Java

System.getProperty("servpath")

-DservPath=c:\test\test.jar

yogeshs wrote:

That is by mistake here in posting only not in my code.

File ff =new File(classname.class.getProtectionDomain().getCodeSource().getLocation().getPath());
String jarFilePath = ff.toString();

• If you can live with launching via a batch file, use javaw to set the -Xms and -Xmx values and run the jar using the -jar switch (this is possibly the most usual way to do it).
• If you really must have an executable jar file that you can double click to run, create a small Java program, all that does is to set up the javaw command line with the parameters you want to invoke your main jar, then execute that via Runtime exec (which would work but it's a bit of a hack)
• If you don't like that clunky approach, write a little launcher exe in some other language (C, Python, whatever). This is another common way to do things. (I believe this is how NetBeans does it, although I might be wrong there).
• Use one of the Java to exe tools (something like launch4j). I have never used any of these, so if you go down that route I cannot advise you which is best, or what the pitfalls are.