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Whenever you produce AN object in Java it's hold on within the heap space of the JVM. If the JVM isn't able to portion memory for the new created objects AN exception named Out Of Memory Error is thrown.
This sometimes happens after we don't seem to be closing objects for while or, attempting to act immense quantity of information promptly.
There square measure three varieties of errors in Out Of Memory Error −
Java heap area.
GC Overhead limit exceeded.
This is AN example of poor programming, however the nice news is that the exception stack trace clearly points North American country to seem for the code wherever this error occurred. but typically the matter could be in another areas of the program, therein case we are going to want facilitate of java profilers like Visual VM to work out wherever most of the memory is being allotted and the way to optimize it.