为什么我在线程“AWT-EventQueue-0”中得到异常java.lang.ArrayIndexOutOfBoundsException：2？

Question

我每次我试图在我的JTable更新数据时收到此错误：

Exception in thread "AWT-EventQueue-0" java.lang.ArrayIndexOutOfBoundsException: 2 
at javax.swing.DefaultRowSorter.convertRowIndexToModel(DefaultRowSorter.java:501) 
at javax.swing.JTable.convertRowIndexToModel(JTable.java:2620) 
at javax.swing.JTable.getValueAt(JTable.java:2695) 
at javax.swing.JTable.prepareRenderer(JTable.java:5712) 
at javax.swing.plaf.basic.BasicTableUI.paintCell(BasicTableUI.java:2069) 
at javax.swing.plaf.basic.BasicTableUI.paintCells(BasicTableUI.java:1971) 
at javax.swing.plaf.basic.BasicTableUI.paint(BasicTableUI.java:1767) 
at javax.swing.plaf.ComponentUI.update(ComponentUI.java:143) 
at javax.swing.JComponent.paintComponent(JComponent.java:751) 
at javax.swing.JComponent.paint(JComponent.java:1017) 
at javax.swing.JComponent.paintChildren(JComponent.java:852) 
at javax.swing.JComponent.paint(JComponent.java:1026) 
at javax.swing.JViewport.paint(JViewport.java:747) 
at javax.swing.JComponent.paintChildren(JComponent.java:852) 
at javax.swing.JComponent.paint(JComponent.java:1026) 
at javax.swing.JComponent.paintChildren(JComponent.java:852) 
at javax.swing.JComponent.paint(JComponent.java:1026) 
at javax.swing.JComponent.paintChildren(JComponent.java:852) 
at javax.swing.JComponent.paint(JComponent.java:1026) 
at javax.swing.JComponent.paintChildren(JComponent.java:852) 
at javax.swing.JComponent.paint(JComponent.java:1026) 
at javax.swing.JComponent.paintToOffscreen(JComponent.java:5112) 
at javax.swing.BufferStrategyPaintManager.paint(BufferStrategyPaintManager.java:278) 
at javax.swing.RepaintManager.paint(RepaintManager.java:1220) 
at javax.swing.JComponent._paintImmediately(JComponent.java:5060) 
at javax.swing.JComponent.paintImmediately(JComponent.java:4870) 
at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:803) 
at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:714) 
at javax.swing.RepaintManager.seqPaintDirtyRegions(RepaintManager.java:694) 
at javax.swing.SystemEventQueueUtilities$ComponentWorkRequest.run(SystemEventQueueUtilities.java:125) 
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209) 
at java.awt.EventQueue.dispatchEvent(EventQueue.java:597) 
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269) 
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184) 
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174) 
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169) 
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161) 
at java.awt.EventDispatchThread.run(EventDispatchThread.java:122) 

的数据似乎更新罚款，但事情错了，它困扰着我，它甚至没有提及我的任何代码。一段时间调试后，我决定下面的代码行是造成问题的原因：

public class LoadingLogListThread extends Thread{ 

... 

public void run() { 

... 
int colNo = rsmd.getColumnCount(); 

while(rs.next()){ 
    Object[] objects = new Object[colNo]; 
    for(int i=0;i<colNo;i++){ 
     objects[i]=rs.getObject(i+1); 
    } 
    if(objects != null) 
     aModel.addRow(objects); 
    count++; 
} 

mainView.logEntryTable.setModel(aModel); 
... 

} 

的线程被创建，当我点击一个按钮来过滤列表，然后又回到了到开始数据库来获取更多可能超出已获取数据的数据。我打算稍后确定是否需要新的提取，并且仅在此情况下执行上述操作，否则仅过滤已提取的结果。

Answer 1

您需要更新Event Dispatch Thread上的模型。你正确地产生一个新的线程来执行一些工作，尤其是在数据从数据库中获取的时候。试试这个：

public class LoadingLogListThread extends Thread{ 

... 

public void run() { 

... 
int colNo = rsmd.getColumnCount(); 

while(rs.next()){ 
    Object[] objects = new Object[colNo]; 
    for(int i=0;i<colNo;i++){ 
     objects[i]=rs.getObject(i+1); 
    } 
    if(objects != null) 
     aModel.addRow(objects); 
    count++; 
} 

SwingUtilities.invokeLater(new Runnable() { 

    @Override 
    public void run() { 
     mainView.logEntryTable.setModel(aModel); 
    } 

}); 

... 

}