在我看来，您有三个基本选择...
你可以...
将CellEditorListener 附加到DefaultCellEditor 并监视editingStopped 事件...
editor.addCellEditorListener(new CellEditorListener() {
@Override
public void editingStopped(ChangeEvent e) {
System.out.println("Editing stopped");
TableCellEditor editor = (TableCellEditor) e.getSource();
Object value = editor.getCellEditorValue();
System.out.println("Selected value = " + value);
}
@Override
public void editingCanceled(ChangeEvent e) {
}
});
问题在于，实际上无法确定已编辑的单元格。即使引用了JTable，当您收到此事件时，表格已不再处于编辑模式...所以您只知道编辑器的值...
你可以...
将TableModelListener 附加到TableModel...
model.addTableModelListener(new TableModelListener() {
@Override
public void tableChanged(TableModelEvent e) {
int type = e.getType();
switch (type) {
case TableModelEvent.UPDATE:
if (e.getFirstRow() - e.getLastRow() == 0) {
TableModel model = (TableModel) e.getSource();
int row = e.getFirstRow();
int col = e.getColumn();
System.out.println("Update " + row + "x" + col + " = " + model.getValueAt(row, col));
}
break;
}
}
});
这将让您知道单元格的值何时发生变化（以及许多其他事情，但这是我们感兴趣的），它不会告诉您什么是它发生变化的原因。
这种方法很好，因为它提供了您需要知道的所有信息，以便找到值和单元格。
你可以...
只需覆盖TableModel 的setValueAt 方法并提供您自己的某种通知...
虽然这有点重复 TableModelListener 的功能，但您可以设计事件信息，以便它提供更多相关信息，因为 TableModelEvent 涵盖了很多用户案例...
示例
以下是采用TableRenderDemo 并修改以演示前两个概念的示例
import java.awt.BorderLayout;
import javax.swing.DefaultCellEditor;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.AbstractTableModel;
import javax.swing.table.DefaultTableCellRenderer;
import javax.swing.table.TableCellRenderer;
import javax.swing.table.TableColumn;
import java.awt.Component;
import java.awt.Dimension;
import javax.swing.event.CellEditorListener;
import javax.swing.event.ChangeEvent;
import javax.swing.event.TableModelEvent;
import javax.swing.event.TableModelListener;
import javax.swing.table.TableCellEditor;
import javax.swing.table.TableModel;
/**
* TableRenderDemo is just like TableDemo, except that it explicitly initializes
* column sizes and it uses a combo box as an editor for the Sport column.
*/
public class TableRenderDemo extends JPanel {
public TableRenderDemo() {
super(new BorderLayout());
JTable table = new JTable(new MyTableModel());
table.setPreferredScrollableViewportSize(new Dimension(500, 70));
table.setFillsViewportHeight(true);
//Create the scroll pane and add the table to it.
JScrollPane scrollPane = new JScrollPane(table);
//Set up column sizes.
initColumnSizes(table);
//Fiddle with the Sport column's cell editors/renderers.
setUpSportColumn(table, table.getColumnModel().getColumn(2));
//Add the scroll pane to this panel.
add(scrollPane);
}
/*
* This method picks good column sizes.
* If all column heads are wider than the column's cells'
* contents, then you can just use column.sizeWidthToFit().
*/
private void initColumnSizes(JTable table) {
MyTableModel model = (MyTableModel) table.getModel();
model.addTableModelListener(new TableModelListener() {
@Override
public void tableChanged(TableModelEvent e) {
int type = e.getType();
switch (type) {
case TableModelEvent.UPDATE:
if (e.getFirstRow() - e.getLastRow() == 0) {
TableModel model = (TableModel) e.getSource();
int row = e.getFirstRow();
int col = e.getColumn();
System.out.println("Update " + row + "x" + col + " = " + model.getValueAt(row, col));
}
break;
}
}
});
TableColumn column = null;
Component comp = null;
int headerWidth = 0;
int cellWidth = 0;
Object[] longValues = model.longValues;
TableCellRenderer headerRenderer
= table.getTableHeader().getDefaultRenderer();
for (int i = 0; i < 5; i++) {
column = table.getColumnModel().getColumn(i);
comp = headerRenderer.getTableCellRendererComponent(
null, column.getHeaderValue(),
false, false, 0, 0);
headerWidth = comp.getPreferredSize().width;
comp = table.getDefaultRenderer(model.getColumnClass(i)).
