Java Training Course Explains The Concept Of Garbage Collector And Its Types

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There are lots of Java garbage collectors available and that is what this article over here is all about.
For more information join the Java training course to make your career in this field.

What is Garbage Collector?
An automation process in Java called as Garbage collection releases the object memory allocation and de-allocation chores from the programmer. Java memory is made efficient due to the removal of garbage collector and the unreferenced objects from heap memory.  A part of JVM or garbage collector is automatically executed and there is no requirement for any extra efforts.

There are four types of garbage collectors:

Serial Garbage Collector
Parallel Garbage Collector
CMS Garbage Collector
G1 Garbage Collector
1) SERIAL GARBAGE COLLECTOR
With the help of holding the application threads, the working of Serial garbage collector takes place.  For the single-threaded environments this design is used. For garbage collection just a single thread is used.  All the application threads are freezed and that is the way it works and is not suitable for server ...
... environments. It is the right choice for simple command-line programs.
2)PARALLEL GARBAGE COLLECTOR
A throughput collector is the alias name for parallel garbage collector. For the JVM it is the default garbage collector. There are multiple threads for garbage collection and it is used unlike the serial garbage collector. All the application threads are freezed and is the same as similar garbage collector while performing garbage collection.
3) CMS GARBAGE COLLECTOR
There are multiple threads used by the Concurrent Mark Sweep (CMS) garbage collector for scanning the heap memory and mark the instances for eviction and then clear the marked instances. There are lots of application threads held by the CMS garbage collector in the following two scenarios only:
In the tenured generation space mark the referenced objects.
While doing the garbage collection if the heap memory changes in parallel.
With parallel garbage collector comparison, more CPU is used by the CMS collector for ensuring better throughput application. If more CPU is allocated for better performance then the best choice is the CMS garbage collector over parallel collector.
4) G1 GARBAGE COLLECTOR
For large heap memory areas G1 garbage collector is used. It isolates the heap memory into regions and does collection inside them in parallel. For large heap memory areas G1 garbage collector is used. The heap space on the go is compacted with G1. The CMS garbage collector on the other hand compacts the memory on Stop The World situations. Based on various garbage first, G1 collector prioritizes the region. Join the Java training institute to make your career in this field.