How to add -Xlint:unchecked option or any javac option in Eclipse?

Question

How can i to add -Xlint:unchecked option or any javac option in Eclipse? this is strange there is no obvious way to do that in eclipse.

Thanks in advance

Answer 1

If you are doing builds with ant in Eclipse (as I was today), then it's really not a setting in Eclipse but an additional setting/flag(?) on the javac task.

Found via Darins' helpful hint here:

Specifically compilerarg nested element.

Here's how to add it, found on the Apache javac task page

<javac srcdir="${src.dir}"
     destdir="${classes.dir}"
     classpathref="libraries">
   <compilerarg value="-Xlint"/>
</javac> 

Hope this helps someone else, as I didn't quite get it at first myself.

Answer 2

First, go to the Preferences window. If you're running Windows or Linux, it'll be under the 'Window' menu, if you're using Mac OSX it'll be under the 'Eclipse' menu. Then go to Java -> Compiler -> Errors / Warnings -> Generic Types and you'll see three options for compiler warnings / errors on unchecked types and operations. Chang them from error or warning to ignore.

Answer 3

Eclipse does not use the javac compiler - it has its own compiler.

Answer 4

-Xlint:unchecked is set to warning by default in eclipse