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Monitor

 
Ranch Hand
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Which is being considered as Monitor while discussing Thread subject. I am not getting a clear definition about it.
Thanks
 
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Think of a monitor like a lock. Every object has a monitor.
A thread can lock this monitor for an object and while the thread is in a critical section (synchronized block), other threads cannot acquire this lock.
 
Greenhorn
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monitor is something like a block for an object of thread which does not allow other threads to enter when synchronised
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V Srinivasan
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How come? Monitor is also an object.
 
Jim Baiter
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You can get the official definition by looking at the Java Language Specification, Chapter 17.
 
Greenhorn
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hello friend,
java uses MONITORS to perform Sysncronization. Every object with Synchronized method is a monitor and the monitor lets only one thread at a time execute a synchronized method on the object.
 
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Monitor is infact an Object that can block and allow a thread(s) to run.
For this purpose Monitor provides every Object a lock and this lock is controlled by atmost one Thread at a particular time.
And also putting synchronized keyword before a method decleration or a block just makes the lock of the object containing that code to be acquired by a single thread till that method(or synchronized block) is implemented by the thread that has got the lock.The thread gives up the lock after that.
 
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