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Java Stack and Heap: Java Memory Allocation Lesson.

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    Stack Memory   Stack in java is a section of memory which contains methods, local variables, and reference variables. Local variables are created in the stack. Java Stack memory is used for the execution of a thread. They contain method-specific values that are short-lived and references to other objects in the heap that is getting referred from the method. Stack  memory is always referenced in  LIFO (Last-In-First-Out)  order. Whenever a method is invoked, a new block is created in the stack memory for the method to hold local primitive values and reference to other objects in the method. As soon as the method ends, the block becomes unused and becomes available for the next method. Stack memory size is very less compared to Heap memory. Key Features of Stack Memory Apart from what we have discussed so far, following are some other features of  Stack  memory: It grows and shrinks as new methods are called and returned respectiv...
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Java Memory Allocation.

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              Memory Management in Java  Memory allocation  is a process by which computer programs and services are assigned with physical or virtual  memory  space.  In Java, memory management is the process of allocation and de-allocation of objects, called Memory management. Java does memory management automatically. Java uses an automatic memory management system called a  garbage collector . Thus, we are not required to implement memory management logic in our application. Java memory management divides into two major parts: JVM Memory Structure Working of the Garbage Collector     Types of Memory areas allocated by the JVM:                      JVM creates various run time data areas in a heap. These areas are used during the program execution. The memory areas are destroyed when JVM exits, whereas the data areas are destroyed when ...
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Garbage Collection in Java How Java Garbage Collection Works?

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         Garbage Collection   In Java, the programmers don’t need to take care of destroying the objects that are out of use. The Garbage Collector takes care of it.   Garbage Collector is a Daemon thread that keeps running in the background. Basically, it frees up the heap memory by destroying the unreachable objects.           Unreachable objects are the ones that are no longer referenced by any part of the program.            We can choose the garbage collector for our java program through JVM options,       Garbage Collector is a program that manages memory automatically wherein de-allocation of objects is handled by Java rather than the programmer. In the Java programming language, dynamic allocation of objects is achieved using the  new  operator. An object once created uses some memory and the memory remains allocated till there are...
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