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AW: a problem compiling a Java 5 project with generics

AW: a problem compiling a Java 5 project with generics

2006-10-17       - By peter reilly
Reply:     1     2     3     4     5     6     7     8     9     10     >>  

On 10/17/06, Chavdar Botev <cbotev@(protected)> wrote:
> Peter,
>
> I repeated the steps you described and I can confirm that with the
> -classpath argument the compilation fails and without it the
> compilation succeeds. I also tried running javac on "src/test/*.java"
> instead of "src/test/Test3.java". In this case, the compilation
> succeeds with or without -classpath.
>
> I think it looks like some dependency problem.

I have just checked the <javac> revision history,
since the initial checkin (6 years, 9 months), <javac> has always added
the destination path to the classpath for the javac command.

It does not seem to be necessary? but I do not know if
we can remove it without something failing.
Perhaps we can use (yet another) attribute to javac to
disable this behaviour.

Peter

>
> Chavdar
>
>
> On 10/17/06, Chavdar Botev <cbotev@(protected)> wrote:
> > I have opened a bug report at
> > http://issues.apache.org/bugzilla/show_bug.cgi?id@(protected)
> >
> > Thanks,
> > Chavdar
> >
> > On 10/17/06, Peter Reilly <peter.kitt.reilly@(protected)> wrote:
> > > On 10/17/06, Scot P. Floess <floess@(protected)> wrote:
> > > > Failed for me using Fedora Core 5, sun JDK 1.5_08
> > > >
> > > > I don't think its javac as I was able to do this:
> > > >
> > > > touch src/test/Test3.java
> > > > javac -d bin -sourcepath src -classpath bin src/test/Test3.java
> > >
> > > That worked me as well, however I modifed the build script
> > > to do this:
> > >     <javac source="1.5" target="1.5"
> > >            srcdir="src" destdir="build/classes"
> > >            includeantruntime="no"
> > >            debug="yes" fork="yes" executable="${java.home}/../bin/javac
.exe"/>
> > >
> > > and ran ant with -debug to see the exact command line:
> > >
> > > "c:\program files\java\jdk1.6.0\jre\..\bin\javac.exe" -d "C:\Documents
> > > and Settings\reilly\learning\a\compile\build\classes" -classpath
> > > "C:\Documents and Settings\reilly\learning\a\compile\build\classes"
> > > -sourcepath "C:\Documents and Settings\reilly\learning\a\compile\src"
> > > -target 1.5 -g -source 1.5 "C:\Documents and
> > > Settings\reilly\learning\a\compile\src\org\test\Test3.java"
> > >
> > > This failed as well.
> > >
> > > I removed the differences one at a time, when -classpath was removed,
> > > the problem
> > > went away.
> > >
> > > I think that this is a javac problem, but perhaps ant does not need to
set the
> > > classpath attribute when -d is the same as -classpath ?
> > >
> > > Peter
> > >
> > > >
> > > > Javac seems to find everything correctly...but the javac task in ant is
> > > > having difficulties.  One thing to note is that the generics referred to
> > > > by the inner classes are defined in terms of the outer class.
> > > >
> > > > James Abley wrote:
> > > > > Fails for me:
> > > > >
> > > > > Ubuntu Dapper, Ant 1.6.5, Sun JDK 1.5.0_07
> > > > >
> > > > > <project>
> > > > >     <javac srcdir="." destdir="."/>
> > > > > </project>
> > > > >
> > > > > bash:$ ant -v
> > > > > bash:$ touch test/Test3.java
> > > > > bash:$ ant -v
> > > > >
> > > > >     [javac]     /work/ant-test/ant-generics/test/Test3.java
> > > > >     [javac] /work/ant-test/ant-generics/test/Test3.java:8:
> > > > > incompatible types
> > > > >     [javac] found   : test.Base
> > > > >     [javac] required: test.Sub
> > > > >     [javac]         public Sub p() {return this.getV();}
> > > > >
> > > > > Is this a javac issue rather than ANT issue? I can provide more
> > > > > information if required.
