This memory gets destroyed when the JVM exits.Ģ. It translates the bytecodes into computer language. Java Virtual Machine (JVM): You can understand JVM as an engine or a program that provides a runtime environment for Java bytecodes. There are two main components of memory management in Java:ġ. This job is done by garbage collector, a mechanism that enables automatic memory management in Java. One of the greatest advantages of using the Java programming language is that the programmers do not need to stress about memory management. In memory management, the unused objects are removed and space is created for new Java objects. In simple words, memory management in Java is the process of allocating memory space to new Java objects. This process is called memory management. Therefore, we have to clean the heap space and provide memory for new objects. The heap space gets filled as new Java objects are created, and more memory is required for new objects. Last is the permanent generation, where the metadata for runtime classes and application methods is stored. When the timeline gets over, the objects are moved to the old generation. The objects in the young generation have a timeline. The Young generation heap space is the place that stores new objects. The heap space is further divided into several generations. The program uses heap space throughout the period during which the application runs. The Java virtual machine (JVM) creates the heap space. Heap memory is the area in which all Java objects reside. When we end the method, the block created in the stack memory becomes unoccupied.

The stack memory creates a new block when we invoke a method. It is based on the Last-in-first-out order, commonly called the LIFO order. The stack memory contains short-lived, method-specific values. It is created for static memory allocation before executing a thread. Stack memory is the physical space or the RAM assigned to various Java objects during the run time. There are two types of memory in Java – stack memory and heap memory. In programming languages, memory refers to the spaces that store values, instructions or data. What is the Structure of Memory in Java and Memory Management?īefore you understand memory management in Java, let us recollect the basics of the Java memory structure.

Variable stored java stack vs heap