Question

我正在继承JTable并使用DefaultTableModel来建模我的表数据。以下类设置JTable，并向模型添加一行。

import java.io.File;
import java.util.Iterator;
import java.util.Vector;

import javax.swing.JTable;  
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableColumn;

public class SelectedFileTable extends JTable {
Vector<File> SelectedFiles = new Vector<File>(); 
DefaultTableModel Model    = new DefaultTableModel();

TableColumn ColumnName     = new TableColumn();
TableColumn ColumnSize     = new TableColumn();
TableColumn ColumnRmIcon   = new TableColumn(); 

ImageFilenameFilter Filter = new ImageFilenameFilter();

public SelectedFileTable() {
    super();
    this.setModel(Model);

    ColumnName.setHeaderValue(new String("Name") );
      ColumnName.setMinWidth(200);
    ColumnSize.setHeaderValue(new String("Size") );
      ColumnSize.setMinWidth(50); 
      ColumnSize.setMaxWidth(100);
    ColumnRmIcon.setHeaderValue(new String("Remove?") );
      ColumnRmIcon.setMaxWidth(100);
      ColumnRmIcon.setResizable(false);

    this.addColumn(ColumnName);
    this.addColumn(ColumnSize);
    this.addColumn(ColumnRmIcon);

    this.setShowVerticalLines(false);
    this.setShowHorizontalLines(true);
this.setAutoCreateColumnsFromModel(true);

this.addFile( new File("C:/temp/cfk.jpg") );
}
public void addFile(File file) {
    System.out.println("FileTable adding: " + file.getName() );
    if ( file.isDirectory() ) { 
        for ( File f : file.listFiles(Filter) ) {
            this.addFile(f);
        }
    } else { 
        if ( Filter.accept(file) ) {
            System.out.println("Accepting file; " + file.getName() );
            SelectedFiles.add(file);
            {
                String name = file.getName();
                Long size = new Long( file.length() );
                String tempstr = new String("X");

                System.out.println("RowItems before: " + Integer.toString(Model.getRowCount()) );
                Model.addRow( new Object[] { name, size, tempstr } );
                Model.fireTableDataChanged(); 
                System.out.println("RowItems start : " + Integer.toString(Model.getRowCount()) );
            }
            System.out.println("Done Accepting file; " + file.getName() );
        }
    }
}
public Iterator<File> iterator() { 
    return SelectedFiles.iterator();
}

}

在显示/可视化时，抛出以下异常：

Exception in thread "AWT-EventQueue-0" java.lang.ArrayIndexOutOfBoundsException: 0 >= 0
at java.util.Vector.elementAt(Vector.java:432)
at javax.swing.table.DefaultTableModel.getValueAt(DefaultTableModel.java:622)
at javax.swing.JTable.getValueAt(JTable.java:1903)
at javax.swing.JTable.prepareRenderer(JTable.java:3911)
at javax.swing.plaf.basic.BasicTableUI.paintCell(BasicTableUI.java:2072)
at javax.swing.plaf.basic.BasicTableUI.paintCells(BasicTableUI.java:1974)
at javax.swing.plaf.basic.BasicTableUI.paint(BasicTableUI.java:1897)
at javax.swing.plaf.ComponentUI.update(ComponentUI.java:142)
at javax.swing.JComponent.paintComponent(JComponent.java:743)
at javax.swing.JComponent.paint(JComponent.java:1006)
at javax.swing.JComponent.paintChildren(JComponent.java:843)
at javax.swing.JComponent.paint(JComponent.java:1015)
at javax.swing.JViewport.paint(JViewport.java:728)
at javax.swing.JComponent.paintChildren(JComponent.java:843)
at javax.swing.JComponent.paint(JComponent.java:1015)
at javax.swing.JComponent.paintChildren(JComponent.java:843)
at javax.swing.JComponent.paint(JComponent.java:1015)
at javax.swing.JComponent.paintChildren(JComponent.java:843)
at javax.swing.JComponent.paint(JComponent.java:1015)
at javax.swing.JComponent.paintChildren(JComponent.java:843)
at javax.swing.JComponent.paint(JComponent.java:1015)
at javax.swing.JComponent.paintChildren(JComponent.java:843)
at javax.swing.JComponent.paint(JComponent.java:1015)
at javax.swing.JLayeredPane.paint(JLayeredPane.java:559)
at javax.swing.JComponent.paintChildren(JComponent.java:843)
at javax.swing.JComponent.paintWithOffscreenBuffer(JComponent.java:4979)
at javax.swing.JComponent.paintDoubleBuffered(JComponent.java:4925)
at javax.swing.JComponent.paint(JComponent.java:996)
at java.awt.GraphicsCallback$PaintCallback.run(GraphicsCallback.java:21)
at sun.awt.SunGraphicsCallback.runOneComponent(SunGraphicsCallback.java:60)
at sun.awt.SunGraphicsCallback.runComponents(SunGraphicsCallback.java:97)
at java.awt.Container.paint(Container.java:1709)
at sun.awt.RepaintArea.paintComponent(RepaintArea.java:248)
at sun.awt.RepaintArea.paint(RepaintArea.java:224)
at sun.awt.windows.WComponentPeer.handleEvent(WComponentPeer.java:254)
at java.awt.Component.dispatchEventImpl(Component.java:4060)
at java.awt.Container.dispatchEventImpl(Container.java:2024)
at java.awt.Window.dispatchEventImpl(Window.java:1791)
at java.awt.Component.dispatchEvent(Component.java:3819)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:463)
at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:242)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:163)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:157)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:149)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:110)

