设置行过滤器的表中的getValueAt时发生ArrayOutOfBoundException

问题描述

当我想从表中获取一个单元格值(经过过滤搜索后)并选择该行并执行returnAction()时，就会发生异常.

When i want to get a cell value from my table (after search with filtering) and select that row and execute the returnAction() , Exception occur.

我的代码:

public class BookPage_User extends JFrame implements ActionListener {

private JButton returnBookBtn;
private JTextField filterTF;
private TableRowSorter sorter;
private JTable table;
private BookJDBC bookJDBC;
private BookModel model;

public BookPage_User(String[] enterUserInfo, String userId) {
    bookJDBC = new BookJDBC();
    model = new BookModel(bookJDBC.getData(), bookJDBC.getColumn());

    sorter = new TableRowSorter<TableModel>(model);
    table = new JTable(model);
    table.setRowSorter(sorter);

    add(createForm(), BorderLayout.NORTH);
    add(new JScrollPane(table), BorderLayout.CENTER);

    RowFilter<BookModel, Object> rf = null;
    rf = RowFilter.regexFilter(filterTF.getText(), 0);
    sorter.setRowFilter(rf);

    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    setSize(850, 600);
    setVisible(true);
}
public JPanel createForm() {
    JPanel panel = new JPanel(new FlowLayout(FlowLayout.LEFT));
    returnBookBtn = new JButton("Return Book");
    filterTF = new JTextField(10);
    filterTF.getDocument().addDocumentListener(new DocumentListener() {
        @Override
        public void insertUpdate(DocumentEvent e) {
            String key = filterTF.getText().trim();
            if (key.length() == 0) sorter.setRowFilter(null);
            else sorter.setRowFilter(RowFilter.regexFilter(key, 1));
        }

        @Override
        public void removeUpdate(DocumentEvent e) {
            String key = filterTF.getText().trim();
            if (key.length() == 0) sorter.setRowFilter(null);
            else sorter.setRowFilter(RowFilter.regexFilter(key, 1));
        }

        @Override
        public void changedUpdate(DocumentEvent e) {
            //To change body of implemented methods use File | Settings | File Templates.
        }
    });

    returnBookBtn.addActionListener(this);
    panel.add(returnBookBtn);
    panel.add(filterTF);
    return panel;
}
@Override
public void actionPerformed(ActionEvent e) {
    if (e.getSource() == returnBookBtn) returnAction();
}

public void returnAction() {
    if (table.getSelectedRow() > -1) {
        int rowInTable = table.getSelectedRow();
        int rowInModel = table.convertRowIndexToModel(rowInTable);
        String oldStatus = String.valueOf(table.getValueAt(rowInModel, 3));  // Exception occur here!
        String returnBookId = String.valueOf(table.getValueAt(rowInModel, 0));
        if (oldStatus.equalsIgnoreCase("Yes")) {
                model.updateBooksTableReturnAction(rowInModel);
                model.deleteFromBorrowTable(returnBookId);
        } else {
            JOptionPane.showMessageDialog(null, "This Book Not Borrowed");
            return;
        }
    } else JOptionPane.showMessageDialog(null, "Select a book");
}

我遇到的异常如下-

Exception in thread "AWT-EventQueue-0" java.lang.ArrayIndexOutOfBoundsException: 8
at javax.swing.DefaultRowSorter.convertRowIndexToModel(DefaultRowSorter.java:518)
at javax.swing.JTable.convertRowIndexToModel(JTable.java:2645)
at javax.swing.JTable.getValueAt(JTable.java:2720)
at Project.BookPage_User.returnAction(BookPage_User.java:125)
at Project.BookPage_User.actionPerformed(BookPage_User.java:95)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2018)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2341)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:252)
at java.awt.Component.processMouseEvent(Component.java:6505)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3321)
at java.awt.Component.processEvent(Component.java:6270)
at java.awt.Container.processEvent(Container.java:2229)
at java.awt.Component.dispatchEventImpl(Component.java:4861)
at java.awt.Container.dispatchEventImpl(Container.java:2287)
at java.awt.Component.dispatchEvent(Component.java:4687)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4832)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4492)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4422)
at java.awt.Container.dispatchEventImpl(Container.java:2273)
at java.awt.Window.dispatchEventImpl(Window.java:2719)
at java.awt.Component.dispatchEvent(Component.java:4687)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:723)
at java.awt.EventQueue.access$200(EventQueue.java:103)
at java.awt.EventQueue$3.run(EventQueue.java:682)
at java.awt.EventQueue$3.run(EventQueue.java:680)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:87)
at java.awt.EventQueue$4.run(EventQueue.java:696)
at java.awt.EventQueue$4.run(EventQueue.java:694)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:693)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:91)

推荐答案

我假设(或者这实际上是原因)，您实际上遇到了以下行的问题:

I am assuming(or this is actually the reason), You are actually having the issue with the following line:

String oldStatus = String.valueOf(table.getValueAt(rowInModel, 3));

JTable.getValueAt(row, col)方法将通过将单元格(row, col)的值转换为 model-index 来返回单元格(row, col)的值，其中(row, col)是 view-index .让我们来看看JTable类的源代码:

JTable.getValueAt(row, col) method will return the value of the cell (row, col) by converting them to model-index where (row, col) is view-index. Let use look into the source of JTable class:

public Object getValueAt(int row, int column) {
        return getModel().getValueAt(convertRowIndexToModel(row),
                                     convertColumnIndexToModel(column));
    }

因此，您传递给此函数的(row, col)应该属于视图而不是模型.在您的上下文中为rowInTable.从table.convertRowIndexToModel(rowInTable)获得的rowInModel已经是模型索引.通过调用JTable.getValueAt(rowInModel, 3)，您实际上是在尝试将模型索引转换为另一个模型索引，从而导致计算错误.

So your passed (row, col) to this function should belongs to the view, instead of model. In your context which is rowInTable. The rowInModel is already a model index as you got it from table.convertRowIndexToModel(rowInTable). By calling JTable.getValueAt(rowInModel, 3) you are essentially trying to convert a model index to another model index resulting in computational error.

这篇关于设置行过滤器的表中的getValueAt时发生ArrayOutOfBoundException的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！