Similarities and differences sleep () and wait () of

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The same point: Once method execution, you can make the current process to enter the blocked state

Similarities and differences: 1. Statement sleep position different from the two methods declared in the thread class, wait object class declaration in
a different call of claim 2, sleep can be called at any desired scene, wait to be called in the synchronization code block
3 With regard to synchronization monitor whether the release: If two sync methods are called in the code block, sleep is not released, wait release.