Question

我正在尝试以编程方式更新JTable（此处：prosumerTable），使用SwingUtilities.invokeLater将其从EventDispatchThread-

中启动

确切地说，我必须完全替换内容，因此我只是删除所有行并添加新行 - 这样可以正常工作：

SwingUtilities.invokeLater(new Runnable() {
        @Override
        public void run() {

            controlledProsumers = v.getControlledProsumers();
            if (model.getRowCount() > 0) {
                for (int i = model.getRowCount() - 1; i > -1; i--) {
                    model.removeRow(i);
                }
            }

            Iterator<Prosumer> it = controlledProsumers.iterator();
            while (it.hasNext()) {
                Prosumer p = it.next();
                model.addRow(new Object[] { p.getProsumerName(), p.getProsumerType(), p.getChangeRate(), p.getMinimalOutput(), p.getMaximalOutput(),
                        p.getRealOutput(), p.getPredictedOutput(), p.getCredibility(), p.getReliability(), p.getPrice(), new MiniOutputPanel(p), p });

            }
            prosumerTable.packAll();
        }

但是如果我添加一个MouseListener

的MouseListener：

prosumerTable.addMouseListener(new MouseAdapter() {
        public void mouseClicked(MouseEvent e) {

            if (e.getClickCount() == 2) {
                JTable target = (JTable) e.getSource();
                int row = target.getSelectedRow();
                // int column = target.getSelectedColumn();

                Prosumer p = (Prosumer) model.getValueAt(row, model.getColumnCount() - 1);
                CommandInspectNode c1 = new CommandInspectNode(p, false);
                c1.execute();
            }

        }
    });

对点击事件作出反应我得到例外。

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 gui.prosumerViews.subpanels.controlledProsumersAvPP.ControlledProsumersAVPPPanel$1.mouseClicked(ControlledProsumersAVPPPanel.java:85)
at java.awt.AWTEventMulticaster.mouseClicked(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$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)

即此处，我尝试访问tableModel：

Prosumer p = (Prosumer) model.getValueAt(row, model.getColumnCount() - 1);

我假设使用EventDispatchThread来更新SwingComponents就足以避免这种类型的异常了 - 或者我在这里咆哮错误的树？

Answer 1

在addMouseListener，

int row = target.getSelectedRow();

如果没有选择行，则上面的语句将返回-1 。

所以你得到ArrayIndexOutOfBoundsException。

因此，在调用model.getValueAt(row, model.getColumnCount() - 1);语句之前，请尝试检查是否选择了行。

int row = target.getSelectedRow();
// int column = target.getSelectedColumn();
if(row != -1) {
   Prosumer p = (Prosumer) model.getValueAt(row, model.getColumnCount() - 1);
   CommandInspectNode c1 = new CommandInspectNode(p, false);
   c1.execute();
}

尽管使用了invokeLater，但在线程“AWT-EventQueue-0”中存在异常

1 个答案: