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

How can i to add -Xlint:unchecked option or any javac option in Eclipse? this is strange there is no obvious way to 开发者_如何学JAVAdo that in eclipse.

Thanks in advance

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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.

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

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

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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.