How to get vm arguments from inside of java application?

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I need to check if some option which can be passed to JVM is explicitly set or is it have default value. To be more specific: I need to create one specific thread with higher native stack size than the default one, but in case user want to take care of such things by himself by specifying -Xss option I want to create all threads with default stack size (which will be specified by user in -Xss option). I've checked classes like java.lang.System and java.lang.Runtime, but these aren't giving me information about vmargs. Is there any way to get information I need? java jvm jvm-arguments share|improve this question edited Nov 5 '12 at 12:47 Reddy 1,79541642 asked Sep 29 '09 at 6:22 Dmitriy Matveev 3,90141936

Next time you log in, could you switch the accepted answer? –  Erick Robertson Dec 5 '11 at 13:09

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With this code you can get the JVM arguments: import java.lang.management.ManagementFactory; import java.lang.management.RuntimeMXBean; ... RuntimeMXBean runtimeMxBean = ManagementFactory.getRuntimeMXBean(); List<String> arguments = runtimeMxBean.getInputArguments(); share|improve this answer edited Jul 11 at 14:19 Askin Geeks 2417 answered Oct 7 '09 at 14:32 David Schuler 62654

Sadly you cannot get the Name of the main class if it is given on the command line. –  Daniel May 20 '10 at 8:06 @Daniel, this should get you the name of the main class: final StackTraceElement[] stackTrace = Thread.currentThread().getStackTrace(); final String mainClassName = stackTrace[stackTrace.length - 1].getClassName()); –  laz Nov 16 '11 at 18:43 @laz System.getProperty("sun.java.command") is far simpler. –  Vulcan May 28 '12 at 6:19 1   If you are guaranteed to be running on Oracle's JVM and have the code to parse the arguments that can be useful. –  laz May 28 '12 at 12:57 @Vulcan That does not get VM arguments. It contains the main class name, and the args array to the main method. –  dacongy Sep 24 '12 at 2:10 show 1 more comments

up vote24down vote	At startup pass this -Dname=value and then in your code you should use value=System.getProperty("name"); to get that value share|improve this answer edited Oct 26 '12 at 11:53 om-nom-nom 23.5k65798 answered Nov 22 '10 at 15:34 Java_Freak 24922