Collections and Concurrency - JavaFX 8: A Definitive Guide to Building Desktop, Mobile, and Embedded Java Clients - page 296

This is a pretty minimal JavaFX GUI application. Before letting you run this program, we point out several
features of the program. First of all, make a mental note of the main() method:

public static void main(String[] args) {
launch(args);
}

You have seen this method several times already. This stylized main() method always appears in a class that
extends the javafx.application.Application class. There is an overloaded version of the Application.launch()
method that takes a Class object as the first parameter that can be called from other classes:

launch(Class<? Extends Application> appClass, String[] args)

Therefore you can move the main() method to another class:

public class Main {
public static void main(String[] args) {
Application.launch(JavaFXThreadsExample.class, args);
}
}

to achieve the same result.
Next, notice that the nested class Model builds up its data model, which consists of a list of all live threads and the
stack traces of each thread, in its update() method:

public void update() {
threadNames.clear();
stackTraces.clear();
final Map<Thread, StackTraceElement[]> map = Thread.getAllStackTraces();
for (Map.Entry<Thread, StackTraceElement[]> entry : map.entrySet()) {
threadNames.add("\"" + entry.getKey().getName() + "\"");
stackTraces.add(formatStackTrace(entry.getValue()));
}
}

This method is called once in the constructor of Model , which is called from the constructor of the
JavaFXThreadsExample , and once from the event handler of the Update button.
When we run the program in Listing 7-7, the GUI in Figure 7-5 is displayed on the screen. You can explore the
threads in this JavaFX program by clicking on each thread name in the list and seeing the stack trace for that thread in
the text area. Here are some interesting observations:

main ” thread's call stack includes a call to com.sun.javafx.application.LauncherImpl.
launchApplication() .

• The “

JavaFX-Launcher ” thread's call stack includes a call to com.sun.javafx.application.
PlatformImpl.runAndWait() . This puts code, including the invocation of the constructor, on
the JavaFX Application Thread.

• The “

JavaFX Application Thread ” thread's call stack includes the native method com.sun.
glass.ui.win.WinApplication._runLoop() on a Windows box, and something similar on
Mac or Linux boxes.

• The “

QuantumRenderer-0 ” thread's call stack includes the method
com.sun.javafx.tk.quantum.QuantumRenderer$PipelineRunnable.run() .

• The “