How to tell if program is launched from JAR?

Question

I have a program that needs to launch itself at some point in the program. The class is called CalcSolidsWindow.
The only problem is that I launch it from Eclipse to debug, and it's not in a JAR. However, I pack it into a JAR to distirbute it. To do so, I put this into the code:
if (runningInJar) {
    Runtime.getRuntime().exec("java -jar [...JAR name...] [...arguments...]"); //JAR launch
} else {
    Runtime.getRuntime().exec("java CalcSolidsWindow [...arguments...]"); //Non-JAR launch (mainly debug...)
}The problem is how to set the runningInJar vairable. I've tried:
File runFile = new File(CalcSolidsWindow.class.getProtectionDomain().getCodeSource().getLocation().getPath()).getCanoncialFile();
boolean runningInJar = runFile.getName().endsWith(".jar");However, that does not yield the correct result. After printing some stuff to the console, I realize that runFile is just the directory in which the program is running.
Is there a way to determine if a program was launched from a JAR or not? Thanks in advance for anyone's help!
Edited by: Vetruvet on Oct 22, 2009 10:25 AM

Answer 1

Vetruvet wrote:
I have a program that needs to launch itself at some point in the program. The class is called CalcSolidsWindow.
The only problem is that I launch it from Eclipse to debug, and it's not in a JAR. I am almost certain that Eclipse can do debugging for Jars, so why ever run it as loose class files?