爲什麼我在線程「AWT-EventQueue-0」中得到異常java.lang.ArrayIndexOutOfBoundsException：2？

Question

我每次我試圖在我的JTable更新數據時收到此錯誤：

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) 

的數據似乎更新罰款，但事情錯了，它困擾着我，它甚至沒有提及我的任何代碼。一段時間調試後，我決定下面的代碼行是造成問題的原因：

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); 
... 

} 

的線程被創建，當我點擊一個按鈕來過濾列表，然後又回到了到開始數據庫來獲取更多可能超出已獲取數據的數據。我打算稍後確定是否需要新的提取，並且僅在此情況下執行上述操作，否則僅過濾已提取的結果。

Answer 1

您需要更新Event Dispatch Thread上的模型。你正確地產生一個新的線程來執行一些工作，尤其是在數據從數據庫中獲取的時候。試試這個：

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); 
    } 

}); 

... 

}