java.lang.ArrayIndexOutOfBoundsException: 0 >= 0 尝试填充 JTable
我对 JTable 进行子类化并使用 DefaultTableModel 来对表数据进行建模。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,会引发以下异常:
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)
我正在抓狂 - 我无法找到这个极其简单的用例的根本原因。
I'm subclassing JTable and using a DefaultTableModel to model my table data. The following class sets up the JTable, and adds one row to the model.
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();
}
}
At display/visualization time, the following exception is thrown:
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)
I'm ripping my hair out - I haven't been able to find the root cause of this immensely simple use case.
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评论(10)
我也讨论过这个问题(使用 JList 和 DefaultListModel)。
德米特里的回答是正确的。
然而,还有一件事:
如果您不在 Swing 的事件调度线程中修改模型,也可能会抛出此异常。
执行以下操作可以帮助您避免此异常:
http:// www.javakb.com/Uwe/Forum.aspx/java-gui/3012/JList-JScrollPane-DefaultListModel-Updating
I ran on this issue too (with a JList and a DefaultListModel).
Dmitry's answer is right.
However, there is another thing:
this exception can also be thrown if you don't modify the model in Swing's Event Dispatch Thread.
Doing the following can help you avoid this exception:
http://www.javakb.com/Uwe/Forum.aspx/java-gui/3012/JList-JScrollPane-DefaultListModel-Updating
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
I think you need to add columns to your TableModel. Your code adds UI columns to the table but doesn't add them to the model
德米特里是对的。替换
为
,现在模型知道了列,并且当您尝试向认为有 0 列的模型添加行时,不再抛出异常
Dmitry is right. Replace
with
and now the Model knows about the columsn and won't throw an Exception anymore when you try to add a row to a model which thinks it has 0 columns
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 (index < 0 || index >= size())
I根据 Dmitry 的建议,猜测表模型缺少列
From the JTable.setAutoCreateColumnsFromModel() API:
"This method calls createDefaultColumnsFromModel if autoCreateColumnsFromModel changes from false to true. "
Vector throws ArrayIndexOutOfBoundsException - if the index is out of range ( index < 0 || index >= size())
I guess the table model is missing the columns, as suggested by Dmitry
将您的代码替换为以下内容
在这里,您只需要删除应该对所有行进行迭代的第一行
Replace your code with the following
Here you need to remove first row only that should be iterated for all the rows
替换
为
当您更改操作侦听器中的选项卡式窗格时,可能会发生这种情况。
replace
with
Such situation can hapen when you change tabbed pane in action listener.
当您使用
RowSorter
时,另一个问题可能会相关。当您编辑模型时,RowSorter
尝试对旧模型重新排序。它应该在表模型的每次更改时自动重新创建并重新运行。修复它
你可以通过-Hayri
Another issue might be related when you use
RowSorter
. When you edit the modelRowSorter
tries to re-sort the old model. It should be automatically re-created and re-run on each changes of table model.You can fix it by
-Hayri
我遇到这个问题是因为我将列和行添加到 JTable 而不是模型中。
最好的办法是这个。
I was facing this problem because i was adding columns and rows to the JTable not to the model.
best way is this.
德米特里是对的,但你只需要更新你的模型。
为此,请将以下内容添加到您的代码中:
Dmitry is right, but you simply have to update your model.
To do this, add the following to your code:
有必要将
isCellEditable
方法添加到您的表模型类中并返回 false。It is necessary to add
isCellEditable
method to your table model class with return false.