java - ArrayIndexOutOfBoundsException : -1 on JTable creation/tablechanged

Question

我已经阅读了所有看起来似乎可以解决我的问题的线程，并且我也阅读了这里的所有答案，但我仍然束手无策。我不确定为什么抛出异常，尽管我有一种感觉这可能与 threading 有关。 。如果是这样，请告诉我在哪里包含 new Runnable()以及是否 invokeLater()或invokeAndWait() ，因为我已经尝试过了，没有效果。

请耐心等待，我将向您提供导致异常的代码+堆栈跟踪(如下)。

编辑:我包含了一些 syso位于 AnnoTable tableChanged 之前的部分被调用并且它们不会出现在控制台中，因此我认为问题甚至必须在应用程序到达该点之前发生，即从 AAView 调用它时或者当数据和表模型被实例化时......

编辑 II:问题是被覆盖的 tableChanged方法。这显然会引发异常。我已经删除了tableChanged()也可以调用(这不会有什么区别)。现在我遇到了另一个问题:了解基础数据 ( AnnoData ) 的更改如何自动更新表。虽然这可能是为了另一个查询(在扩展的 Google 搜索之后)，但请随时在此线程中发布有用的评论，因为我将继续阅读它...非常感谢所有有用的评论和提示!

编辑 III:* 我已经解决了问题。我需要实例化 AnnoData 中的另一个对象，将其传递给 AnnoTableModel 的新实例，将此实例设置为我的表，然后 fireTableDataChanged() .

编辑 IV: 好的，所以 fireTableDataChanged() (如编辑 III 中使用的)毕竟是不必要的。我仍然想使用它而不是一直创建新对象。我想我应该问一个新问题...谢谢!

AAView中的此方法应该创建一个扩展 JTable 的对象，将其放入 JScrollPane等等(后者确实有效)。

private JPanel createAnnoTablePanel() {
    annoTablePanel = new JPanel();
    annoTable = new AnnoTable(aameth);
    setAnnoTable(annoTable);
    JScrollPane scrollPane = new JScrollPane(getAnnoTable());
    annoTablePanel.add(scrollPane);
    return annoTablePanel;
}

这是类(class) AnnoTable ( aameth 是一个实例对象，包含访问数据模型的业务逻辑，工作正常)。

public class AnnoTable extends JTable implements TableModelListener
{

  public AnnoTable(AAMethods aameth)
  {

     int tokenCount = aameth.getTokenCount();

     AnnoData annoData = new AnnoData(aameth); // cf. below, AnnoData is a Vector(Vector<Object>,String[])

     TableModel tableModel = new AnnoTableModel(annoData.getAnnoData(),
     // AnnoTableModel extends AbstractTableModel(Vector, String[])
     annoData.getColTitles());
     setModel(tableModel);
     getModel().addTableModelListener(this);
     TableModelEvent tme = new TableModelEvent(tableModel);
     this.tableChanged(tme);
     setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
     setCellSelectionEnabled(true);
     getColumnModel().getSelectionModel().addListSelectionListener(new AnnoTableSelectionListener(this));
     setPreferredScrollableViewportSize(this.getPreferredSize());

  }

  public void tableChanged(TableModelEvent e) {
  int row = e.getFirstRow();
     int column = e.getColumn();
     AbstractTableModel model = (AbstractTableModel)e.getSource();
     String columnName = model.getColumnName(column);
     Object data = model.getValueAt(row, column); // This is where the exception is thrown!
  }
}

如果您需要 AnnoTableModel() 的源代码(这是 AbstractTableModel 的相当通用的扩展)或 AnnoData (它构造一个 Vector ，其中包含三个 Vector<Object> 和一个 String[] 作为列标题)，请告诉我。

这是堆栈跟踪。

Exception in thread "AWT-EventQueue-0" java.lang.ArrayIndexOutOfBoundsException: -1
at java.util.Vector.elementAt(Unknown Source)
at javax.swing.table.DefaultTableModel.getValueAt(Unknown Source)
at package.AnnoTable.tableChanged(AnnoTable.java:52)
at javax.swing.JTable.setModel(Unknown Source)
at javax.swing.JTable.<init>(Unknown Source)
at javax.swing.JTable.<init>(Unknown Source)
at package.AnnoTable.<init>(AnnoTable.java:25)
at package.AAView.createAnnoTablePanel(AAView.java:464)
at package.AAView.createNorthPanel(AAView.java:455)
at package.AAView.displayAndAnnotate(AAView.java:444)
at package.AAView.loadProject(AAView.java:333)
at package.AAView.actionPerformed(AAView.java:286)
at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
at javax.swing.AbstractButton.doClick(Unknown Source)
at javax.swing.AbstractButton.doClick(Unknown Source)
at javax.swing.plaf.basic.BasicMenuItemUI$Actions.actionPerformed(Unknown Source)
at javax.swing.SwingUtilities.notifyAction(Unknown Source)
at javax.swing.JComponent.processKeyBinding(Unknown Source)
at javax.swing.JMenuBar.processBindingForKeyStrokeRecursive(Unknown Source)
at javax.swing.JMenuBar.processBindingForKeyStrokeRecursive(Unknown Source)
at javax.swing.JMenuBar.processBindingForKeyStrokeRecursive(Unknown Source)
at javax.swing.JMenuBar.processKeyBinding(Unknown Source)
at javax.swing.KeyboardManager.fireBinding(Unknown Source)
at javax.swing.KeyboardManager.fireKeyboardAction(Unknown Source)
at javax.swing.JComponent.processKeyBindingsForAllComponents(Unknown Source)
at javax.swing.JComponent.processKeyBindings(Unknown Source)
at javax.swing.JComponent.processKeyEvent(Unknown Source)
at java.awt.Component.processEvent(Unknown Source)
at java.awt.Container.processEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.KeyboardFocusManager.redispatchEvent(Unknown Source)
at java.awt.DefaultKeyboardFocusManager.dispatchKeyEvent(Unknown Source)
at java.awt.DefaultKeyboardFocusManager.preDispatchKeyEvent(Unknown Source)
at java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(Unknown Source)
at java.awt.DefaultKeyboardFocusManager.dispatchEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Window.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
at java.awt.EventQueue.access$000(Unknown Source)
at java.awt.EventQueue$1.run(Unknown Source)
at java.awt.EventQueue$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source)
at java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue$2.run(Unknown Source)
at java.awt.EventQueue$2.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)

我可以看到EDT在那里，据我所知，这可能确实是线程问题。但是，我不知道如何找出应该在哪里开始新的 Thread (或调用 new Runnable() 。

顺便说一句，当我更改 AnnoTable 时，异常才开始出现延长JTable而不是JPanel 。本来我有AnnoTable不仅构建表格，还将其包装在滚动 Pane 中并将其添加到新的 JPanel 中。 。但因为我想fireTableDataChanged来自只知道 AAView 的类(class)(它还具有 setAnnoTable() 方法)我想以正确的方式进行操作，而之前它工作得很好。墨菲定律？

Answer 1

rowIndex 为 -1 (==TableModelEvent.HEADER_ROW) 表示模型的结构已完全更改。此类事件由 setModel 上的 JTable 在内部触发。阅读 TableModelEvent 的 api 文档，以充分了解监听器的 tableChanged 中期望哪些类型/值。

顺便说一句，@AKJ 是对的 - 无需在表代码中触发任何 TableModelEvents。让模型适本地触发事件