System class.
finalize method.
You can force object finalization to occur by calling System's
runFinalization method.
System.runFinalization();
This method calls the finalize methods on all objects
that are waiting to be garbage collected.
System's
gc method:
System.gc();
You might want to run the garbage collector to ensure that it runs at
the best time for your program rather than when it's most convenient for
the runtime system to run it. For example, your program may wish to run
the garbage collector right before it enters a compute or memory intensive
section of code or when it knows there will be some idle time.
Note that the garbage collector requires time to complete its task.
The amount of time that gc requires to complete varies
depending on certain factors: How big your heap is and how fast your
processor is, for example. Your program should only run the garbage
collector when doing so will have no performance impact on your program.
For general information about Java's garbage collection scheme, see
Cleaning Up Unused ObjectstutorialIcon (in the Essential Java Classes trail)
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