在与 EDT 不同的线程中从 JList 中删除项目

Question

我试图在遍历 for 循环时从 JList 中删除一个元素。为了找出我要删除的元素，我比较了我定义的工具提示，然后只删除了那个元素。

public static void removeElement(JList list, String idx){
    DefaultListModel model = (DefaultListModel)list.getModel();
    JLabel actual;
    for(int i = 0; i < model.getSize(); i++){
        actual = (JLabel) model.get(i);
         if(actual.getToolTipText().equals(idx)){
             model.remove(i);
             break;
         }
    }
}

这个函数在主class中声明，并访问swing元素，也声明为静态的。然后该函数被另一个线程调用：

public class threadExample extends Thread{
    //...
    @Override
    public void run() {
        Main.removeElement(OIS.listElement, graphicalID);
    }
    
}

执行时会出现这个异常，但只是偶尔出现。

Exception in thread "AWT-EventQueue-0" java.lang.ArrayIndexOutOfBoundsException: 1 >= 1
    t java.base/java.util.Vector.elementAt(Vector.java:497)
    at java.desktop/javax.swing.DefaultListModel.getElementAt(DefaultListModel.java:90)
    at java.desktop/javax.swing.plaf.basic.BasicListUI.paintCell(BasicListUI.java:265)
    at java.desktop/javax.swing.plaf.basic.BasicListUI.paintImpl(BasicListUI.java:378)
    at java.desktop/javax.swing.plaf.basic.BasicListUI.paint(BasicListUI.java:301)
    at java.desktop/javax.swing.plaf.synth.SynthListUI.update(SynthListUI.java:78)
    at java.desktop/javax.swing.JComponent.paintComponent(JComponent.java:797)
    at java.desktop/javax.swing.JComponent.paint(JComponent.java:1074)
    at java.desktop/javax.swing.JComponent.paintToOffscreen(JComponent.java:5255)
    at java.desktop/javax.swing.BufferStrategyPaintManager.paint(BufferStrategyPaintManager.java:246)
    at java.desktop/javax.swing.RepaintManager.paint(RepaintManager.java:1323)
    at java.desktop/javax.swing.JComponent._paintImmediately(JComponent.java:5203)
    at java.desktop/javax.swing.JComponent.paintImmediately(JComponent.java:5013)
    at java.desktop/javax.swing.RepaintManager.run(RepaintManager.java:865)
    at java.desktop/javax.swing.RepaintManager.run(RepaintManager.java:848)
    at java.base/java.security.AccessController.doPrivileged(Native Method)
    at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:85)
    at java.desktop/javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:848)
    at java.desktop/javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:823)
    at java.desktop/javax.swing.RepaintManager.prePaintDirtyRegions(RepaintManager.java:772)
    at java.desktop/javax.swing.RepaintManager$ProcessingRunnable.run(RepaintManager.java:1890)
    at java.desktop/java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:313)
    at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:770)
    at java.desktop/java.awt.EventQueue.run(EventQueue.java:721)
    at java.desktop/java.awt.EventQueue.run(EventQueue.java:715)
    at java.base/java.security.AccessController.doPrivileged(Native Method)
    at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:85)
    at java.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:740)
    at java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:203)
    at java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:124)
    at java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:113)
    at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:109)
    at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
    at java.desktop/java.awt.EventDispatchThread.run(EventDispatchThread.java:90)

据我所知，我无法像现在这样在 for 循环中进行删除，但我找不到任何替代方法。谁能帮帮我？

编辑

问题不在于删除过程，而是因为我在与 EDT 不同的线程中执行操作。

Answer 1

由于您似乎是在与 EDT 不同的线程中调用 removeElement，因此您应该使用：

SwingUtilities.invokeLater(() -> { removeElement(....); }

用于异步执行，或

SwingUtilities.invokeAndWait(() -> { removeElement(....); }

如果您想等待方法完成后再继续。

在与 EDT 不同的线程中从 JList 中删除项目

Delete item from JList in a different thread than EDT

java

swing

jlist

defaultlistmodel