Difference Between
versus

Static in Java vs. Final in Java: Know the Difference

Shumaila Saeed
By Shumaila Saeed || Published on February 3, 2024
In Java, 'static' refers to a class-level member shared by all instances, while 'final' denotes a constant or an unchangeable reference.
Static in Java vs. Final in Java

Key Differences

In Java, 'static' is a keyword used to indicate that a variable or method belongs to the class itself, rather than to any specific instance. On the other hand, 'final' is used to declare constants or to prevent method overriding or inheritance of classes.
Shumaila Saeed
Shumaila Saeed
Feb 03, 2024
Static members are initialized only once, at the start of the execution and shared by all instances of the class, conserving memory. Conversely, final variables, once assigned a value, cannot be reinitialized; final methods cannot be overridden; and final classes cannot be subclassed.
Shumaila Saeed
Shumaila Saeed
Feb 03, 2024
Static methods can be called without creating an instance of the class, primarily used for utility or helper methods. Final keywords, when applied to methods, ensure they keep their implementation in the entire hierarchy, protecting the method's behavior.
Shumaila Saeed
Shumaila Saeed
Feb 03, 2024
Static variables can maintain a common state shared across all instances of the class. In contrast, final variables are often used to create immutable objects or constant values that should not change once initialized.
Shumaila Saeed
Shumaila Saeed
Feb 03, 2024
In Java, static blocks can be used for static initializations, executed when the class is loaded. Final, however, has no such concept but ensures that once a final variable is assigned or a final method is defined, it remains constant or unchanged.
Shumaila Saeed
Shumaila Saeed
Feb 03, 2024
ADVERTISEMENT

Comparison Chart

Scope

Belongs to the class, not instances
Implies immutability or prevention of change
Shumaila Saeed
Shumaila Saeed
Feb 03, 2024

Usage

For shared class variables/methods
For constants, immutable objects, finalizing methods or classes
Shumaila Saeed
Shumaila Saeed
Feb 03, 2024

Initialization

Initialized once, at class loading
Assigned once, cannot be reinitialized
Shumaila Saeed
Shumaila Saeed
Feb 03, 2024

Method Implication

Can be called without an instance
Cannot be overridden
Shumaila Saeed
Shumaila Saeed
Feb 03, 2024

Class Implication

No direct implication on class inheritance
Prevents the class from being subclassed
Shumaila Saeed
Shumaila Saeed
Feb 03, 2024
ADVERTISEMENT

Static in Java and Final in Java Definitions

Static in Java

Static methods can be called without an object instance.
Use Math.PI to access the static constant PI in the Math class.
Shumaila Saeed
Shumaila Saeed
Jan 24, 2024

Final in Java

Final variables can be assigned only once.
Once assigned, the final variable MIN_BALANCE cannot be reassigned.
Shumaila Saeed
Shumaila Saeed
Jan 24, 2024

Static in Java

Static members are part of the class, not individual objects.
The static method calculateInterest is called without creating an object.
Shumaila Saeed
Shumaila Saeed
Jan 24, 2024

Final in Java

Final in Java is used to create constants.
The final variable MAX_SIZE is set to 100 and cannot be changed.
Shumaila Saeed
Shumaila Saeed
Jan 24, 2024

Static in Java

Static in Java means a member belongs to the class rather than instances.
The static variable employeeCount tracks the number of employees.
Shumaila Saeed
Shumaila Saeed
Jan 24, 2024
ADVERTISEMENT

Final in Java

Final methods cannot be overridden by subclasses.
The final method displayDetails() cannot be overridden in any subclass.
Shumaila Saeed
Shumaila Saeed
Jan 24, 2024

Static in Java

Static blocks are used for static initialization in a class.
The static block initializes shared resources when the class is loaded.
Shumaila Saeed
Shumaila Saeed
Jan 24, 2024

Final in Java

Final ensures immutability of the reference.
The final List reference myList cannot be pointed to another list.
Shumaila Saeed
Shumaila Saeed
Jan 24, 2024

Static in Java

Static variables are shared by all instances of the class.
All instances of the class share the same static configuration settings.
Shumaila Saeed
Shumaila Saeed
Jan 24, 2024

Final in Java

Final classes cannot be extended.
The final class ImmutablePoint cannot be subclassed.
Shumaila Saeed
Shumaila Saeed
Jan 24, 2024

Repeatedly Asked Queries

Can final variables be static?

Yes, final variables can be static, making them class constants that cannot be changed.
Shumaila Saeed
Shumaila Saeed
Feb 03, 2024

What does final mean in Java?

Final in Java designates immutability, indicating that a variable cannot be re-assigned, a method cannot be overridden, or a class cannot be subclassed.
Shumaila Saeed
Shumaila Saeed
Feb 03, 2024

What does static mean in Java?

Static in Java indicates that a member (variable, method, block) belongs to the class itself rather than to a specific instance.
Shumaila Saeed
Shumaila Saeed
Feb 03, 2024

Can static methods use instance variables?

