Bug 250700

Could you please build your project with '-verbose' and attach the extended output to the issue? Thanks.

Thanks for response,
Could you please guide me about how to build the project using '-verbose'? I just click on Clean and Build the project using NetBeans.
Thanks.

One of the possibilities is to click on the 'Re-run with Defferent Peremeters' button that can be found in the upper-left corner of your build Output Window and change Verbosity level to "Verbose". Another possibility is to change the "Tools->Options->Java->Ant->Verbosity Level" setting.

Created attachment 152262 [details]
this is the occurred error.

I compiled the project using verbose. Now it displays the attached ugly error.
Please help me. 
Thanks

Comment on attachment 152262 [details]
this is the occurred error.

The attached error only appears when i want to clean and build the project. It runs perfectly.

To prevent OutOfMemoryErrors, try to increase the default heap size given to ant compilation (e.g. export ANT_OPTS=-Xmx1024m). Anyway, could you please attach the whole verbose output to this issue? To resolve the original error, we need to see the actual arguments passed to javac comoiler when building your project. Thanks.

Created attachment 152268 [details]
Verbos cleans and build error

first of all thanks a lot for giving me your time GOD bless you.
the attached file is the whole error (verbose output) which is occur during Clean and Build the project.
Regards,

*** Bug 250770 has been marked as a duplicate of this bug. ***

Please can you try to put the following property into nbproject/project.properties file:

javac.fork=true

This property will force the Ant to fork javac compilation to separate VM. It's slower however it does not take the Ant memory.
If it does not help you will need to add:

memorymaximumsize="256m" 

attribute into javac task.

Dear Sir, I have added the javac.fork=true in nbproject/project.properties
but it is still giving me that error. Could you please tell me that where and how i can add memorymaximumsize="256m" attribute into javac task as you said?
Regards,

Try to add the -J-Xmx1G into Project Properties/Build/Compiling/Additional Compiler Options.
The value is stored into javac.compilerargs property in project.properties, so the same can be achieved by putting

javac.compilerargs=-J-Xmx1G

into project.properties.

If it does not work please attach me Ant debug log of such a run.
Thanks

Dear Sir,
With the help of this -J-Xmx1G you save my life, my 5 months and my money. I have successfully Clean and Build the project. But it gives me this error 
Note: Some input files use unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
Is this dangerous? Please guide me. I will remember you in my prayers. GOD bless you.
Thanks

The -Xlint:unchecked is a compiler warning that the code uses patterns which are not save regarding generic types and compiler cannot verify correctness.
It's mostly cast to generic type, raw types like List l = new ArrayList() (no type parameters) and assignments among generic type and raw types.

If you add -Xlint:unchecked into Project Properties/Build/Compiling/Additional Compiler Options the compiler will print warning on lines where there are problems with generics.

Thank a lot.

Fixed jet-main 5587c3d88969

It's impossible to prevent OutOfMemoryError when compiler runs in the same VM.
However I at least make it simpler to switch the compiler to external VM.
I've added a check box "Run Compilation in External VM" into Project Properties/Build/Compilation.
I also set the compilation in external VM as default for newly created j2se ant projects.

Integrated into 'main-silver', will be available in build *201503060001* on http://bits.netbeans.org/dev/nightly/ (upload may still be in progress)

Changeset: http://hg.netbeans.org/main-silver/rev/5587c3d88969
User: Tomas Zezula <tzezula@netbeans.org>
Log: #250700:An exception has occurred in the compiler (1.8.0_20).