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    <p>It depends on the implementation. </p> <p>If you use a <code>LinkedBlockingQueue</code>, the <code>take()</code> method checks with a <code>ReentrantLock</code></p> <pre><code>public E take() throws InterruptedException { E x; int c = -1; final AtomicInteger count = this.count; final ReentrantLock takeLock = this.takeLock; takeLock.lockInterruptibly(); ... } // declared as private final ReentrantLock takeLock = new ReentrantLock(); // no fairness argument, defaults to false </code></pre> <p>The <a href="http://docs.oracle.com/javase/7/docs/api/java/util/concurrent/locks/ReentrantLock.html" rel="nofollow">javadoc</a> says</p> <blockquote> <p>The constructor for this class accepts an optional fairness parameter. When set true, under contention, locks favor granting access to the longest-waiting thread. <strong>Otherwise this lock does not guarantee any particular access order</strong>. Programs using fair locks accessed by many threads may display lower overall throughput (i.e., are slower; often much slower) than those using the default setting, but have smaller variances in times to obtain locks and guarantee lack of starvation. Note however, that fairness of locks does not guarantee fairness of thread scheduling. Thus, one of many threads using a fair lock may obtain it multiple times in succession while other active threads are not progressing and not currently holding the lock. Also note that the untimed tryLock method does not honor the fairness setting. It will succeed if the lock is available even if other threads are waiting.</p> </blockquote>
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Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

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