> > > > >
> > > > > James
> > > > >
> > > > > Jan.Materne@(protected) wrote:
> > > > >> Also no problems .... on WinXP, Ant 1.6.5 and Java 1.5.0_06-b05.
> > > > >>
> > > > >>> setant 165
> > > > >> Apache Ant version 1.6.5 compiled on June 2 2005
> > > > >>
> > > > >>> setjava 15
> > > > >> Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_06-b05)
> > > > >> Java HotSpot(TM) Client VM (build 1.5.0_06-b05, mixed mode, sharing)
> > > > >>
> > > > >>> del test\*.class
> > > > >>
> > > > >>> ant -v
> > > > >> Project base dir set to: C:\tmp\ant-generics
> > > > >>     [javac] build.xml skipped - don't know how to handle it
> > > > >>     [javac] test\Base.java added as test/Base.class doesn't exist.
> > > > >>     [javac] test\Sub.java added as test/Sub.class doesn't exist.
> > > > >>     [javac] test\Test1.java added as test/Test1.class doesn't exist.
> > > > >>     [javac] test\Test2.java added as test/Test2.class doesn't exist.
> > > > >>     [javac] test\Test3.java added as test/Test3.class doesn't exist.
> > > > >>     [javac] Compiling 5 source files to C:\tmp\ant-generics
> > > > >>     [javac] Using modern compiler
> > > > >>     [javac] Compilation arguments:
> > > > >>     [javac] '-d'
> > > > >>     [javac] 'C:\tmp\ant-generics'
> > > > >>     [javac] '-classpath'
> > > > >>     [javac] ' LOT-OF-LIBS-FROM-ANT '
> > > > >>     [javac] '-sourcepath'
> > > > >>     [javac] 'C:\tmp\ant-generics'
> > > > >>     [javac] '-g:none'
> > > > >>     [javac]
> > > > >>     [javac] The ' characters around the executable and arguments are
> > > > >>     [javac] not part of the command.
> > > > >>     [javac] Files to be compiled:
> > > > >>     [javac]     C:\tmp\ant-generics\test\Base.java
> > > > >>     [javac]     C:\tmp\ant-generics\test\Sub.java
> > > > >>     [javac]     C:\tmp\ant-generics\test\Test1.java
> > > > >>     [javac]     C:\tmp\ant-generics\test\Test2.java
> > > > >>     [javac]     C:\tmp\ant-generics\test\Test3.java
> > > > >> BUILD SUCCESSFUL
> > > > >>
> > > > >>> ant -v
> > > > >> NOTHING-TO-COMPILE
> > > > >>
> > > > >>> touch test\Test3.java   (using Cygwin)
> > > > >>
> > > > >>> ant -v
> > > > >> Project base dir set to: C:\tmp\ant-generics
> > > > >>     [javac] build.xml skipped - don't know how to handle it
> > > > >>     [javac] test\Base.class skipped - don't know how to handle it
> > > > >>     [javac] test\Base.java omitted as test/Base.class is up to date.
> > > > >>     [javac] test\Sub.class skipped - don't know how to handle it
> > > > >>     [javac] test\Sub.java omitted as test/Sub.class is up to date.
> > > > >>     [javac] test\Test1$Inner1.class skipped - don't know how to
> > > > >> handle it
> > > > >>     [javac] test\Test1.class skipped - don't know how to handle it
> > > > >>     [javac] test\Test1.java omitted as test/Test1.class is up to
date.
> > > > >>     [javac] test\Test2$Inner2.class skipped - don't know how to
> > > > >> handle it
> > > > >>     [javac] test\Test2.class skipped - don't know how to handle it
> > > > >>     [javac] test\Test2.java omitted as test/Test2.class is up to
date.
> > > > >>     [javac] test\Test3$Inner3.class skipped - don't know how to
> > > > >> handle it
> > > > >>     [javac] test\Test3.class skipped - don't know how to handle it
> > > > >>     [javac] test\Test3.java added as test/Test3.class is outdated.
