Is Scala Java based?

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Have you been wondering if Scala is purely or majorly Java-based? It’s fascinating to understand the correlation between Scala and Java. There are so many similar features in both Scala and Java displays. However, some distinctions are showing the disparities between the two programming languages.

Mainly, Scala is greatly influenced by the Java programming language. Even though you may hold convictions, it is proved that Scala was created to solve the problems Java displayed.

Just like Java, Scala is object-oriented and uses a curly-brace syntax reminiscent of the C programming language.

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Java being created earlier than Scala means that Scala language is based on Java language.

There is a possibility of Scala source code intended to be compiled to Java byte code so that the resulting executable code runs on a Java virtual machine.

Scala Test supports multiple testing styles and can integrate with Java-based testing frameworks.

Though Scala is Java-based, as claimed above, Scala’s development tools are still immature and still have limited community presence when compared to Java.  


Is Scala harder than Java

Is Scala the same as Java?

How do you get to know the relationship between Scala and Java programming languages? Close study and research reveal the similarities and differences that the two super programming languages uphold.

It is never true that Scala is the same as Java! Both the languages are independent of each other even though they display similar features in some cases. 

To be clear about this, you can find below why Scala is not the same as Java.

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At first, Scala is a statically typed programming language, whereas Java is a multi-platform, network-centric programming language. Scala majored in using an actor model to support modern concurrency, while Java majors apply the conventional thread-based model for coexistence.

In Scala, functions are variables, while in Java, functions are Java objects.

To run routine tasks, Java requires several code lines while Scala reduces it to brief, concise code; thus, it takes half the number of lines as Java.

Java language supports backward compatibility while Scala doesn’t.

Scala’s learning curve is steeper, and its syntax is more complex, while learning Java is much easier.

Scala owns a “lazy evaluation” feature that allows the programmer to defer time-consuming computations until they’re needed, using the keyword “lazy’’ whereas Java has no search option.

Scala supports operator overloading, and Java does not.

Scala brags of being less verbose as Java is much verbose. Furthermore, Scala doesn’t contain static members, whereas Java has static members.

Scala comes as being less readable because of its nested code, while Java is more readable.

Scala’s frameworks are Play, Lift, whereas Java’s frameworks are spring, Grails, etc.

Compiling source code into byte code is slow, while the process of compiling source code into byte code is fast.

Code is written in a compact form in the Scala language, while in Java, the code is written in long-form.

Scala treated everything as an instance of the class, and it is a more object-oriented language. In contrast, Java is less object-oriented due to the presence of primitives and statics.

Operations on Scala entities are done using method calls, while in Java, operators are treated differently and done without method calls.

Should I learn Scala or Java?

There is much of an impressive selection of programming languages to choose from. The only problem is when you’re unsure which language to go with due to the many choices. The best speeches are Java and Scala; let’s look at which is worth learning.

Depending on the skills a programmer wants to own, they will choose any of the two. Even though there are no constraints in learning a specific language, it could be much better to learn both languages.

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Those programmers who want a broader and more versatile skillset should take their time to learn Java, given its continued popularity.

There are specific professions that require a particular language, thus the need to find the correct language. But let’s take a closer look at specific professionals which of the two languages suits them;

 It would be best if you learned Java if you want a career in any of the following professionals:

  • Android development
  • Back-end development
  • Big data development
  • Embedded devices development
  • IT Manager
  • Junior programmer
  • Senior programmer
  • Systems programmer

While you should learn Scala if you are for these specializations:

  • Application Developer
  • Big Data Engineer
  • Data Scientist
  • IT consultant
  • Software Developer
  • Software Engineer
  • Spark Engineer

Each course requires program-specific language that will enable you to maneuver in the job market.

With competition, the intense organizations hire Java developers due to their unwavering hiring priorities.

Instead, you should learn Scala because of all the advantages Java gives you because of JVM, and you will get the same with Scala since Scala is also based on JVM.

Scala gives you more flexibility in writing DSLs than Java, and also writing concurrent programs in Scala is much simpler compared to Java. 

Can Scala replace Java?

It has been touted that Scala can replace Java since it first came out. Though it never came to live to the expectations, Java introduced some functional programming features like lambda and stream in Java 8. Scala still stands out to be the language to learn for Java developers.

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It is never clear if a time will ever come when Java will be out surfaced and let Scala operate.

In its own space, Java is present in the Web, Desktops apps, Servers, and these ecosystems evidence that Java is not worth being replaced.

It is much impossible because the initiative to move from Java to Scala will cost millions of dollars.

One rarer example is about the legacy codebase. Wall Street still has some pieces of Java codebase that are 10-15 years old. Intel, NASA, and other giants have their mission-critical codebases written in Java.

Java has also grown tremendously in all sections and has created a robust ecosystem of libraries built on top of it. For Scala to make such a vast and robust ecosystem, it will take years of collective effort.

Java also comes out as the standard programming language despite its shortcomings. It is extremely versatile used for web ,mobile ,desktop ,lot ,data science ,machine learning ,cloud computing ,numerical computing , video games ,etc.

It will be a hailstorm for programmers to start coding mobile applications in Scala since they will be having less documentation to refer to and very few built libraries to simplify their tasks.

Java is undergoing a rapid development cycle where each release incorporates more and more Scala features.

It clear to some extent that Scala is something very strange to Java and very different. Java is the way of life, and it has a vast industry to support since it is widely used on a variety of modern electronics and many devices. Thus it’s true to say that Java is a multi-platform and expansive cross-platform language.

