package threadbook.ch09;

import java.awt.*;

import javax.swing.*;

public class InvokeLaterDemo 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("InvokeLaterDemo");

f.setContentPane(panel);

f.setSize(300, 100);

f.setVisible(true);

try {

print("sleeping for 3 seconds");

Thread.sleep(3000);

} catch ( InterruptedException ix ) {

print("interrupted while sleeping");

}

print("creating code block for event thread");

Runnable setTextRun = new Runnable() {

public void run() {

try {

Thread.sleep(100); // for emphasis

print("about to do setText()");

label.setText("New text!");

} catch ( Exception x ) {

x.printStackTrace();

}

}

};

print("about to invokeLater()");

SwingUtilities.invokeLater(setTextRun);

print("back from invokeLater()");

}

}