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How can I find the number of cores available to my application from within Java code?
The java.lang.Runtime.availableProcessors() method returns the number of processors available to the Java virtual machine.This value may change during a Every Java application has a single instance of class Runtime that allows the application to interface with the environment in which the availableProcessors
int cores = Runtime.getRuntime().availableProcessors();
If cores is less than one, either your processor is about to die, or your JVM has a serious bug in it, or the universe is about to blow up.