> > > > >>     [javac] Compiling 1 source file to C:\tmp\ant-generics
> > > > >>     [javac] Using modern compiler
> > > > >>     [javac] Compilation arguments:
> > > > >>     [javac] '-d'
> > > > >>     [javac] 'C:\tmp\ant-generics'
> > > > >>     [javac] '-classpath'
> > > > >>     [javac] ' LOT-OF-LIBS-FROM-ANT '
> > > > >>     [javac] '-sourcepath'
> > > > >>     [javac] 'C:\tmp\ant-generics'
> > > > >>     [javac] '-g:none'
> > > > >>     [javac]
> > > > >>     [javac] The ' characters around the executable and arguments are
> > > > >>     [javac] not part of the command.
> > > > >>     [javac] File to be compiled:
> > > > >>     [javac]     C:\tmp\ant-generics\test\Test3.java
> > > > >>
> > > > >> BUILD SUCCESSFUL
> > > > >>
> > > > >>
> > > > >>
> > > > >> build.xml:
> > > > >> <project>
> > > > >>     <javac srcdir="." destdir="."/>
> > > > >> </project>
> > > > >>
> > > > >>
> > > > >>
> > > > >> Jan
> > > > >>
> > > > >>
> > > > >>> -----Urspr?ngliche Nachricht-----
> > > > >>> Von: Peter Reilly [mailto:peter.kitt.reilly@(protected)] Gesendet:
> > > > >>> Dienstag, 17. Oktober 2006 16:44
> > > > >>> An: Ant Users List
> > > > >>> Betreff: Re: a problem compiling a Java 5 project with generics
> > > > >>>
> > > > >>> On 10/17/06, Jan.Materne@(protected) <Jan.Materne@(protected)>
> > > > >>> wrote:
> > > > >>>> Works for me with Ant 1.6.5 and 1.7beta2 and the given java
> > > > >>> sources (with and without the commented line).
> > > > >>>> <project>
> > > > >>>>     <delete dir="." includes="**/*.class"/>
> > > > >>>>     <javac srcdir="." destdir="."/>
> > > > >>>> </project>
> > > > >>> This works by itself, but touch Test3.java and run again.
> > > > >>> Peter
> > > > >>>>
> > > > >>>>
> > > > >>>> Jan
> > > > >>>>
> > > > >>>>> -----Urspr?ngliche Nachricht-----
> > > > >>>>> Von: Peter Reilly [mailto:peter.kitt.reilly@(protected)]
> > > > >>>>> Gesendet: Dienstag, 17. Oktober 2006 11:39
> > > > >>>>> An: Ant Users List
> > > > >>>>> Betreff: Re: a problem compiling a Java 5 project with generics
> > > > >>>>>
> > > > >>>>> Can you enter a bugzilla report about this.
> > > > >>>>> It is very strange.
> > > > >>>>>
> > > > >>>>> I tried on the commandline:
> > > > >>>>>
> > > > >>>>> javac -target 1.5 -g -source  1.5 -sourcepath src -d build\classes
> > > > >>>>> src\org\test\Test3.java
> > > > >>>>>
> > > > >>>>> which works fine - and looks very like the command used by ant.
> > > > >>>>>
> > > > >>>>> Peter
> > > > >>>>>
> > > > >>>>>
> > > > >>>>> On 10/17/06, Chavdar Botev <cbotev@(protected)> wrote:
> > > > >>>>>> Hi
> > > > >>>>>>
> > > > >>>>>> For some reason, the mailing server included only the first
> > > > >>>>>> attachment. Since this is the fourth or the fifth time I am
> > > > >>>>> trying to
> > > > >>>>>> send the java files, I give up. I'll inline them in the message.
