java - time since JVM started

Question

Is there a way to find out the time since the JVM started?

Of course, other than starting a timer somewhere near the beginning of main, because in my scenario I am writing library code and the requirement that something be called immediately after startup is a too burdensome.

Answer 1

Use this snippet:

long jvmUpTime = ManagementFactory.getRuntimeMXBean().getUptime();

or:

long jvmStartTime = ManagementFactory.getRuntimeMXBean().getStartTime();

This is the correct way of retrieving JVM up-time.

For more info see RuntimeMXBean