Etwa so?
[code=Java]
import javax.swing.*;
public class Test {
public void run() {
JProgressBar bar = new JProgressBar();
JButton button = new JButton("...");
SwingWorker<Void,Void> worker = new SwingWorker<Void,Void>() {
@Override
public Void doInBackground() {
try {
for (int i = 0; i < 100; i++) {
Thread.sleep(100);
setProgress(i);
}
} catch (InterruptedException ex) {}
return null;
}
};
worker.addPropertyChangeListener(l ->
bar.setValue(worker.getProgress()));
button.addActionListener(e -> { worker.execute(); });
JPanel p = new JPanel();
p.add(bar);
p.add(button);
JOptionPane.showMessageDialog(null, p);
System.exit(0);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(() -> new Test().run());
}
}
[/code]
