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Tip of the Day
Expertise: Beginner
Sep 23, 1997

Allow the Java Compiler to Remove Debug Code

The Java compiler will optimize your application by removing code that can never be executed. If you include a class in your application such as the following:
 public class Debug
   public static final boolean DEBUG = true;
You can insert sections of debug code in your classes inside an "if" block:
 . . .
if ( Debug.DEBUG )
   // debug code
The code inside this block will be included in your class when the constant DEBUG is true. When you change it to false and recompile your classes, the compiler will not only not allow the debug code to be executed, it will remove the code from your *.class files. You can use this feature to include different types of code also. You could have debug code, tracing code, assertion code, etc.
Randy Kahle
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