How I can set the Non-standard option of -Xmxn of jvm

Hi there,
Can any one tell me how I can set the Non-standard option of -Xmxn of jvm (setp by step).Iam using Sun's jvm(jdk1.2.2).Iam facing a error(java.lang .OutOfMemory).I want to set the maximum size of the memory allocation pool.Any help will be highly appreciated.
Thanks for ur valuable Time
Bikash

you can use the following sample options to specify memory size.
EX:java -Xms128mb -Xmx512mb myClassFile

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