> > > > >>>>>>
> > > > >>>>>> // src/test/Base.java
> > > > >>>>>> package test;
> > > > >>>>>> public class Base {}
> > > > >>>>>>
> > > > >>>>>>
> > > > >>>>>> // src/test/Sub.java
> > > > >>>>>> package test;
> > > > >>>>>> public class Sub extends Base {}
> > > > >>>>>>
> > > > >>>>>> // src/test/Test1.java
> > > > >>>>>> package test;
> > > > >>>>>> public class Test1<T extends Base> {
> > > > >>>>>>         public class Inner1 {
> > > > >>>>>>                 protected T v;
> > > > >>>>>>                 public Inner1(T v) {this.v = v;}
> > > > >>>>>>                 public T getV() {return this.v;}
> > > > >>>>>>         }
> > > > >>>>>>         public Inner1 getInner(T v) {return new Inner1(v);} }
> > > > >>>>>>
> > > > >>>>>> // src/test/Test2.java
> > > > >>>>>> package test;
> > > > >>>>>> public class Test2<T extends Base> extends Test1<T> {
> > > > >>>>>>         public class Inner2 extends Inner1 {
> > > > >>>>>>                 public Inner2(T v) {super(v);}
> > > > >>>>>>                 //public T getV() {return this.v;}
> > > > >>>>>>         }
> > > > >>>>>> }
> > > > >>>>>>
> > > > >>>>>> // src/test/Test3.java
> > > > >>>>>> package test;
> > > > >>>>>> public class Test3 extends Test2<Sub> {
> > > > >>>>>>         public class Inner3 extends Inner2 {
> > > > >>>>>>                 public Inner3(Sub v) {super(v);}
> > > > >>>>>>                 public Sub p() {return this.getV();}
> > > > >>>>>>         }
> > > > >>>>>>
> > > > >>>>>>         public Inner3 g() {
> > > > >>>>>>                 return new Inner3(new Sub());
> > > > >>>>>>         }
> > > > >>>>>> }
> > > > >>>>>>
> > > > >>>>>>
> > > > >>>>>> HTH,
> > > > >>>>>> Chavdar
> > > > >>>>>>
> > > > >>>>>>
> > > > >>>>>> On 10/16/06, Petar Tahchiev <paranoiabla@(protected)> wrote:
> > > > >>>>>>> On 17/10/06, Chavdar Botev <cbotev@(protected)> wrote:
> > > > >>>>>>>> Hi!
> > > > >>>>>>>>
> > > > >>>>>>>> I've come accross the following problem trying to
> > > > >>> compile Java
> > > > >>>>>>>> 5 classes with generics using Ant 1.6.5. I've attached
> > > > >>>>> project with
> > > > >>>>>>>> sample Java classes and a build.xml file.
> > > > >>>>>>>>
> > > > >>>>>>>> NOTE: Please create a src/test subdirectory and save the
> > > > >>>>> attached
> > > > >>>>>>>> .java files into it. The mailing list server gave me a hard
> > > > >>>>>>>> time acepting an email with the archived project files. :(
> > > > >>>>>>>>
> > > > >>>>>>>> A clean build of the above project works just fine
> > > > >>> and compiles
> > > > >>>>>>>> without a problem. If after that, I touch the Test3.java
> > > > >>>>> file the
> > > > >>>>>>>> build fails with the following error:
> > > > >>>>>>>>
> > > > >>>>>>> [javac] C:\src\appforge\test\src\test\Test3.java:5:
> > > > >>> incompatible
> > > > >>>>>>> types
> > > > >>>>>>>> [javac] found   : test.Base
> > > > >>>>>>>> [javac] required: test.Sub
> > > > >>>>>>>> [javac] public Sub p() {return this.getV();} [javac]
> > > > >>> ^ [javac]
> > > > >>>>>>>> 1 error
> > > > >>>>>>>
> > > > >>>>>>> I must admit that this behaviour is really strange. I am
> > > > >>>>> interested
> > > > >>>>>>> in helping you but the problem is that I didn't receive
> > > > >>> any .java
> > > > >>>>>>> files. Please try to prvide them again.
