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I was wondering if anybody knew with any certainty whether ProcessBuilder/Runtime.exec() executes inside the space of the JVM’s memory or whether it uses completely separate system memory and somehow sends the output to Java. I could not find any documentation on the subject.
I assume it is the former due to security issues and being able to read output, but I would like to make absolutely sure.
The new process runs outside the Java process that started it. Allocation of memory to the new process is managed by the operating system, as part of process management.
The Java class
ProcessBuilder, which provides an interface for starting and communicating with the new process, runs inside the Java process.