JMap with JVM Debugging Disabled

Can I use jmap to create a java memory heap on a JVM which was started with debugging disabled? If 开发者_开发知识库so, how?

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To use jmap you just need a JVMID, which is the process identifier of the JVM you want to dump.

First use jps to get the JVMID. Then use jmap to dump the heap to a file.

Example:

jmap -dump:format=b,file=heap.bin <JVMID>

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(You know about visualvm and that it can connect to a running Java process? Requires Sun Java 6)