How to mark java code such that it's not compiled [duplicate]

Answer 1

I saw this somewhere a while ago:

// /*
class SomeClass{
     int withSomeField;
     ..............
}
// */

And you can put the //s in and and remove them as necessary. It's probably multiline comments that would cause problem if they were in there, though.

Answer 2

static final fields can be use for conditional compilation.

static final boolean DEBUG = false;

if (DEBUG) {
  some code ....
}

some code will be removed by the compiler.

It is also possible to use the assert keyword to enable and disable some part of the code. Use java -ea: .. to control if the code should be enabled or disable. See http://docs.oracle.com/javase/1.5.0/docs/guide/language/assert.html

Answer 3

if(false) works well for me (using Eclipse).

Answer 4

I can't even begin to imagine why this is an issue (as described) but I suspect the easiest thing to do is to grep for // in the code before you compile it (or commit it to your versioning repo). I don't think there's anything in eclipse (if that's what you're using) to help you and I'm almost positive that java has no built in mechanism like the one you're describing in C.

Answer 5

you can just use Java Preprocessor and I guess it will be better way than flags http://code.google.com/p/java-comment-preprocessor/ flags of course allow to cut and to add blocks on the compilation phase but preprocessor allows to make the process much more flexible

Answer 6

There are no pre-processor directives in Java. Your best choice is commenting out code.