Ответ 1
Я не уверен, что он добавляет много, но я получил ожидаемый Caused by, используя вариант takteek answer, показанный ниже. Я запустил его из командной строки, чтобы убедиться, что среда IDE не помогла.
$ java -cp build/classes TableWithExecutor
StartShedule: PENDING -> STARTED
java.util.concurrent.ExecutionException: java.lang.ArrayIndexOutOfBoundsException: Array index out of range: 2
at java.util.concurrent.FutureTask$Sync.innerGet(FutureTask.java:222)
at java.util.concurrent.FutureTask.get(FutureTask.java:83)
at javax.swing.SwingWorker.get(SwingWorker.java:582)
at TableWithExecutor$MyTask.done(TableWithExecutor.java:103)
at javax.swing.SwingWorker$5.run(SwingWorker.java:717)
at javax.swing.SwingWorker$DoSubmitAccumulativeRunnable.run(SwingWorker.java:814)
at sun.swing.AccumulativeRunnable.run(AccumulativeRunnable.java:95)
at javax.swing.SwingWorker$DoSubmitAccumulativeRunnable.actionPerformed(SwingWorker.java:824)
at javax.swing.Timer.fireActionPerformed(Timer.java:291)
at javax.swing.Timer$DoPostEvent.run(Timer.java:221)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:677)
at java.awt.EventQueue.access$000(EventQueue.java:85)
at java.awt.EventQueue$1.run(EventQueue.java:638)
at java.awt.EventQueue$1.run(EventQueue.java:636)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:647)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:296)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:211)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:201)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:196)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:188)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)
Caused by: java.lang.ArrayIndexOutOfBoundsException: Array index out of range: 2
at java.util.Vector.get(Vector.java:694)
at TableWithExecutor.changeTableValues(TableWithExecutor.java:64)
at TableWithExecutor.access$100(TableWithExecutor.java:14)
at TableWithExecutor$MyTask.doInBackground(TableWithExecutor.java:92)
at TableWithExecutor$MyTask.doInBackground(TableWithExecutor.java:80)
at javax.swing.SwingWorker$1.call(SwingWorker.java:277)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
at java.util.concurrent.FutureTask.run(FutureTask.java:138)
at javax.swing.SwingWorker.run(SwingWorker.java:316)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:680)
StartShedule: STARTED -> DONE
Полный код:
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.event.ActionEvent;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import java.text.DateFormat;
import java.util.Date;
import java.util.List;
import java.util.concurrent.Executor;
import java.util.concurrent.Executors;
import javax.swing.*;
import javax.swing.table.*;
/** @see https://stackoverflow.com/questions/7054627 */
public class TableWithExecutor extends JFrame {
private static final int delay = 1000;
private static final DateFormat df = DateFormat.getTimeInstance();
private String[] columnNames = {"Product", "Availability"};
private Object[][] data = {columnNames, columnNames, columnNames};
private DefaultTableModel model;
private JTable table;
private Executor executor = Executors.newCachedThreadPool();
private Timer timer;
public TableWithExecutor() {
model = new DefaultTableModel(data, columnNames);
table = new JTable(model) {
@Override
public Class getColumnClass(int column) {
return getValueAt(0, column).getClass();
}
};
table.setDefaultRenderer(Date.class, new DefaultTableCellRenderer() {
@Override
protected void setValue(Object value) {
setText((value == null) ? "" : df.format(value));
}
});
table.setPreferredScrollableViewportSize(new Dimension(200, 100));
JScrollPane scrollPane = new JScrollPane(table);
add(scrollPane, BorderLayout.CENTER);
timer = new Timer(delay, startCycle());
timer.setRepeats(true);
timer.start();
}
private Action startCycle() {
return new AbstractAction(MyTask.STARTSCHEDULE) {
@Override
public void actionPerformed(ActionEvent e) {
executor.execute(new MyTask(MyTask.STARTSCHEDULE));
}
};
}
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
TableWithExecutor frame = new TableWithExecutor();
frame.setDefaultCloseOperation(EXIT_ON_CLOSE);
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
private class MyTask extends SwingWorker<List<DateRecord>, DateRecord> {
private static final String STARTSCHEDULE = "StartSchedule";
private String name = STARTSCHEDULE;
MyTask(String name) {
this.name = name;
addPropertyChangeListener(new TaskListener(name));
}
@Override
protected List<DateRecord> doInBackground() throws Exception {
for (int row = 0; row < model.getRowCount(); row++) {
Date date = new Date();
date.setTime(date.getTime() + row * 1000);
publish(new DateRecord(row, date));
}
return null;
}
@Override
protected void process(List<DateRecord> chunks) {
for (DateRecord dr : chunks) {
model.setValueAt(dr.date, dr.rowNumber, 1);
}
}
@Override
protected void done() {
try {
get();
} catch (Exception e) {
e.printStackTrace(System.err);
}
}
}
private static class DateRecord {
private int rowNumber;
private Date date;
public DateRecord(int recordNumber, Date date) {
this.rowNumber = recordNumber;
this.date = date;
}
}
private static class TaskListener implements PropertyChangeListener {
private String name;
TaskListener(String name) {
this.name = name;
}
@Override
public void propertyChange(PropertyChangeEvent e) {
System.out.println(name + ": "
+ e.getOldValue() + " -> " + e.getNewValue());
}
}
}