android - Unity -Facebook SDK - Error building Player: Win32Exception -

after installing facebook sdk project error trying build game (android device):

error building player: win32exception: applicationname='javac.exe', commandline='-bootclasspath "d:/documents/androidsdk/platforms/android-22\android.jar" -d "d:\documents\multec\3d real time\pinball2\temp\stagingarea\bin\classes" -source 1.6 -target 1.6 -encoding utf-8 "com\facebook\android\r.java" "com\starwardo\pinball\r.java"', currentdirectory='d:\documents\multec\3d real time\pinball2\temp\stagingarea\gen'

i installed java jdk 32 , fixed error.