Validate user-entered text in JTable

Question

How do I validate user entered text in JTable cell, so only the values 1234567890. are acceptet? The cell should contain only doubles....

Answer 1

import java.awt.*;
import javax.swing.*;
import javax.swing.table.*;
public class aslan extends JFrame {
  public aslan() {
    TableModel model = new CustomTableModel();
    JTable table = new JTable(model);
    getContentPane().add(new JScrollPane(table), "Center");
    setDefaultCloseOperation(EXIT_ON_CLOSE);
    setSize(300,200);
    setLocation(300,300);
    setVisible(true);
  private class CustomTableModel extends AbstractTableModel {
    String[] headings = new String[] {
      "Cost", "Item", "Type"
    Object[][] data = new Object[][] {
      { new Double(12.75), "glue",   "tube" },
      { new Double(15.20), "hammer", "claw" },
      { new Double(8.32),  "saw",    "hack" }
    public int getRowCount() {
      return data.length;
    public int getColumnCount() {
      return data[0].length;
    public Object getValueAt(int row, int column) {
      return data[row][column];
    public void setValueAt(Object value, int row, int column) {
      data[row][column] = value;
      fireTableDataChanged();
    public String getColumnName(int column) {
      return headings[column];
    public Class getColumnClass(int column) {
      return data[0][column].getClass();
    public boolean isCellEditable(int row, int column) {
      return true;
  public static void main(String[] args) {
    new aslan();
}