Monitors Review:

• A monitor is like an object with private data structures and some public methods.
• A monitor is a language construct.
• Only one process (or thread) at a time may be be active in a monitor.
• Condition variables have two methods: wait and signal (also called notify).
  • cv.wait() always blocks and releases the monitor.
    
  • cv.signal() wakes up a process waiting on cv, if any.
    That process still needs to wait to enter (become active in) the monitor.
• Each Java object has its own monitor and behaves as if the object implements condition variable.