getTableCellRendererComponent(
table, longValues[i],
false, false, 0, i);
cellWidth = comp.getPreferredSize().width;
column.setPreferredWidth(Math.max(headerWidth, cellWidth));
}
}
public void setUpSportColumn(final JTable table,
TableColumn sportColumn) {
//Set up the editor for the sport cells.
JComboBox comboBox = new JComboBox();
comboBox.addItem("Snowboarding");
comboBox.addItem("Rowing");
comboBox.addItem("Knitting");
comboBox.addItem("Speed reading");
comboBox.addItem("Pool");
comboBox.addItem("None of the above");
TableCellEditor editor = new DefaultCellEditor(comboBox);
editor.addCellEditorListener(new CellEditorListener() {
@Override
public void editingStopped(ChangeEvent e) {
System.out.println("Editing stopped");
TableCellEditor editor = (TableCellEditor) e.getSource();
Object value = editor.getCellEditorValue();
System.out.println("Selected value = " + value);
}
@Override
public void editingCanceled(ChangeEvent e) {
}
});
sportColumn.setCellEditor(editor);
//Set up tool tips for the sport cells.
DefaultTableCellRenderer renderer
= new DefaultTableCellRenderer();
renderer.setToolTipText("Click for combo box");
sportColumn.setCellRenderer(renderer);
}
class MyTableModel extends AbstractTableModel {
private String[] columnNames = {"First Name",
"Last Name",
"Sport",
"# of Years",
"Vegetarian"};
private Object[][] data = {
{"Kathy", "Smith",
"Snowboarding", new Integer(5), new Boolean(false)},
{"John", "Doe",
"Rowing", new Integer(3), new Boolean(true)},
{"Sue", "Black",
"Knitting", new Integer(2), new Boolean(false)},
{"Jane", "White",
"Speed reading", new Integer(20), new Boolean(true)},
{"Joe", "Brown",
"Pool", new Integer(10), new Boolean(false)}
};
public final Object[] longValues = {"Jane", "Kathy",
"None of the above",
new Integer(20), Boolean.TRUE};
@Override
public int getColumnCount() {
return columnNames.length;
}
@Override
public int getRowCount() {
return data.length;
}
@Override
public String getColumnName(int col) {
return columnNames[col];
}
@Override
public Object getValueAt(int row, int col) {
return data[row][col];
}
/*
* JTable uses this method to determine the default renderer/
* editor for each cell. If we didn't implement this method,
* then the last column would contain text ("true"/"false"),
* rather than a check box.
*/
@Override
public Class getColumnClass(int c) {
return getValueAt(0, c).getClass();
}
/*
* Don't need to implement this method unless your table's
* editable.
*/
@Override
public boolean isCellEditable(int row, int col) {
//Note that the data/cell address is constant,
//no matter where the cell appears onscreen.
if (col < 2) {
return false;
} else {
return true;
}
}
/*
* Don't need to implement this method unless your table's
* data can change.
*/
@Override
public void setValueAt(Object value, int row, int col) {
data[row][col] = value;
fireTableCellUpdated(row, col);
}
}
/**
* Create the GUI and show it. For thread safety, this method should be
* invoked from the event-dispatching thread.
*/
private static void createAndShowGUI() {
//Create and set up the window.
JFrame frame = new JFrame("TableRenderDemo");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//Create and set up the content pane.
TableRenderDemo newContentPane = new TableRenderDemo();
newContentPane.setOpaque(true); //content panes must be opaque
frame.setContentPane(newContentPane);
//Display the window.
frame.pack();
frame.setVisible(true);
}
public static void main(String[] args) {
//Schedule a job for the event-dispatching thread:
//creating and showing this application's GUI.
javax.swing.SwingUtilities.invokeLater(new Runnable() {
public void run() {
createAndShowGUI();
}
});
}
}