Login | Register   
RSS Feed
Download our iPhone app
Browse DevX
Sign up for e-mail newsletters from DevX

By submitting your information, you agree that devx.com may send you DevX offers via email, phone and text message, as well as email offers about other products and services that DevX believes may be of interest to you. DevX will process your information in accordance with the Quinstreet Privacy Policy.

Tip of the Day
Language: Java
Expertise: Intermediate
Mar 27, 2000



Building the Right Environment to Support AI, Machine Learning and Deep Learning

Use Conditional Compilation for Debugging J++ 6.0 Applications

The J++ 6.0 includes the ability to do conditional compilation, a mechanism for debugging code. J++'s conditional compilation allows you to include or exclude entire blocks of code at run time using the conditional directives #if, #else, #endif, #define, and #undef. Here's an example of how conditional directives work:
#define DEBUG
   System.out.println("We have a problem");
   System.out.println("All's well");
The #define statement sets the identifier DEBUG (put any name) to true. That would cause the statement within the #if block to execute. Simply removing the #define statement, or changing it to #undef DEBUG, will cause the #else block to execute. Here are a few examples of why it's important:
  • Include diagnostic code during development, and then exclude it all at run time by simply removing the one #define statement.
  • Exclude code that you think you may want to include again at a later date.
  • Switch among several code sections to experiment with different implementations by #define-ing different identifiers.
You can also use expressions with the #if and #else directives, just as you can with the standard Java if/else structure.
Manoj K.
Comment and Contribute






(Maximum characters: 1200). You have 1200 characters left.



Thanks for your registration, follow us on our social networks to keep up-to-date