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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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Class Loader

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In this tutorial explain to What is Class Loader? Types of  Class Loader. Principle of  Class Loader. Class Loader hierarchy.      ClassLoader  The class loader concept, one of the cornerstones of the Java virtual machine , describes the behavior of converting a named class into the bits responsible for implementing that class. Because class loaders exist, the Java run time does not need to know anything about files and file systems when running Java programs. The  Java ClassLoader  is a part of the  Java Runtime Environment that dynamically loads Java classes into the  JavaVirtual Machine . The Java run time system does not need to know about files and file systems because of classloaders. Java classes aren’t loaded into memory all at once, but when required by an application. At this point, the  Java ClassLoader  is called by the  JRE  and these ClassLoaders load classes into memory dynamically. Types of C...
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