Overriding the default heap size of 64mb

I run the java program on my pc on windows xp
I need to increase the heap size, currently I launch the jar file using a batch file, the contents of the batch file are:
java -Xms64m -Xmx512m -jar Lines.jar
I have set the min and max heap size and when I click on the .bat file it launches the jar file with tose heap settings
But I do not want to launch the jar file in this way(I don't want to use a batch file), is there anyway to override the default heap size for the java program to 512mb so that every time I launch the jar file the heap size is 512mb??
Edited by: muddy777 on Sep 23, 2009 6:30 PM

Vikash.SunJava wrote:
set this in some machine startup like a scheduled task at machine startup
java -Xms64m -Xmx512m
This this will be default JVM settings.Huh?

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