我有2个面板。一个是用户插入数据的地方，另一个JTable是显示结果的地方。
我的问题是当用户按下确定（在我的情况下适用）JButton时，数据被计算但未显示在 . 中JTable，没有任何变化JTable。
对于我来说JTable，我正在使用Bean Table Model来自tips4Java（http://tips4java.wordpress.com/2008/11/27/bean-table-model/）。
一件奇怪的事情是，如果我在程序启动时向表格发送数据（让我们称之为数据'A'），它会显示在表格上，如果稍后我尝试更新表格，表格不会更新。但是，当我在启动时不向表发送数据但尝试使用数据“A”更新/发送表时，它不会更新。
所以我的问题是，为什么不JTable显示我发送的任何数据？
这是我的代码：
启动处理并将数据发送到表的 JButton 侦听器：
crashForm.setFormListener(new FormListener() {
@Override
public void formEvent(OptionsFormEvent oe) {
String readTable = oe.getReadFromTable();
int access = oe.getAccess();
int transition = oe.getTransition();
boolean smooth = oe.isTrainCrash();
ArrayList<String> allTrains = new ArrayList<>();
List crashedTrainList = new ArrayList<>();
try {
allTrains = controller.getUniqueTrains(controller.connectServer(), readTable, "trainid");
} catch (Exception ex) {
JOptionPane.showMessageDialog(null, "An error occured while getting trains data\n"
+ "Error description: " + ex.getMessage(), "Error",
JOptionPane.ERROR_MESSAGE);
}
try {
for (int i = 0; i < allTrains.size(); i++)
{
ArrayList<Train> trainDataList = new ArrayList<>();
ArrayList<Train> crashedProccessedData = new ArrayList<>();
String query = "the sql query...";
trainDataList = controller.getTrainData(controller.connectServer(), readTable, query);
crashedProccessedData = controller.detectCrash(access, transition, trainDataList);
crashedTrainList.addAll(crashedProccessedData);
}
} catch (Exception ex) {
JOptionPane.showMessageDialog(null, "An error occured while detecting a crash.\n"
+ "Error description: " + ex.getMessage(), "Error",
JOptionPane.ERROR_MESSAGE);
}
System.out.println("Total crashes detected:" + crashedTrainList.size());
tablePanel.createTable(Train.class, crashedTrainList, true, false, tableLabels);
tablePanel.fireTableDataChanged();
}
});
}
这是我的 tablePanel 类：
public TablePanel() {
}
public void createTable(Class c, List data, boolean toolBarUp,
boolean toolBarBottom, ArrayList<String> labelsCheckBox) {
beanTableModel = new BeanTableModel(c, data);
columnModel = new XTableColumnModel();
table = new JTable(beanTableModel);
table.setColumnModel(columnModel);
table.createDefaultColumnsFromModel();
if(toolBarUp == true)
{
final JToolBar toolBarTop = new JToolBar();
// Create the Show ALL
JButton reset = new JButton("Reset");
reset.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
for(Component c : toolBarTop.getComponents()){
if(c instanceof JCheckBox){
JCheckBox checkBox = (JCheckBox) c;
checkBox.setSelected(false);
columnModel.setAllColumnsVisible();
}
}
int numberOfColumn = columnModel.getColumnCount();
for(int aux = 0; aux < numberOfColumn; aux++)
{
int num = columnModel.getColumnCount();
TableColumn column = columnModel.getColumnByModelIndex(aux);
columnModel.setColumnVisible(column, true);
}
}
});
toolBarTop.add(reset);
// Create a JCheckBox for each column
for(int i = 0; i < labelsCheckBox.size(); i++)
{
final int index = i;
toolBarTop.add(new JCheckBox(new AbstractAction(labelsCheckBox.get(i)) {
@Override
public void actionPerformed(ActionEvent e) {
TableColumn column = columnModel.getColumnByModelIndex(index);
boolean visible = columnModel.isColumnVisible(column);
columnModel.setColumnVisible(column, !visible);
}
}));
}
setLayout(new BorderLayout());
add(toolBarTop, BorderLayout.NORTH);
add(new JScrollPane(table), BorderLayout.CENTER);
// add(toolBarDown, BorderLayout.SOUTH);
}
final JToolBar toolBarDown = new JToolBar();
toolBarDown.add(new JButton(new AbstractAction("Save Table") {
@Override
public void actionPerformed(ActionEvent e) {
throw new UnsupportedOperationException("Not supported yet.");
}
}));
}
public void createTable(Class c, Class cAncestor) {
beanTableModel = new BeanTableModel(c, cAncestor);
table = new JTable(beanTableModel);
setLayout(new BorderLayout());
add(new JScrollPane(table), BorderLayout.CENTER);
}
public void createTable(Class c, Class cAncestor, List data) {
beanTableModel = new BeanTableModel(c, cAncestor, data);
table = new JTable(beanTableModel);
setLayout(new BorderLayout());
add(new JScrollPane(table), BorderLayout.CENTER);
beanTableModel.fireTableDataChanged();
}
public void createTable(Class c) {
beanTableModel = new BeanTableModel(c);
table = new JTable(beanTableModel);
setLayout(new BorderLayout());
add(new JScrollPane(table), BorderLayout.CENTER);
}
public void createTable(Class c, List data)
{
beanTableModel = new BeanTableModel(c, data);
table = new JTable(beanTableModel);
setLayout(new BorderLayout());
add(new JScrollPane(table), BorderLayout.CENTER);
}
//to refresh the table everytime there is an update
public void fireTableDataChanged()
{
beanTableModel.fireTableDataChanged();
}
再说一次，我的问题是：JTable每次我向它发送新数据时，我不是都没有更新新结果吗？