在jTable中填充结果时出现ArrayOutOfBoundException

Question

我尝试使用java swing进行搜索系统：

    public void search(ActionEvent e){
    String textEntered=getJTextField_searchField().getText();
    if(textEntered.equals("")){
        JOptionPane.showMessageDialog(null,"Please enter a word");
    }
    else{
        kioskViewevents viewEvents=new kioskViewevents(textEntered);
        if(viewEvents.searchContent() == true){
            getJScrollPane().setVisible(false);
            getJScrollPane_search();
        }
        else{
            JOptionPane.showMessageDialog(null,"No result found");
        }


    }
}

点击搜索按钮后将执行此方法。它将隐藏上一个表，然后替换为另一个表。然后我在表格中填充搜索结果。

    public void SetUpJTable_search(){
    DefaultTableModel tableModel = (DefaultTableModel) jTableSearch.getModel();

    String[] data = new String[5];
    db.setUp("IT Innovation Project");
    String sql = "Select event_ID,event_Price,event_Title,event_Time,event_Date FROM crossEvent WHERE event_Title='"+ textEntered +"'";

    ResultSet resultSet = null;
    resultSet = db.readRequest(sql);
    try {
        while (resultSet.next()) {
            data[0] = resultSet.getString("event_ID");
            data[1] = resultSet.getString("event_Price");
            data[2] = resultSet.getString("event_Title");
            data[3] = resultSet.getString("event_Time");
            data[4] = resultSet.getString("event_Date");
            tableModel.addRow(data);
        }
        resultSet.close();
    } catch (Exception e) {
        System.out.println(e);
    }

}

我设置了我的搜索表：

    private JTable getJTable_search() {
    String header[] = { "Event ID", "Price", "Title","Time","Date"};
    DefaultTableModel tableModel = (DefaultTableModel) jTable.getModel();
    tableModel.setColumnIdentifiers(header);
    jTableSearch.setAutoCreateColumnsFromModel(false);
    jTableSearch.getColumnModel().getColumn(0).setMinWidth(100);
    jTableSearch.getColumnModel().getColumn(0).setMaxWidth(100);

    jTableSearch.getColumnModel().getColumn(1).setMinWidth(200);
    jTableSearch.getColumnModel().getColumn(1).setMaxWidth(300);

    jTableSearch.getColumnModel().getColumn(2).setMinWidth(300);
    jTableSearch.getColumnModel().getColumn(2).setMaxWidth(400);

    jTableSearch.getColumnModel().getColumn(3).setMinWidth(100);
    jTableSearch.getColumnModel().getColumn(3).setMaxWidth(100);

    jTableSearch.getColumnModel().getColumn(4).setMinWidth(100);
    jTableSearch.getColumnModel().getColumn(4).setMaxWidth(100);


    jTableSearch.getTableHeader().setFont(new Font("Dialog", Font.PLAIN, 20));
    jTableSearch.getTableHeader().setForeground(Color.white);
    jTableSearch.getTableHeader().setBackground(new Color(102, 102, 102));
    jTableSearch.setRowHeight(50);
    jTableSearch.setBounds(new Rectangle(97, 157, 800, 450));
    jTableSearch.setFont(new Font("Dialog", Font.PLAIN, 18));

    return jTableSearch;
}

我的搜索表滚动窗格：

    private JScrollPane getJScrollPane_search(){
    if (jScrollPane_search == null) {
        jScrollPane_search = new JScrollPane();
        jScrollPane_search.setBounds(new Rectangle(75, 180, 800, 450));
        jScrollPane_search.setViewportView(getJTable_search());
    }
    SetUpJTable_search();
    return jScrollPane_search;
}

这整行代码是在执行搜索之前使用数据库中存在的数据填充表：

    private JTable getJTable() {
    String header[] = { "Event ID", "Price", "Title","Time","Date"};
    DefaultTableModel tableModel = (DefaultTableModel) jTable.getModel();
    tableModel.setColumnIdentifiers(header);
    // Hide Topic ID
    jTable.setAutoCreateColumnsFromModel(false);
    jTable.getColumnModel().getColumn(0).setMinWidth(100);
    jTable.getColumnModel().getColumn(0).setMaxWidth(100);

    jTable.getColumnModel().getColumn(1).setMinWidth(200);
    jTable.getColumnModel().getColumn(1).setMaxWidth(300);

    jTable.getColumnModel().getColumn(2).setMinWidth(300);
    jTable.getColumnModel().getColumn(2).setMaxWidth(400);

    jTable.getColumnModel().getColumn(3).setMinWidth(100);
    jTable.getColumnModel().getColumn(3).setMaxWidth(100);

    jTable.getColumnModel().getColumn(4).setMinWidth(100);
    jTable.getColumnModel().getColumn(4).setMaxWidth(100);

    jTable.getTableHeader().setFont(new Font("Dialog", Font.PLAIN, 20));
    jTable.getTableHeader().setForeground(Color.white);
    jTable.getTableHeader().setBackground(new Color(102, 102, 102));
    jTable.setRowHeight(50);
    jTable.setBounds(new Rectangle(97, 157, 800, 450));
    jTable.setFont(new Font("Dialog", Font.PLAIN, 18));

    return jTable;
}

    public void SetUpJTable() {
    DefaultTableModel tableModel = (DefaultTableModel) jTable.getModel();

    String[] data = new String[5];
    db.setUp("IT Innovation Project");
    String sql = "Select event_ID,event_Price,event_Title,event_Time,event_Date FROM crossEvent";

    ResultSet resultSet = null;

    resultSet = db.readRequest(sql);
    tableModel.getDataVector().removeAllElements();
    tableModel.fireTableDataChanged();
    try {
        while (resultSet.next()) {
            data[0] = resultSet.getString("event_ID");
            data[1] = resultSet.getString("event_Price");
            data[2] = resultSet.getString("event_Title");
            data[3] = resultSet.getString("event_Time");
            data[4] = resultSet.getString("event_Date");

            tableModel.addRow(data);
        }
        resultSet.close();
    } catch (Exception e) {
        System.out.println(e);
    }
}

但是，我收到一条错误消息：

    Exception in thread "AWT-EventQueue-0" java.lang.ArrayIndexOutOfBoundsException: 0 >= 0
at java.util.Vector.elementAt(Unknown Source)
at javax.swing.table.DefaultTableColumnModel.getColumn(Unknown Source)
at kioskViewevents.ui.ViewEventsUI.getJTable_search(ViewEventsUI.java:158)
at kioskViewevents.ui.ViewEventsUI.getJScrollPane_search(ViewEventsUI.java:201)
at kioskViewevents.ui.ViewEventsUI.search(ViewEventsUI.java:330)
at kioskViewevents.ui.ViewEventsUI$4.actionPerformed(ViewEventsUI.java:315)
at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
at javax.swing.AbstractButton$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$400(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.security.AccessControlContext$1.doIntersectionPrivilege(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.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)

任何指南？提前谢谢。

Answer 1

不确定哪一个是ViewEvents.java中的第158行（因为你还没有提到），但堆栈跟踪和剩余代码告诉我ArrayIndexOutOfBounds异常是因为你试图访问如下所示的列：

    jTable.getColumnModel().getColumn(4).setMaxWidth(100);  // Not sure which column is the issue

您在vector中没有那么多列，即jTable.getColumnModel()。您正在尝试访问超出矢量大小的元素。

出现此问题的原因/位置的确切问题可能有所不同，但这是您应该开始查看的地方。