java - 线程 "AWT-EventQueue-0"java.lang.ArrayIndexOutOfBoundsException : -1 中的异常

Question

当我运行一个可能会删除行的方法时，以及之后当我尝试清除表行时，在表中抛出标题异常。谁能解释我为什么会这样？我不是 Java 专家。

异常(exception):

Exception in thread "AWT-EventQueue-0" java.lang.ArrayIndexOutOfBoundsException: -1
        at java.util.Vector.elementAt(Vector.java:430)
        at javax.swing.table.DefaultTableModel.getValueAt(DefaultTableModel.java:632)
        at javax.swing.JTable.getValueAt(JTable.java:2652)
        at classes.RowListener.displayRowValues(RowListener.java:40)
        at classes.RowListener.valueChanged(RowListener.java:32)
        at javax.swing.DefaultListSelectionModel.fireValueChanged(DefaultListSelectionModel.java:167)
        at javax.swing.DefaultListSelectionModel.fireValueChanged(DefaultListSelectionModel.java:147)
        at javax.swing.DefaultListSelectionModel.fireValueChanged(DefaultListSelectionModel.java:194)
        at javax.swing.DefaultListSelectionModel.removeIndexInterval(DefaultListSelectionModel.java:660)
        at javax.swing.JTable.tableRowsDeleted(JTable.java:4460)
        at javax.swing.JTable.tableChanged(JTable.java:4363)
        at javax.swing.table.AbstractTableModel.fireTableChanged(AbstractTableModel.java:280)
        at javax.swing.table.AbstractTableModel.fireTableRowsDeleted(AbstractTableModel.java:245)
        at javax.swing.table.DefaultTableModel.setNumRows(DefaultTableModel.java:304)
        at javax.swing.table.DefaultTableModel.setRowCount(DefaultTableModel.java:322)
        at saraentry.MainFace.clearTable(MainFace.java:73)
        at saraentry.MainFace.jButton1ActionPerformed(MainFace.java:578)
        at saraentry.MainFace.access$1200(MainFace.java:32)
        at saraentry.MainFace$14.actionPerformed(MainFace.java:424)
        at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1995)
        at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2318)
        at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387)
        at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242)
        at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:236)
        at java.awt.Component.processMouseEvent(Component.java:6038)
        at javax.swing.JComponent.processMouseEvent(JComponent.java:3260)
        at java.awt.Component.processEvent(Component.java:5803)
        at java.awt.Container.processEvent(Container.java:2058)
        at java.awt.Component.dispatchEventImpl(Component.java:4410)
        at java.awt.Container.dispatchEventImpl(Container.java:2116)
        at java.awt.Component.dispatchEvent(Component.java:4240)
        at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4322)
        at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3986)
        at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3916)
        at java.awt.Container.dispatchEventImpl(Container.java:2102)
        at java.awt.Window.dispatchEventImpl(Window.java:2429)
        at java.awt.Component.dispatchEvent(Component.java:4240)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
        at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:273)
        at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:183)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:173)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:168)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:160)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:121)
BUILD SUCCESSFUL (total time: 20 seconds)

代码:

public class MainFace extends javax.swing.JFrame {

public String selectedRaw, tColSqNum, tColJobNo, tColDecName, tColDate;
String pendingDate, getTDate;

/** Creates new form MainFace */
public MainFace() {
    theme.theme();
    initComponents();
    newJob.setMnemonic(KeyEvent.VK_N);
    setLocationRelativeTo(null);
    DefaultTableModel tm = (DefaultTableModel) jTable1.getModel();
    tm.setRowCount(0);
    ListSelectionModel selectionModel = jTable1.getSelectionModel();
    selectionModel.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
    selectionModel.addListSelectionListener(new RowListener(this));
    DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");
    Date Sysdate = new Date();
    lblDate.setText(dateFormat.format(Sysdate));
    jXDatePicker1.setFormats(dateFormat);
    Jobs();
}

public void Jobs() {
    try {
        Connection c = DB.myConnection();
        ResultSet rs = c.createStatement().executeQuery("SELECT * FROM totjobno WHERE ID='todayjob' AND date=('" + lblDate.getText().trim() + "')");
        while (rs.next()) {
            String x = rs.getString("TotJobNo");
            lblCuJobNo.setText(x);
        }
        c.close();
        rs.close();
    } catch (Exception e) {
        e.printStackTrace();
    }
}

private void clearTable() {
}

private void pendingList2(String getDate) {
    try {
        Connection c = DB.myConnection();
        Statement s = c.createStatement();
        DefaultTableModel tm33 = (DefaultTableModel) jTable1.getModel();
        tm33.setRowCount(0);
        ResultSet r = s.executeQuery("SELECT * FROM newjobsheet WHERE date=('" + getDate + "') ORDER BY sqNumber ");
        while (r.next()) {
            Vector v = new Vector();
            v.addElement(r.getString("sqNumber"));
            v.addElement(r.getString("date"));
            v.addElement(r.getString("JobNumber"));
            v.addElement(r.getString("DecName"));
            tm33.addRow(v);
        }
    } catch (ArrayIndexOutOfBoundsException e) {
        JOptionPane.showMessageDialog(this, "Press OK!!", "Error!", JOptionPane.ERROR_MESSAGE);
    } catch (Exception e) {
        e.printStackTrace();
    }
}

private void btnAllPendingActionPerformed(java.awt.event.ActionEvent evt) {                                              
    jXDatePicker1.setDate(null);
    try {
        DefaultTableModel tm33 = (DefaultTableModel) jTable1.getModel();
        tm33.setRowCount(0);
        Connection c = DB.myConnection();
        Statement s = c.createStatement();
        ResultSet r = s.executeQuery("SELECT * FROM newjobsheet ORDER BY sqNumber ");
        while (r.next()) {
            Vector v2 = new Vector();
            v2.addElement(r.getString("sqNumber"));
            v2.addElement(r.getString("date"));
            v2.addElement(r.getString("JobNumber"));
            v2.addElement(r.getString("DecName"));
            tm33.addRow(v2);
        }
    } catch (ArrayIndexOutOfBoundsException e) {
        JOptionPane.showMessageDialog(this, "Press OK!!", "Error!", JOptionPane.ERROR_MESSAGE);
    } catch (Exception e) {
        e.printStackTrace();
    }
}

Answer 1

请检查发生了什么:

classes.RowListener.displayRowValues(RowListener.java:40) 在 classes.RowListener.valueChanged(RowListener.java:32) 在

它们似乎是你自己的类。

特别是如果您在调用 setRowCount(0) 之前选择表中的任何行，则可能会生成选择更改事件，第一个或最后一个索引为 -1。

因此，您可能应该在继续进行之前添加对索引值是否有效的检查。

如果您运行以下代码并选择表格中的第二行，您将看到以 -1 作为第一个索引触发的选择事件。所以你应该在你的 RowListener 中防止同样的事情发生。

public static void main(String[] args) throws Exception
{
    JTable table = new JTable();
    DefaultTableModel model = (DefaultTableModel) table.getModel();
    model.addColumn("A");
    model.addRow(new String[]{"A"});
    model.addRow(new String[]{"A"});

    JFrame f = new JFrame();
    f.add(table);
    f.pack();
    f.setDefaultCloseOperation(f.EXIT_ON_CLOSE);
    f.setVisible(true);

    table.getSelectionModel().addListSelectionListener(new ListSelectionListener() {            
        @Override
        public void valueChanged(ListSelectionEvent e)
        {
            System.out.println(e.getFirstIndex() + ":" + e.getLastIndex());                
        }
    });

    Thread.sleep(10000);
    model.setRowCount(0);
}