
Java Tutorials
Book Reviews
Java SE Tips
Java ME Tips
Java EE Tips
Other API Tips
Java Applications
Java Libraries
Java Games
Java Network
Java Forums
Java Blog




Most Visited Tips
Java SE Tips
Java ME Tips
Java EE Tips
Other API Tips
Java Applications
Java Libraries
Java Games
Book Reviews
Top Rated Tips
Java SE Tips
Java ME Tips
Java EE Tips
Other API Tips
Java Applications
Java Libraries
Java Games
Book Reviews


Statistics
Registered Users: 3947
Java SE Tips: 614
Java ME Tips: 202
Java EE Tips: 183
Other API Tips: 779
Java Applications: 298
Java Libraries: 209
Java Games: 16
Book Reviews:
 
 
 
How to use Exception classes to validate Numbers E-mail
User Rating: / 48
PoorBest 

This code will show how to use NumberForamtException to validate whether given string contains a valid integer or not.

parseInt() method of the Integer object uses to convert a given string to the integer. This method throws a NubmerPointerException if the given string is not a valid integer.

public class NmbrVldExp {

    public static boolean validateNumber(String num) {
        try {
            Integer.parseInt(num);
            return true;
        catch (Exception e) {
            return false;
        }
    }

    public static void main(String[] args) {
        String num="6";

        if(validateNumber(num)){
            System.out.println("Correct Number");
        }else{
            System.out.println("Incorrect Number");            
        }
    }
}

 Related Tips

 
< Prev   Next >

Page 1 of 0 ( 0 comments )

You can share your information about this topic using the form below!

Please do not post your questions with this form! Thanks.


Name (required)


E-Mail (required)

Your email will not be displayed on the site - only to our administrator
Homepage(optional)



Comment Enable HTML code : Yes No



 
       
         
     
 
 
 
   
 
 
java bottom left
java bottom middle
java bottom right
RSS 0.91 FeedRSS 1.0 FeedRSS 2.0 FeedATOM FeedOPML Feed

Home - About Us - Privacy Policy
Copyright 2005 - 2008 www.java-tips.org
Java is a trademark of Sun Microsystems, Inc.