> > > > >>>>>>>
> > > > >>>>>>>
> > > > >>>>>>> Initially, I thought that this was a problem with the Java
> > > > >>>>> compiler.
> > > > >>>>>>>> After touching Test3.java, I tried running javac manually:
> > > > >>>>>>>>
> > > > >>>>>>>> javac -sourcepath src -d bin -g -source 1.5 -target 1.5
> > > > >>>>>>>> src\test\*.java
> > > > >>>>>>>>
> > > > >>>>>>>> It turned out that with the above command-line the project
> > > > >>>>>>>> compiled OK. The project also compiles without a problem
> > > > >>>>> in Eclipse 3.2.1.
> > > > >>>>>>>> Am I missing anything? It is my understanding that the
> > > > >>>>> build file
> > > > >>>>>>>> and the command line should produce the same results.
> > > > >>>>>>>>
> > > > >>>>>>>> Upon further experimentation, if I uncomment the method in
> > > > >>>>>>>> Test2.java fixes the problem. Touching Test3.java does
> > > > >>>>> not break the build.
> > > > >>>>>>>> Thanks,
> > > > >>>>>>>> Chavdar
> > > > >>>>>>>>
> > > > >>>>>>>>
> > > > >>>>>>>>
> > > > >>>>> ------------------------------------------------------------------
> > > > >>>>>>>> --- To unsubscribe, e-mail:
> > > > >>> user-unsubscribe@(protected) For
> > > > >>>>>>>> additional commands, e-mail: user-help@(protected)
> > > > >>>>>>>>
> > > > >>>>>>>>
> > > > >>>>>>>>
> > > > >>>>>>>
> > > > >>>>>>> --
> > > > >>>>>>> Regards, Petar!
> > > > >>>>>>> Karlovo, Bulgaria.
> > > > >>>>>>>
> > > > >>>>>>>
> > > > >>>>>>
> > > > >>> -------------------------------------------------------------------
> > > > >>>>>> -- To unsubscribe, e-mail: user-unsubscribe@(protected) For
> > > > >>>>> additional
> > > > >>>>>> commands, e-mail: user-help@(protected)
> > > > >>>>>>
> > > > >>>>>>
> > > > >>>> ------------------------------------------------------------------
---
> > > > >>>>> To unsubscribe, e-mail: user-unsubscribe@(protected) For
> > > > >>>>> additional commands, e-mail: user-help@(protected)
> > > > >>>>>
> > > > >>>>>
> > > > >>>> ------------------------------------------------------------------
---
> > > > >>>> To unsubscribe, e-mail: user-unsubscribe@(protected) For
> > > > >>> additional
> > > > >>>> commands, e-mail: user-help@(protected)
> > > > >>>>
> > > > >>>>
> > > > >>> -------------------------------------------------------------------
--
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> > > > >>> additional commands, e-mail: user-help@(protected)
> > > > >>>
> > > > >>>
> > > > >>
> > > > >> ---------------------------------------------------------------------
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> > > > >>
> > > > >
> > > > >
> > > > > ---------------------------------------------------------------------
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> > > > > For additional commands, e-mail: user-help@(protected)
> > > > >
> > > > >
> > > >
> > > > --
> > > > Scot P. Floess
> > > > 27 Lake Royale
> > > > Louisburg, NC  27549
> > > >
> > > > 252-478-8087 (Home)
> > > > 919-754-4592 (Work)
> > > >
> > > > Chief Architect JPlate  http://sourceforge.net/projects/jplate
> > > > Chief Architect JavaPIM http://sourceforge.net/projects/javapim
> > > >
> > > >
> > > > ---------------------------------------------------------------------
> > > > To unsubscribe, e-mail: user-unsubscribe@(protected)
> > > > For additional commands, e-mail: user-help@(protected)
> > > >
> > > >
> > >
> > > ---------------------------------------------------------------------
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> > > For additional commands, e-mail: user-help@(protected)
> > >
> > >
> >
>
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