我正在撕开我的头发 - 我无法找到这个极其简单的用例的根本原因。

Answer 1

我也遇到了这个问题（使用JList和DefaultListModel）。德米特里的回答是正确的。

然而，还有另外一件事：如果不在Swing的事件调度线程中修改模型，也可以抛出此异常。

执行以下操作可以帮助您避免此异常：

SwingUtilities.invokeLater(new Runnable(){public void run(){
    //Update the model here
}});

http://www.javakb.com/Uwe/Forum.aspx/java-gui/3012/JList-JScrollPane-DefaultListModel-Updating

Answer 2

我认为您需要向TableModel添加列。您的代码将UI列添加到表中，但不会将它们添加到模型

Answer 3

德米特里是对的。取代

this.addColumn(ColumnName);
this.addColumn(ColumnSize);
this.addColumn(ColumnRmIcon);

与

Model.addColumn(ColumnName);
Model.addColumn(ColumnSize);
Model.addColumn(ColumnRmIcon);

现在模型知道columsn并且当你试图向一个认为它有0列的模型添加一行时不会抛出异常

Answer 4

来自JTable.setAutoCreateColumnsFromModel（）API：

“如果autoCreateColumnsFromModel从false更改为true，则此方法调用createDefaultColumnsFromModel。”

Vector抛出ArrayIndexOutOfBoundsException - 如果索引超出范围（索引＆lt; 0 || index＆gt; = size（））

我认为表模型缺少列，正如Dmitry

所建议的那样

Answer 5

使用以下替换您的代码在这里，您需要删除应该为所有行迭代的第一行

private void refreshTable() {

   int rowCount= model.getRowCount();

  // System.out.println(rowCount);

   for(int i=0;i<rowCount;i++ ){
        model.removeRow(0);
        //System.out.println(i);
   }

}

Answer 6

使用RowSorter时，另一个问题可能相关。编辑模型时RowSorter 尝试以重新排序旧模型。它应该自动重新创建并在表模型的每个更改上重新运行。

您可以通过

修复它

tableModel = new DefaultTableModel(data, columnNames);
jTableSentence.setModel(tableModel);
jTableSentence.setRowSorter(new TableRowSorter(tableModel));
jTableSentence.setAutoCreateRowSorter(true);

-Hayri

Answer 7

我遇到了这个问题，因为我正在向JTable添加列和行而不是模型。

最好的方法就是这样。

Object[][]rows = new Object[ ][ ] { {"a","b"} , {"c","d"} };
Object[]columns = new Object[] {"column1","column2"};
JTable table = new JTable();
table.setModel(new DefaultTableModel(rows,columns));

Answer 8

替换

tabWindow.addTab(...);

带

SwingUtilities.invokeLater(new Runnable() {
    @Override public void run() {
        tabWindow.addTab(...);
    }
});

当您在动作侦听器中更改选项卡式窗格时，可能会发生这种情况。

Answer 9

德米特里是对的，但你只需要更新你的模型。为此，请在代码中添加以下内容：

DefaultTableModel dtm = (DefaultTableModel) table.getModel();
for (int c = 0; c < table.getColumnCount(); c++) {
dtm.addColumn(table.getColumnName(c));
}

Answer 10

有必要将isCellEditable方法添加到表模型类中，并返回false。

@Override
  public boolean isCellEditable(int row, int column)
  {
    return false;
  }

java.lang.ArrayIndexOutOfBoundsException：0＆gt; = 0试图填充JTable

10 个答案: