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From: Lew <lewbloch@gmail.com>
Newsgroups: comp.lang.java.programmer
Subject: Re: When running Ant on command line, how to not-show its WARNING messages and only show ERROR message?
Date: Fri, 9 Dec 2011 17:46:13 -0800 (PST)
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Xref: x330-a1.tempe.blueboxinc.net comp.lang.java.programmer:10636

www wrote:
> I am running Ant on command line, there are many, many WARNING
> messages, cluttering my screen:

That's because there are many, many bad code idioms cluttering up your prog=
ram.

>     [javac] xx.java:48: warning: [unchecked] unchecked call to
> <K1,V1>build(com.google.common.cache.CacheLoader<? super K1,V1>) as a
> member of the raw type com.google.common.cache.CacheBuilder
>     [javac]         return builder.build(new
> CacheLoader<LocationAndDataTypeIdentifier, IdentifierZipFileHandler>()
>     [javac]                             ^
>     [javac] www.java:48: warning: [unchecked] unchecked conversion

... such as improper generic conversions.

I'm guessing there's a type relationship problem between the 'CacheLoader' =
reference you showed us and the return type of the method, which you declin=
ed to show us.

>     [javac] found   : com.google.common.cache.Cache
>     [javac] required:
> com.google.common.cache.Cache<ohd.hseb.hefs.pe.tools.LocationAndDataTypeI=
dentifier,ohd.hseb.hefs.pe.acceptance.IdentifierZipFileHandler>
>=20
> ...
>=20
>     [javac] 1 error
>     [javac] 52 warnings
>=20
> BUILD FAILED
> /a/b/c/build.xml:106: Compile failed; see the compiler error output
> for details.
>=20
> I hope to make these warning message go away. I cannot see the
> compiler error either. There is no a output file. Should the error be
> on the screen?

You show us some of the error messages that you say "clutter up your screen=
".  Doesn't that count as "on the screen"?

What do you mean "no a output file"?

Ant reports all javac output in its output.  Since you show us some of your=
 output, I conclude that the thing you want to see is in your output, just =
not in the part you deigned to share.

I've used Ant lots of times to compile, build and run Java programs.  The o=
utput shows up on the screen just as you showed it, every time, unless redi=
rected.  The output is the literal output of the 'javac' compiler, in the c=
ase of compilation, and therefore contains all the information you can get =
to track down your many, many bugs.

--=20
Lew