A.It is possible for more than two threads to deadlock at once.
B.The JVM implementation guarantees that multiple threads cannot enter into a deadlocked state.
C.Deadlocked threads release once their sleep（） method’s sleep duration has expired.
D.Deadlocking can occur only when the wait（）， notify（）， and notifyAll（） methods are used incorrectly.
E.It is possible for a single-threaded application to deadlock if synchronized blocks are used incorrectly.
F.If a piece of code is capable of deadlocking， you cannot eliminate the possibility ofdeadlocking by insertinginvocations of Thread.yield（）.
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E.run.java.lang.RuntimeException： ProblemEnd of method
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