Mega Code Archive
Eliminating race Conditions using Swing Components
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// : c14:InvokeLaterFrame.java
// Eliminating race Conditions using Swing Components.
// From 'Thinking in Java, 3rd ed.' (c) Bruce Eckel 2002
// www.BruceEckel.com. See copyright notice in CopyRight.txt.
import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import javax.swing.JFrame;
import javax.swing.JTextField;
import javax.swing.SwingUtilities;
public class InvokeLaterFrame extends JFrame {
private JTextField statusField = new JTextField("Initial Value");
public InvokeLaterFrame() {
Container cp = getContentPane();
cp.add(statusField, BorderLayout.NORTH);
addWindowListener(new WindowAdapter() {
public void windowOpened(WindowEvent e) {
try { // Simulate initialization overhead
Thread.sleep(2000);
} catch (InterruptedException ex) {
throw new RuntimeException(ex);
}
statusField.setText("Initialization complete");
}
});
}
public static void main(String[] args) {
final InvokeLaterFrame ilf = new InvokeLaterFrame();
run(ilf, 150, 60);
// Use invokeAndWait() to synchronize output to prompt:
// SwingUtilities.invokeAndWait(new Runnable() {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
ilf.statusField.setText("Application ready");
}
});
System.out.println("Done");
}
public static void run(JFrame frame, int width, int height) {
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(width, height);
frame.setVisible(true);
}
} ///:~
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