If you look at the code provided by @BrianTarbox the synchronized block is using some object other than "this" to lock. In theory there's no difference between a synchronized method and putting the entire body of said method inside a synchronized block, as long as the block uses "this" as lock. – xburgos.
One of the major differences between deadbolts and latches is that latch-based locks have doorknobs or door handles, while deadbolt locks do not. Latches vs. Deadbolts: Which One is Better? Each lock type carries certain advantages; for example, a latchbolt will lock automatically, while most deadbolts require manual locking.

The Yale Assure Lock 2 is a modest upgrade over its predecessor, the Yale Assure Lock SL. Both have the same subdued and stylish number pad, use the same easy-to-use app, and great integration

It is wrong, when you use spinlock, semaphore etc you are not putting the proccess to sleep. In spinlock case, it is dangerous if you sleep while you get a spinlock. Locking is necessary in order to avoid concurrent access. Let say that you are writing a printer driver. The driver receive the text form an application and it prints out the text

A lock screen is a screen on your computer that displays when you lock the screen. Start - click your User Name - then click "Lock" to see it. ----- A Screen Shot is an image you make of your screen using "Snipping Tool", "Snip & Sketch", or a 3rd party utility. Use Snipping Tool to capture screenshots . 91 87 262 306 271 231 15 238

difference between lock and padlock