Scala vs Java: A detailed comparison between both Scala and Java

Here in this blog, CodeAvail experts will explain to you about Scala vs Java in detail.

Scala vs Java

Scala and Java names look common to so many people, what separates them?. Both Java and Scala have their own features. Java is a general-purpose computer programming language that is object-oriented, class-based, concurrent, etc. Java applications select to bytecode that can run on each Java virtual machine (JVM) despite computer architecture.

Scala is a multi-paradigm, high-level, general-purpose programming language. It is a pure object-oriented programming language. For example, that also gives support to the functional programming approach.

Also, there is no idea of primitive data as in Scala everything is an object. It is created to show the general programming models in a type-safe, succinct, and refine way. Likewise, In this blog, we have given in detailed difference on Scala vs Java.

What is Scala?

It is a statically typed programming language that includes object-oriented and functional programming. Also, it essentially targets the Java Virtual Machine platform but it applies to write various platforms software. However, it incorporates native platforms using Javascript and Scala-Native runtimes through Scala.

Features of Scala

Here are the essential Scala features:

  • Scala is statically typed
  • Scala is object-oriented. But also it is a functional language.
  • Enables you to execute Java code
  • It is a short, strong language. And can immediately grow according to the user’s demand.

What is Java?

Java is a computer programming language utilizes for general purposes and is object-oriented, concurrent, and class-based. By James Gosling it was developed in 1995 at Sun Microsystems, the organization later received by Oracle in 2009. The language is made so that developers can run it on all platforms that support Java without requiring to be recompiled.

Some features of Java

Some of the essential Java features are:

  • Java is highly Robust and Very Secure
  • It describes an instance of a class like encapsulation, abstraction inheritance, polymorphism.
  • In this case, it writes code only once and runs it on almost every computer platform
  • It is created for developing object-oriented applications.
  • Java is easy to understand Language. It has no complication in its features like an inheritance, pointer, operator overloading, etc.
  • Java is a multithreaded language with automated memory management.

Significant differences Java vs Scala

  • The variables of Scala are by default immutable type on the other hand variables of Java are by default mutable type.
  • Java is a network-centric, multi-platform, programming language. Whereas Scala is a static type programming language.
  • Scala does not include static members. While Java includes static members.
  • However, it does not give backward compatibility. But Java does give backward compatibility.
  • Scala helps lazy evaluation. On the other hand, Java does not support lazy evaluation.
  • The actor model uses in Scala for maintaining modern concurrency. Whereas for concurrency, Java uses the conventional thread-based model.
  • Frameworks Scala are Lift and Play. On the other hand, Java frameworks are Grails, Spring, and many more.
  • Scala promotes operator overloading. But Java does not support operator overloading.
  • Because of the nested code, Scala is less readable whereas Java is more readable.

Scala vs Java comparison table

Supported frameworksSupports frameworks – Lift, PlaySupports Grails, Spring, much more
Support for Various inheritancesSupports various inheritances by using classes but not by abstract classesAccordingly, Does not support various inheritances by using classes, but by interfaces
CompactnessGenerally, more concise and compactComparatively bigger parts of code
Lazy evaluation supportLikewise, it Supports lazy evaluationThus, it does not support lazy evaluation
Designed forIt is created and produced to be both functional and object-oriented language. It supports an extensive type of functional programming features such as Immutability and concurrency.Basically produced as an object-oriented language and started helping features of functional programming in current days. For example, it is not as effective as a functional programming language.
InterfacesTraits – function like Java 8 interfacesJava 8 interfaces try to connect the gap between interfaces and objects 
Concurrency modelFor supporting modern concurrency it uses the actor modelFor concurrency, it uses the conventional thread-based model.
URL rewritingThere is need for rewritingAccordingly, Rewriting is not required
Static membersNo static membersGenerally, Includes static members
The static keywordIt does not include the static keyword.Java includes the static keyword.
Readability Because of its nested code, Scala is less readable.However, Java is more readable.
Operator overloadingAlso supports operator overloadingDo not support operator overloading
Bug-free codesNo certainty about the bug-free codes Likewise, Complete insurance of lesser defects
Code styleIn Scala code is written in a short form.The code is written in long-form.
Compilation processTherefore source code compilation is relatively slowSource code compilation is faster than Scala
Process Compiling The process of source code compiled into byte code is very late. Accordingly, the process of source code compiled into byte code is quick.
Guide for backward compatibilityScala does not help backward compatibilityLikewise, Java helps backward compatibility
Variables typesVariables of Scala are by default immutable type.But variables of Java are by default mutable type.
Treats Any function or method given in Scala is they are used like they are variable.Java uses functions as an object.
Calling methodEvery operation in Scala on entities implemented using method calls. Likewise, In Java Operators are managed separately and it is not done using the call method.


In this case, Scala is a pure object-oriented programming language. By the way, that also gives support to the functional programming approach. There is no idea of primitive data as in Scala everything is an object. Therefore, it creates to show the general programming models in a type-safe, succinct, and refined way. However, Java allows the developers to run the identical code on different platforms.

So, applications on the basis of Java normally compile to bytecode. In conclusion, we have given all the essential pieces of information regarding Scala vs Java difference and comparison. Also, we have given the features of both the programming languages for your better understanding.

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