Добрый вечер. Написал небольшую программку в которой есть всего 3 класса.
Main запускающий JavaFX окно через fxml файл.
ActionsMain Обрабатывающий события всех контролов на форме.
Archivations принимает директорию которую нужно заархивировать и отпровляет ее в ахив через ZipOutputStream с рекурсивным обходом директории walkFileTree.
В том же класса Archivations происходит процесс расчета прогрэса выполнения. И долже сообщять вызвавшемы классу ActionsMain о том что у него поменялся прогрэс. А ActionsMain в свою очередь должен менять значение на прогрэсс баре. Все бы хорошо да только возникает Exeptions
А вот и виновник торжества:
/usr/lib/jvm/jdk1.8.0_77/bin/java -Didea.launcher.port=7535 -Didea.launcher.bin.path=/home/grabedinex/Загрузки/IDEA/idea/idea-IU-145.597.3/bin -Dfile.encoding=UTF-8 -classpath /usr/lib/jvm/jdk1.8.0_77/jre/lib/charsets.jar:/usr/lib/jvm/jdk1.8.0_77/jre/lib/deploy.jar:/usr/lib/jvm/jdk1.8.0_77/jre/lib/ext/cldrdata.jar:/usr/lib/jvm/jdk1.8.0_77/jre/lib/ext/dnsns.jar:/usr/lib/jvm/jdk1.8.0_77/jre/lib/ext/jaccess.jar:/usr/lib/jvm/jdk1.8.0_77/jre/lib/ext/jfxrt.jar:/usr/lib/jvm/jdk1.8.0_77/jre/lib/ext/localedata.jar:/usr/lib/jvm/jdk1.8.0_77/jre/lib/ext/nashorn.jar:/usr/lib/jvm/jdk1.8.0_77/jre/lib/ext/sunec.jar:/usr/lib/jvm/jdk1.8.0_77/jre/lib/ext/sunjce_provider.jar:/usr/lib/jvm/jdk1.8.0_77/jre/lib/ext/sunpkcs11.jar:/usr/lib/jvm/jdk1.8.0_77/jre/lib/ext/zipfs.jar:/usr/lib/jvm/jdk1.8.0_77/jre/lib/javaws.jar:/usr/lib/jvm/jdk1.8.0_77/jre/lib/jce.jar:/usr/lib/jvm/jdk1.8.0_77/jre/lib/jfr.jar:/usr/lib/jvm/jdk1.8.0_77/jre/lib/jfxswt.jar:/usr/lib/jvm/jdk1.8.0_77/jre/lib/jsse.jar:/usr/lib/jvm/jdk1.8.0_77/jre/lib/management-agent.jar:/usr/lib/jvm/jdk1.8.0_77/jre/lib/plugin.jar:/usr/lib/jvm/jdk1.8.0_77/jre/lib/resources.jar:/usr/lib/jvm/jdk1.8.0_77/jre/lib/rt.jar:/home/grabedinex/Project/Lineage/Laucnehr/Launcher_archivator/out/production/Launcher_archivator:/home/grabedinex/Загрузки/IDEA/idea/idea-IU-145.597.3/lib/idea_rt.jar com.intellij.rt.execution.application.AppMain com.grabedinex.launcher.main.Main
0.5
Exception in thread "JavaFX Application Thread" java.lang.RuntimeException: java.lang.reflect.InvocationTargetException
at javafx.fxml.FXMLLoader$MethodHandler.invoke(FXMLLoader.java:1774)
at javafx.fxml.FXMLLoader$ControllerMethodEventHandler.handle(FXMLLoader.java:1657)
at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:86)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:238)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:191)
at com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(CompositeEventDispatcher.java:59)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:58)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:74)
at com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:49)
at javafx.event.Event.fireEvent(Event.java:198)
at javafx.scene.Node.fireEvent(Node.java:8411)
at javafx.scene.control.Button.fire(Button.java:185)
at com.sun.javafx.scene.control.behavior.ButtonBehavior.mouseReleased(ButtonBehavior.java:182)
at com.sun.javafx.scene.control.skin.BehaviorSkinBase$1.handle(BehaviorSkinBase.java:96)
at com.sun.javafx.scene.control.skin.BehaviorSkinBase$1.handle(BehaviorSkinBase.java:89)
at com.sun.javafx.event.CompositeEventHandler$NormalEventHandlerRecord.handleBubblingEvent(CompositeEventHandler.java:218)
at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:80)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:238)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:191)
at com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(CompositeEventDispatcher.java:59)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:58)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:74)
at com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:54)
at javafx.event.Event.fireEvent(Event.java:198)
at javafx.scene.Scene$MouseHandler.process(Scene.java:3757)
at javafx.scene.Scene$MouseHandler.access$1500(Scene.java:3485)
at javafx.scene.Scene.impl_processMouseEvent(Scene.java:1762)
at javafx.scene.Scene$ScenePeerListener.mouseEvent(Scene.java:2494)
at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:352)
at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:275)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.javafx.tk.quantum.GlassViewEventHandler.lambda$handleMouseEvent$354(GlassViewEventHandler.java:388)
at com.sun.javafx.tk.quantum.QuantumToolkit.runWithoutRenderLock(QuantumToolkit.java:389)
at com.sun.javafx.tk.quantum.GlassViewEventHandler.handleMouseEvent(GlassViewEventHandler.java:387)
at com.sun.glass.ui.View.handleMouseEvent(View.java:555)
at com.sun.glass.ui.View.notifyMouse(View.java:937)
at com.sun.glass.ui.gtk.GtkApplication._runLoop(Native Method)
at com.sun.glass.ui.gtk.GtkApplication.lambda$null$49(GtkApplication.java:139)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at sun.reflect.misc.Trampoline.invoke(MethodUtil.java:71)
at sun.reflect.GeneratedMethodAccessor1.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at sun.reflect.misc.MethodUtil.invoke(MethodUtil.java:275)
at javafx.fxml.FXMLLoader$MethodHandler.invoke(FXMLLoader.java:1769)
... 48 more
Caused by: java.lang.NullPointerException
at com.grabedinex.launcher.main.ActionsMain.Upp(ActionsMain.java:92)
at com.grabedinex.launcher.main.ActionsMain.UpdateProgress(ActionsMain.java:88)
at com.grabedinex.launcher.archivations.Arcivations.Progressbar_change(Arcivations.java:50)
at com.grabedinex.launcher.archivations.Arcivations$1.visitFile(Arcivations.java:94)
at com.grabedinex.launcher.archivations.Arcivations$1.visitFile(Arcivations.java:80)
at java.nio.file.Files.walkFileTree(Files.java:2670)
at java.nio.file.Files.walkFileTree(Files.java:2742)
at com.grabedinex.launcher.archivations.Arcivations.AddDirectoryRecursive(Arcivations.java:80)
at com.grabedinex.launcher.archivations.Arcivations.archivate(Arcivations.java:74)
at com.grabedinex.launcher.main.ActionsMain.PackDirectory(ActionsMain.java:71)
at com.grabedinex.launcher.main.ActionsMain.btnStartPatch_action(ActionsMain.java:57)
... 58 more
Process finished with exit code 0
Что бы не засорять тему, да и не влезет весь код укажу ссылки на pastebin всех классов.
Main:
pastebin.com/2gfDiC3G
FXML к нему:
pastebin.com/ggsMQcmc
ActionsMain(Обработка событий формы):
pastebin.com/nAeW5ffN
Archivations(Мой класс для архивации):
pastebin.com/buymrD2c 
Простой
Средний