Java 拆分字符串时的ConcurrentModificationException

在运行下面的代码（这是实际循环的一个片段）时，我遇到了一个

ConcurrentModificationException

我尝试按照这个问题的答案进行操作，但发现当我尝试拆分

nextLine

时，实际问题发生了

有没有合适的方法在循环中进行拆分而不导致异常

 ArrayList<Task> temp = new ArrayList<>();
 ListIterator<String> iterator = taskFileFromJob.listIterator();
 int count = 0;
 while (iterator.hasNext()) {

    String nextLine = iterator.next();
    if (nextLine != null && nextLine.split(Pattern.quote("|")) != null) {

        String[] lineSplit = nextLine.split(Pattern.quote("|"));

        temp.add(new Task(lineSplit[0]));

        if (lineSplit.length > 1) {
           temp.get(count).setDependenciesList(new ArrayList<>(Arrays.asList(lineSplit[1].split(","))));

           if (lineSplit.length > 2) {
              temp.get(count).setDocumentList(new ArrayList<>(Arrays.asList(lineSplit[2].split(","))));
           }
        }
        count++;
    }

 }

编辑2：

似乎使用线程来迭代这是另一个可能的问题。我尝试在包含此块的方法中使用

syncronized

，但最终还是遇到了相同的问题

然后，我删除了附加线程的使用，并以相同的异常结束，但具有不同的堆栈跟踪：

java.util.ConcurrentModificationException
    at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:859)
    at java.util.ArrayList$Itr.next(ArrayList.java:831)
    at app.content.ContentController.parseTaskFromJobFile(ContentController.java:122)
    at app.content.ContentController.runLogic(ContentController.java:74)
    at specter2.AppController.loadApp(AppController.java:92)
    at specter2.AppManager.launchApp(AppManager.java:103)
    at specter2.AppManager$AppButtonSelectedListener.actionPerformed(AppManager.java:243)
    at aurora.engine.V1.UI.ARadioButton.setSelected(ARadioButton.java:89)
    at aurora.engine.V1.UI.ARadioButton$Click.mousePressed(ARadioButton.java:137)
    at java.awt.Component.processMouseEvent(Component.java:6502)
    at javax.swing.JComponent.processMouseEvent(JComponent.java:3320)
    at java.awt.Component.processEvent(Component.java:6270)
    at java.awt.Container.processEvent(Container.java:2229)
    at java.awt.Component.dispatchEventImpl(Component.java:4861)
    at java.awt.Container.dispatchEventImpl(Container.java:2287)
    at java.awt.Component.dispatchEvent(Component.java:4687)
    at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4832)
    at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4489)
    at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4422)
    at java.awt.Container.dispatchEventImpl(Container.java:2273)
    at java.awt.Window.dispatchEventImpl(Window.java:2719)
    at java.awt.Component.dispatchEvent(Component.java:4687)
    at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:735)
    at java.awt.EventQueue.access$200(EventQueue.java:103)
    at java.awt.EventQueue$3.run(EventQueue.java:694)
    at java.awt.EventQueue$3.run(EventQueue.java:692)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
    at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:87)
    at java.awt.EventQueue$4.run(EventQueue.java:708)
    at java.awt.EventQueue$4.run(EventQueue.java:706)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
    at java.awt.EventQueue.dispatchEvent(EventQueue.java:705)
    at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242)
    at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161)
    at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138)
    at java.awt.EventDispatchThread.run(EventDispatchThread.java:91)

---

发布堆栈跟踪，因为我怀疑这就是错误的来源。调用

split

而不将结果分配给任何对象是对完美源代码行的巨大浪费。您希望此语句做什么？请注意，

split

完全不涉及堆栈跟踪。从跟踪中，它在线程

aurora.engine.V1.Logic.AThreadWorker

中执行。可能有两个线程试图迭代它。尝试使用同步块。我想您有另一个线程正在修改

taskFileFromJob

。javadoc for表示，如果另一个线程正在对集合进行迭代，则该线程通常无法修改该集合。如果删除

split

使此代码正常工作，这意味着这可能是一个时间问题——即删除

split

使迭代完成得更快，因此另一个线程中的修改发生得太晚而不会导致异常。

java.util.ConcurrentModificationException
    at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:859)
    at java.util.ArrayList$Itr.next(ArrayList.java:831)
    at app.content.ContentController.parseTaskFromJobFile(ContentController.java:122)
    at app.content.ContentController.runLogic(ContentController.java:74)
    at specter2.AppController.loadApp(AppController.java:92)
    at specter2.AppManager.launchApp(AppManager.java:103)
    at specter2.AppManager$AppButtonSelectedListener.actionPerformed(AppManager.java:243)
    at aurora.engine.V1.UI.ARadioButton.setSelected(ARadioButton.java:89)
    at aurora.engine.V1.UI.ARadioButton$Click.mousePressed(ARadioButton.java:137)
    at java.awt.Component.processMouseEvent(Component.java:6502)
    at javax.swing.JComponent.processMouseEvent(JComponent.java:3320)
    at java.awt.Component.processEvent(Component.java:6270)
    at java.awt.Container.processEvent(Container.java:2229)
    at java.awt.Component.dispatchEventImpl(Component.java:4861)
    at java.awt.Container.dispatchEventImpl(Container.java:2287)
    at java.awt.Component.dispatchEvent(Component.java:4687)
    at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4832)
    at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4489)
    at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4422)
    at java.awt.Container.dispatchEventImpl(Container.java:2273)
    at java.awt.Window.dispatchEventImpl(Window.java:2719)
    at java.awt.Component.dispatchEvent(Component.java:4687)
    at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:735)
    at java.awt.EventQueue.access$200(EventQueue.java:103)
    at java.awt.EventQueue$3.run(EventQueue.java:694)
    at java.awt.EventQueue$3.run(EventQueue.java:692)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
    at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:87)
    at java.awt.EventQueue$4.run(EventQueue.java:708)
    at java.awt.EventQueue$4.run(EventQueue.java:706)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
    at java.awt.EventQueue.dispatchEvent(EventQueue.java:705)
    at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242)
    at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161)
    at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138)
    at java.awt.EventDispatchThread.run(EventDispatchThread.java:91)