Stack and Heap: Memory Management In Java (The most important Concept in Java)

From Java Code to Java Heap: Understanding the Memory Usage of Your Application:

Understanding JVM Memory Model, Java Memory Management are very important if you want to understand the working of Java Garbage Collection.

You might think that if you are programming in Java, what do you need to know about how memory works? Java has automatic memory management, a nice and quiet garbage collector that quietly works in the background to clean up the unused objects and free up some memory.

Therefore, you as a Java programmer do not need to bother yourself with problems like destroying objects, as they are not used anymore. However, even if this process is automatic in Java, it does not guarantee anything. By not knowing how the garbage collector and
Java memory is designed, you could have objects that are not eligible for garbage collecting, even if you are no longer using them.

So knowing how memory actually works in Java is important, as it gives you the advantage of writing high-performance and optimized applications that will never ever crash with an OutOfMemoryError.

On the other hand, when you find yourself in a bad situation, you will be able to quickly find the memory leak.

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