Why doesn't this thread pool get garbage collected?

Question

In this code example, the ExecutorService is used one and allowed to go out of scope.

public static void main(String[] args)
{
    ExecutorService executorSe         


        

Answer 1

Because garbage collection is “non deterministic” ie you cannot predict when it will happen, you thus cannot predict exactly when the finalize method will run. You can only make Objects eligible for GC and suggest gc with System.gc() without any guarantee.

Even worse threads are OS specific handled by the JVM and are hardly predictable...