How to provide preprocessor directives in Java

Question

CHow can I correctly provide the following functionally from C# in Java?

[C#]

#define PRODUCTION //Change from sandbox to production to switch between both systems.

#if SANDBOX
    using NetSuite.com.netsuite.sandbox.webservices;
#endif

#if PRODUCTION
    using NetSuite.com.netsuite.webservices;
#endif

Answer 1

Java doesn't have a preprocessor - so the simple answer is that you can't.

This sort of thing is normally handled in Java using Dependency Injection - which is both more powerful and more flexible.

http://www.vogella.com/articles/DependencyInjection/article.html

Answer 2

Java doesn't have a preprocessor, yet that doesn't mean that you can't run Java code through cpp - though it would not be supported by any tools, AFAIK.

Answer 3

Use Dependency Injection/Inversion of Control. Depending on your actual needs, you might be able to get away with something as simple as property file/environment variables to control things.

You might be able to use static defines around some types of initialization/code.

Answer 4

You can use something based on <#FreeMarker>.

source: https://github.com/mkowsiak/jpp

However, this solution will require pre-compilation step, if you want to change the code. On the other hand, you can still create code that works without pre-processing steps - sort of "default" compilation.