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import java.awt.FlowLayout;
import java.lang.reflect.InvocationTargetException;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;
public class InvokeAndWaitDemo extends Object {
private static void print(String msg) {
String name = Thread.currentThread().getName();
System.out.println(name + ": " + msg);
}
public static void main(String[] args) {
final JLabel label = new JLabel("--------");
JPanel panel = new JPanel(new FlowLayout());
panel.add(label);
JFrame f = new JFrame("InvokeAndWaitDemo");
f.setContentPane(panel);
f.setSize(300, 100);
f.setVisible(true);
try {
print("sleeping for 3 seconds");
Thread.sleep(3000);
print("creating code block for event thread");
Runnable setTextRun = new Runnable() {
public void run() {
print("about to do setText()");
label.setText("New text!");
}
};
print("about to invokeAndWait()");
SwingUtilities.invokeAndWait(setTextRun);
print("back from invokeAndWait()");
} catch (InterruptedException ix) {
print("interrupted while waiting on invokeAndWait()");
} catch (InvocationTargetException x) {
print("exception thrown from run()");
}
}
}
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