No, static methods cannot directly access instance variables as they belong to the class, not an instance.
Shumaila Saeed
Shumaila Saeed
Feb 03, 2024

Do static members get serialized?

No, static members do not get serialized as they are part of the class, not the object state.
Shumaila Saeed
Shumaila Saeed
Feb 03, 2024

How is memory allocation different for static and final?

Static variables are allocated once in class space when the class is loaded, while final variables are assigned once per instance or once in the class if static.
Shumaila Saeed
Shumaila Saeed
Feb 03, 2024

Can a final class have static methods?

Yes, a final class can have static methods.
Shumaila Saeed
Shumaila Saeed
Feb 03, 2024

Is it mandatory to initialize a static variable when it's declared?

No, it's not mandatory to initialize a static variable at the point of declaration; it can be initialized later in a static block or static method.
Shumaila Saeed
Shumaila Saeed
Feb 03, 2024

Can we override a static method?

No, static methods cannot be overridden as they are not dispatched on the instance but the class.
Shumaila Saeed
Shumaila Saeed
Feb 03, 2024

Can static methods be final?

Yes, static methods can be final, preventing them from being hidden by subclasses.
Shumaila Saeed
Shumaila Saeed
Feb 03, 2024

What happens if a final variable is not initialized?

A compile-time error occurs if a final variable is not initialized at the time of declaration or in the constructor.
Shumaila Saeed
Shumaila Saeed
Feb 03, 2024

Why use static variables in Java?

Static variables are used to maintain a common value shared across all instances of a class, like a counter or configuration setting.
Shumaila Saeed
Shumaila Saeed
Feb 03, 2024

Why use final in Java?

Final is used to enforce immutability and to protect methods and classes from being altered in subclasses, enhancing security and design clarity.
Shumaila Saeed
Shumaila Saeed
Feb 03, 2024

Are static final variables common in Java?

Yes, static final variables are common, especially for defining constants like public static final int MAX_SIZE = 100;.
Shumaila Saeed
Shumaila Saeed
Feb 03, 2024

How is a static variable different from a regular instance variable?

A static variable is shared among all instances of the class, while an instance variable has its own value in each object instance.
Shumaila Saeed
Shumaila Saeed
Feb 03, 2024

Can a constructor be static or final in Java?

No, constructors in Java cannot be static or final.
Shumaila Saeed
Shumaila Saeed
Feb 03, 2024

What is a static final variable in Java?

A static final variable in Java is a constant at the class level, shared by all instances and unchangeable after its initial assignment.
Shumaila Saeed
Shumaila Saeed
Feb 03, 2024

Can a final method be inherited?

Yes, a final method can be inherited but cannot be overridden in the subclass.
Shumaila Saeed
Shumaila Saeed
Feb 03, 2024

Can we initialize a final variable later?

A final instance variable must be initialized at the time of declaration or in the constructor, but not later.
Shumaila Saeed
Shumaila Saeed
Feb 03, 2024

Can we change the value of a static final variable?

No, a static final variable is a constant and cannot be changed once initialized.
Shumaila Saeed
Shumaila Saeed
Feb 03, 2024

Share this page

Link for your blog / website
HTML
Link to share via messenger
About Author
Shumaila Saeed
Written by
Shumaila Saeed
Shumaila Saeed, an expert content creator with 6 years of experience, specializes in distilling complex topics into easily digestible comparisons, shining a light on the nuances that both inform and educate readers with clarity and accuracy.

