How to determine main class at runtime in threaded java application?

Question

I want to determine the class name where my application started, the one with the main() method, at runtime, but I\'m in another thread and my stacktrace doesn\'t go all the

Answer 1

How about something like:

Map stackTraceMap = Thread.getAllStackTraces();
for (Thread t : stackTraceMap.keySet())
{
    if ("main".equals(t.getName()))
    {
        StackTraceElement[] mainStackTrace = stackTraceMap.get(t);
        for (StackTraceElement element : mainStackTrace)
        {
            System.out.println(element);
        }
    }
}

This will give you something like

java.lang.Object.wait(Native Method)
java.lang.Object.wait(Object.java:231)
java.lang.Thread.join(Thread.java:680)
com.mypackage.Runner.main(Runner.java:10)

The main thread is probably not guarenteed to be called "main" though - might be better to check for a stack trace element that contains (main

Edit if the main thread has exited, this is no good!