Can you find whether thread holds lock on object or not?

Java Interview Questions and Answers (part 4)

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55. Can you find whether thread holds lock on object or not?

holdsLock(object) method can be used to find out whether current thread holds the lock on monitor of specified object.

holdsLock(object) method returns true if the current thread holds the lock on monitor of specified object.

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Other Interview Questions

• Differences and similarities between yield() and sleep() ?
• Output question 14.
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• How can you ensure all threads that started from main must end in order in which they started and also main should end in last?
• Suppose you have thread and it is in static synchronized method and now can thread enter other static synchronized method from that method?
• When threads are not lightweight process in java?
• What are thread priorities?
• Does thread leaves object lock when sleep() method is called?
• Suppose you have 2 threads (Thread-1 and Thread-2) on same object. Thread-1 is in synchronized method1(), can Thread-2 enter static synchronized method2() at same time?
• Output question 19.
• More...