The Java Developers Almanac 1.4


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Home > List of Packages > java.lang  [58 examples] > Threads  [11 examples]

e97. Determining If the Current Thread Is Holding a Synchronized Lock

A thread can determine if it is holding the synchronized lock of a particular object.
    public synchronized void myMethod() {
        boolean hasLock = false;
        Object o = new Object();
    
        // Determine if current thread has lock for o
        hasLock = Thread.holdsLock(o);     // false
        synchronized (o) {
            hasLock = Thread.holdsLock(o); // true
        }
    
        // Check if current thread has lock for current object
        hasLock = Thread.holdsLock(this);  // true
    }

 Related Examples
e92. Creating a Thread
e93. Stopping a Thread
e94. Determining When a Thread Has Finished
e95. Pausing the Current Thread
e96. Pausing a Thread
e98. Allowing an Application with Live Threads to Exit
e99. Listing All Running Threads
e100. Using a Thread-Local Variable
e101. Getting the Stack Trace of an Exception
e102. Implementing a Work Queue

See also: Arrays    Assertions    Classes    Commands    Numbers    Objects    Strings    System Properties   


© 2002 Addison-Wesley.