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java.lang.arrayindexoutofboundsException:0>=0正在尝试填充jtable

jtable swing java

Chris K · 技术社区 · 15 年前

我正在对jtable进行子类化,并使用defaultTableModel对我的表数据进行建模。下面的类设置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,引发以下异常:

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)

我把头发扯了出来——我还没有找到这个非常简单的用例的根本原因。

10 回复 | 直到 7 年前

Dmitry 15 年前

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

Nightfirecat peSHIr 13 年前

我也讨论过这个问题(使用jlist和defaultlistmodel)。德米特里的回答是对的。

然而,还有一件事: 如果不在Swing的事件调度线程中修改模型,也可以引发此异常。

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

jitter 15 年前

德米特里是对的。替换

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

具有

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

现在模型知道了columsn,当您试图向一个认为它有0列的模型添加一行时,它不会再抛出异常。

Thimmayya 15 年前

从jtable.setAutoCreateColumnsFromModel()API:

“如果autoCreateColumnsFromModel从false更改为true,则此方法将调用CreateDefaultColumnsFromModel。”

vector throws arrayindexoutofboundsException-如果索引超出范围(index<0 index>=size())

我想表模型缺少列,正如dmitry建议的那样。

Chris K 14 年前

将代码替换为以下内容 在这里,您只需要删除第一行,对于所有行应该迭代该行。

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);
   }

}

Bruno Vieira 12 年前

另一问题可以使用时保持联系 RowSorter . 编辑模型时 行排序器 尝试重新排序旧模型。它应该自动重新创建,并在表模型的每个更改上重新运行。

你可以通过

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

-海里

Peter Tretyakov 10 年前

我正面临这个问题,因为我在向jtable添加列和行,而不是向模型添加列和行。

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

yuriy 13 年前

代替

tabWindow.addTab(...);

具有

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

当您在ActionListener中更改选项卡式窗格时,可能会发生这种情况。

Eldorim 8 年前

dmitry是对的,但您只需更新您的模型。要执行此操作,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));
}

chamzz.dot 7 年前

有必要增加 isCellEditable 方法,返回false。

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