捕獲異常失敗

我嘗試捕獲ArrayIndexOutOfBoundsException，但它不起作用，我不明白爲什麼？你能給我一些想法或暗示，爲什麼會發生這種情況？捕獲異常失敗

public void actionPerformed(ActionEvent arg0) { 
       System.out.println(getSelectedUser()); 
       try{ 
        System.out.println("deleting id:" +Integer.parseInt((String)table.getModel().getValueAt(table.getSelectedRow(), 0))); 
        table.getModel().getValueAt(table.getSelectedRow(), 0))); 
       } catch (ArrayIndexOutOfBoundsException e){ 
        JOptionPane.showMessageDialog(frmBugSurveilance, "Please select an user!"); 
       } 
        catch (Exception e){ 
       JOptionPane.showMessageDialog(frmBugSurveilance, "Please select an user!"); 
      } 

       getUsers(); 
      } 
     });

我需要處理，其中用戶不點擊從JTable中某一行的情況下...

怎樣的程序崩潰：

Exception in thread "AWT-EventQueue-0" java.lang.ArrayIndexOutOfBoundsException: -1 
    at java.util.Vector.elementData(Unknown Source) 
    at java.util.Vector.elementAt(Unknown Source) 
    at javax.swing.table.DefaultTableModel.getValueAt(Unknown Source) 
    at view.AdminGui.getSelectedUser(AdminGui.java:237) 
    at view.AdminGui$3.actionPerformed(AdminGui.java:149) 
    at javax.swing.AbstractButton.fireActionPerformed(Unknown Source) 
    at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source) 
    at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source) 
    at javax.swing.DefaultButtonModel.setPressed(Unknown Source) 
    at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Source) 
    at java.awt.Component.processMouseEvent(Unknown Source) 
    at javax.swing.JComponent.processMouseEvent(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.LightweightDispatcher.retargetMouseEvent(Unknown Source) 
    at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source) 
    at java.awt.LightweightDispatcher.dispatchEvent(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$3.run(Unknown Source) 
    at java.awt.EventQueue$3.run(Unknown Source) 
    at java.security.AccessController.doPrivileged(Native Method) 
    at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source) 
    at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source) 
    at java.awt.EventQueue$4.run(Unknown Source) 
    at java.awt.EventQueue$4.run(Unknown Source) 
    at java.security.AccessController.doPrivileged(Native Method) 
    at java.security.ProtectionDomain$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)

來源

2013-05-25 Bogdan M.

地球上爲什麼你想要捕捉那個異常嗎？爲什麼不直接處理呢？只需修復任何方法將其拋出只接受有效的輸入。 – ddmps

這是因爲你的try塊是錯誤的地方。看看堆棧跟蹤這裏：

at view.AdminGui.getSelectedUser(AdminGui.java:237)

，並注意你正在調用該方法之前你try塊：

System.out.println(getSelectedUser());

改寫爲這樣的：

try{ 
    System.out.println(getSelectedUser()); 
    System.out.println("deleting id:" +Integer.parseInt((String)table.getModel().getValueAt(table.getSelectedRow(), 0))); 
    // ...

來源

2013-05-25 10:33:53

如果您使用像Eclipse或其他IDE這樣的符號調試器，那麼這個診斷特別容易，因爲它們會將您帶到發現錯誤的代碼行。 –

捕獲異常失敗

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