The simple answer is the heap. Classes and all of the data applying to classes not instance data is stored in the Permanent Generation section of the heap. There is a thorough description of memory and garbage collection in the JVM as well as an answer that talks more concisely about it. PermGen Space is also known as Method Area. The static variables are stored in the Heap itself. From Java 8 onwards the PermGen Space have been removed and new space named as MetaSpace is introduced which is not the part of Heap any more unlike the previous Permgen Space.
Meta-Space is present on the native memory memory provided by the OS to a particular Application for its own usage and it now only stores the class meta-data. It is stored in the heap referenced by the class definition. If you think about it, it has nothing to do with stack because there is no scope.
In addition to the Thomas's answer , static variable are stored in non heap area which is called Method Area. As static variables are class level variables, they will store " permanent generation " of heap memory. Please look into this for more details of JVM. Hoping this will be helpful. In real world or project we have requirement in advance and needs to create variable and methods inside the class , On the basis of requirement we needs to decide whether we needs to create.
Static Keyword we will used with variable which going to same for particular class throughout for all objects, e. Anatoher example: utility method we always declare as static b'cos it will be used in different test cases. When we create a static variable or method it is stored in the special area on heap: PermGen Permanent Generation , where it lays down with all the data applying to classes non-instance data. Starting from Java 8 the PermGen became - Metaspace. The difference is that Metaspace is auto-growing space, while PermGen has a fixed Max size, and this space is shared among all of the instances.
You can look into this for more details. How are we doing? Please help us improve Stack Overflow. Take our short survey. Stack Overflow for Teams — Collaborate and share knowledge with a private group.
Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. Where are static methods and static variables stored in Java? Ask Question. Asked 9 years, 11 months ago. Active 10 months ago. Viewed k times. How are they stored? Improve this question. Shepmaster k 57 57 gold badges silver badges bronze badges. Nav Nav 9, 18 18 gold badges 53 53 silver badges 81 81 bronze badges. Add a comment. Active Oldest Votes. Update for clarification : Note that only the variables and their technical values primitives or references are stored in PermGen space.
A word on garbage collection: Do not rely on finalize as it's not guaranteed to run. Improve this answer. In every programming language, memory is a vital resource and is also scarce in nature. Allocation and deallocation of memory is a critical task and requires a lot of care and consideration.
In this article, we will understand the storage of static methods and static variables in Java. It converts the java byte code into machine language. The JVM has two primary functions. They are: Attention reader! Get hold of all the important Java Foundation and Collections concepts with the Fundamentals of Java and Java Collections Course at a student-friendly price and become industry ready.
It manages and optimizes program memory. The JVM memory manager creates memory pools during the runtime of the program. There are two types of memory pools namely the stack memory and the heap memory. The main difference between stack memory and the heap memory is that the stack is used to store only the small datatypes whereas heap stores all the instances of the class.
Active 6 years, 9 months ago. Viewed 26k times. Improve this question. Deepak Deepak 1 1 gold badge 1 1 silver badge 9 9 bronze badges. This question is already answered you can refer [here][1] [1]: stackoverflow. In heap or in stack memory — pgplus Add a comment. Active Oldest Votes. If you need elaborated answer , refer this static allocation in java - heap, stack and permanent generation.
Improve this answer. Community Bot 1 1 1 silver badge.
0コメント