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In method java.lang.Thread.start(), it will check the value of threadStatus before change the state of current thread from New to Runnable.
threadStatus is initialized as private volatile int threadStatus = 0; and I didn't find where this value is modified before start() method.

1.How the Annotation work? How we define the hierarchy of annotations?
2.How AspectJimplements aop by using annotations?
3.How IOCcreate prototype instances by using @scope("prototype")?

1. How JVM define a inner class?
2. What is the sequence of JVM loading outer class, inner class, static inner class?