Popular Comparisons

Trending Comparisons

FPTP vs. PRFPTP vs. PR
Shumaila SaeedShumaila Saeed
February 16, 2024
FPTP (First Past the Post) is a simple plurality voting system where the candidate with most votes wins; PR (Proportional Representation) allocates seats based on the proportion of votes each party receives.
Poster vs. InfographicPoster vs. Infographic
Shumaila SaeedShumaila Saeed
December 25, 2023
A Poster is a large printed image or notice for public display, while an Infographic is a visual representation of information or data.
Japanese Eyes vs. Chinese EyesJapanese Eyes vs. Chinese Eyes
Shumaila SaeedShumaila Saeed
December 25, 2023
Japanese Eyes and Chinese Eyes refer to linguistic structures in Japanese and Chinese respectively, each reflecting unique aspects of grammar and syntax.
2 Pole Motors vs. 4 Pole Motors2 Pole Motors vs. 4 Pole Motors
Shumaila SaeedShumaila Saeed
December 25, 2023
2 Pole Motors have one pair of magnetic poles and run at higher speeds, while 4 Pole Motors have two pairs of poles and operate at lower speeds, offering higher torque.
Login vs. LogonLogin vs. Logon
Shumaila SaeedShumaila Saeed
December 25, 2023
"Login" and "Logon" are often used interchangeably to describe the process of gaining access to a computer system, but "login" can also refer to the credentials used for access.
Pulley vs. SheavePulley vs. Sheave
Hifza NasirHifza Nasir
April 4, 2024
A pulley is a wheel on an axle designed to support movement and change of direction of a taut cable, while a sheave is the wheel part of a pulley system that specifically interacts with the cable.
Poem vs. PoetryPoem vs. Poetry
Shumaila SaeedShumaila Saeed
December 25, 2023
A poem is a piece of writing that expresses ideas and emotions with a distinctive style and rhythm; poetry is the art form of writing such pieces.
Extent vs. ScopeExtent vs. Scope
Shumaila SaeedShumaila Saeed
December 25, 2023
"Extent" refers to the degree or range something covers, while "Scope" relates to the breadth or range of coverage, influence, or effect.
Nuclear Family vs. Joint FamilyNuclear Family vs. Joint Family
Shumaila SaeedShumaila Saeed
January 9, 2024
Nuclear Family is a family unit consisting of parents and their children. Joint Family is a larger family structure comprising parents, children, and other relatives living together.
NM3 vs. M3NM3 vs. M3
Hifza NasirHifza Nasir
April 19, 2024
NM3 measures gas volume under Normal conditions (0°C and 1.01325 bar), while M3 measures volume under the conditions at which it is measured, without standard adjustment.
Vital Proteins Collagen vs. OrganikaVital Proteins Collagen vs. Organika
Shumaila SaeedShumaila Saeed
February 9, 2024
Vital Proteins Collagen is a brand offering collagen supplements for health and beauty, while Organika is a broader health and wellness brand with diverse products including collagen.
Data Roaming vs. Cellular DataData Roaming vs. Cellular Data
Shumaila SaeedShumaila Saeed
December 25, 2023
Data Roaming allows usage of mobile network services outside of the home network area, while Cellular Data is using mobile services within the home network.
Slazenger Logo vs. Puma LogoSlazenger Logo vs. Puma Logo
Shumaila SaeedShumaila Saeed
February 15, 2024
The Slazenger logo features a panther, symbolizing agility and tradition, while the Puma logo depicts a leaping puma, representing speed and strength.
Gorilla Glass 3 vs. Gorilla Glass 5Gorilla Glass 3 vs. Gorilla Glass 5
Shumaila SaeedShumaila Saeed
January 1, 2024
Gorilla Glass 3 offers improved scratch resistance and durability compared to its predecessors, while Gorilla Glass 5 focuses on enhanced drop protection and toughness.
Pycharm Community vs. Pycharm ProPycharm Community vs. Pycharm Pro
Shumaila SaeedShumaila Saeed
February 4, 2024
PyCharm Community is a free, open-source IDE for Python development, while PyCharm Pro is a paid version with additional advanced features like web development support and database tools.
Catapult vs. TrebuchetCatapult vs. Trebuchet
Shumaila SaeedShumaila Saeed
January 4, 2024
A catapult is a ballistic device using tension or torsion to launch projectiles, while a trebuchet is a type of catapult using a counterweight for greater force and distance.
Fluid vs. LiquidFluid vs. Liquid
Shumaila SaeedShumaila Saeed
February 13, 2024
Fluids encompass all substances that flow (including gases and liquids), while liquids specifically refer to fluids with a definite volume but no fixed shape, adapting to their container.
DDR3 vs. DDR3LDDR3 vs. DDR3L
Shumaila SaeedShumaila Saeed
January 29, 2024
DDR3 is a type of RAM with standard voltage (1.5V), while DDR3L is a low voltage variant (1.35V) compatible with both 1.5V and 1.35V slots.
5'11" vs. 6'0"5’11” vs. 6’0″
Shumaila SaeedShumaila Saeed
February 4, 2024
The difference between 5'11" and 6'0" is one inch, with 5'11" being 71 inches and 6'0" being 72 inches tall.
NDM vs. FTPNDM vs. FTP
Shumaila SaeedShumaila Saeed
February 15, 2024
NDM (Network Data Mover) automates and secures data transfers across networks, while FTP (File Transfer Protocol) is a standard network protocol for transferring files between computers.
Crane vs. HeronCrane vs. Heron
Shumaila SaeedShumaila Saeed
June 24, 2024
Cranes are large, long-legged and long-necked birds known for their elaborate dances, while herons are typically more solitary, stealth hunters with a distinctive S-shaped neck.
Pebble vs. StonePebble vs. Stone
Dua FatimaDua Fatima
May 30, 2024
A pebble is a small, smooth rock worn by water or weather, typically found on beaches or rivers, while a stone is a larger, more varied rock that can be rough or smooth, used in construction or as a tool.
Explain vs. DefineExplain vs. Define
Dua FatimaDua Fatima
June 22, 2024
Explaining involves detailing or clarifying a concept, often including context and examples, whereas defining means stating the exact meaning of a word or phrase, typically in a concise manner.
Traditional Trade vs. Modern TradeTraditional Trade vs. Modern Trade
Shumaila SaeedShumaila Saeed
December 25, 2023
Traditional trade involves local, small-scale, often personalized commerce; modern trade is characterized by large-scale, technology-driven, and impersonal retail environments.

Featured Comparisons

New Comparisons