一种方法是检查更新事件，以查看事件用于哪一列，并忽略自动更新的列：
import java.awt.*;import javax.swing.*;import javax.swing.event.*;import javax.swing.table.*;public class TableProcessing extends Jframe implements TableModelListener{ public TableProcessing() { super("Table"); String[] columnNames = {"Item", "Quantity", "Price", "Cost"}; Object[][] data = { {"Bread", new Integer(1), new Double(1.11), new Double(1.11)}, {"Milk", new Integer(1), new Double(2.22), new Double(2.22)}, {"Tea", new Integer(1), new Double(3.33), new Double(3.33)}, {"Cofee", new Integer(1), new Double(4.44), new Double(4.44)} }; DefaultTableModel model = new DefaultTableModel(data, columnNames); model.addTableModelListener( this ); JTable table = new JTable( model ) { // Returning the Class of each column will allow different // renderers to be used based on Class public Class getColumnClass(int column) { return getValueAt(0, column).getClass(); } // The Cost is not editable public boolean isCellEditable(int row, int column) { int modelColumn = convertColumnIndexToModel( column ); return (modelColumn == 3) ? false : true; } }; table.setPreferredScrollableViewportSize(table.getPreferredSize()); JScrollPane scrollPane = new JScrollPane( table ); getContentPane().add( scrollPane ); String[] items = { "Bread", "Milk", "Tea", "Coffee" }; JComboBox editor = new JComboBox( items ); DefaultCellEditor dce = new DefaultCellEditor( editor ); table.getColumnModel().getColumn(0).setCellEditor(dce); } public void tableChanged(TableModelEvent e) { if (e.getType() == TableModelEvent.UPDATE) { int row = e.getFirstRow(); int column = e.getColumn(); if (column == 1 || column == 2) { TableModel model = (TableModel)e.getSource(); int quantity = ((Integer)model.getValueAt(row, 1)).intValue(); double price = ((Double)model.getValueAt(row, 2)).doublevalue(); Double value = new Double(quantity * price); model.setValueAt(value, row, 3); } } } public static void main(String[] args) { TableProcessing frame = new TableProcessing(); frame.setDefaultCloseOperation( EXIT_ON_CLOSE ); frame.pack(); frame.setLocationRelativeTo( null ); frame.setVisible(true); }}