It seems much of contradictions because some view it that Scala isn’t doing what it would need to do to replace Java which is to have a swift compiler, efficient libraries, good long-term stability, and code clarity.

The performance of Java code is more consistently easy to predict in routine situations. Indeed, a chunk of Scala’s semantics is not directly supported by JVM, and some of the more functional features are implemented with complex compiler tricks.

Why is Scala preferred over Java?

Have you ever asked yourself why Scala is gaining popularity despite Java being the foundational programming language?

It is more convincing that Scala is preferred over Java and even purported to be a better Java replacement.

The reason why Scala is preferred over Java is simply the advantages it upholds. Find below some of the theories that support the sentiment above:

  • Scala is easy to learn for object-oriented programmers since it offers first-class functions for users. 
  • Scala has an exact syntax, eliminating boilerplate code, and its programs are written require less code than those similar programs written in Java. Generally, Scala’s compels features promote better coding and offer a performance increase.
  • Scala allows compatibility and interoperability with Java giving developers leeway to leverage the advantages of JVM and keep Java libraries.

Scala introduces functional features like String comparison advancements, pattern matching, Mixins which incorporate functions. 

  • in-class definitions 
  • Scala also includes a full-featured API library that is not bloated. Scalable software is easier to code, test, debug and deploy when written in Scala. Scala can be utilized to program, well, anything if performance is not an issue. The language is versatile, allowing it to be used to develop desktop software, games, web apps, mobile solutions, and software as a service.
  • Highly Scalable solutions like Clout, LinkedIn, Amazon, Blizzard, Coursera, and Twitter use Scala.
  • Scala has an actor’s inherently safer model than Java’s mutable data + locks on Thread model. What a high-level language brings to the table is making code easier to read and understand, easier to compose, and catch more errors. Thus this makes the most difference precisely from the Java language.
  • Scala has no “blank final” fields or local variables as Java experiences such.
  • The fewer problems ideology which Scala uphold makes it easier to maintain Scala projects. 
  • Scala is logical and consistent and gives the impression that careful thought has gone into it. There is very little forehead-slapping than working with Java, where you are often presented with boneheaded language design decisions.
  • Scala is more type-safe thus refactor able than Java.
  • There is improvement in productivity due to the flexibility it owns 
  • Scala has REPL, which stands for reading, Evaluate, Print, and Loop. Thus, REPL as a shell allows you to do analysis. 
  • In Scala, Type information is exploited by optimizers to make decisions; therefore, the preferred choice for very high-performance systems.

Scala vs. Java code comparison

Hello there, Let us discuss some of the key differences between Scala and Java in the following points:

-Scala’s compilation from source code to byte code is slow, but in Java, collection happens faster

-In Scala, codes are shorter and written in compact form, while in Java, codes are written in long-form.

-Scala variables are immutable, which is set by default, while Java variables are mutable.

-Operators in Scala are treated using method calls while the method call system is never present in Java.

-Scala supports type interference, considering that it has a top-down approach, whereas Java does not support the same and further has a bottom-up approach.

-The syntax of Scala is simple, whereas Java has a complex syntax.

-Rewriting of code is not needed in Scala, while rewriting is required in Java.

Scala offers fewer defects and bug–free codes, whereas Java is not sure about bug-free codes, but it is easy to solve when the bug happens.

-The concurrency ability in Scala helps in parallelizing the tasks while Scala does not support concurrency.

-There are more third-party libraries in Scala, and most of them are from Java language though Java does not have third-party libraries and does not support Scala libraries.

-Scala has nested codes and is less readable, while Java is more readable.

-Lazy evaluation is supported in Scala, and hence it delays complex computation unless necessary, while Lazy evaluation is not supported and does not support analysis.

-Scala does not use static keywords, while Java uses static keywords.

-Operations on entities are treated similarly while operations on entities are treated differently.

-Scala is a machine-compiled language, while Java is an object-oriented language.

-Scala has solid tools and applications while the mechanisms of Java are not that strong, and APIs are less

-There is the possibility to do data analysis in Callusing Apache Spark, while Java is not much used for data analysis, and it does not integrate with Apache Spark.

-Garbage collection is well controlled and maintained in Scala with the idea that the garbage collector should be monitored closely to check the memory space. At the same time, Java cannot control the garbage collection.

-Hardware cost is less, security updates are not frequent, and first-class functions are offered in Scala while Hardware cost is more; first-class functions are not provided in Java since apps can be downloaded from any source, the software is not safe.

-Scala has a multi-core architecture while Java has CPU cores than that of Scala.

-Scala has many applications whereby developers do not know much about their compilation while Java’s collection is done faster.

-By using Scala, we can easily split up to 4 cores, while using Java, cores cannot be split up.

-Scala’s validation API is faster and is more customized, while validation API in Java is complex.

There are many differences between the Scala and Java codes.

Scala syntax

In the introduction, the Scala program is viewed as a collection of objects that invoke each other’s methods to communicate.

The basic Scala constructs are expressions, blocks, classes, objects, functions, traits, primary method, fields, and closures.

Let’s look at a detailed study of this basic structures of Scala syntax:

  1. Scala Expression                                                                                                                                                   

An expression is a computable statement, e.g., 1+2 is an expression. To be able to print the output of the expression, you need to use print1n()

  1. Scala Variables

Variable is a value that we can reassign. To declare a variable, you use the ‘var’ keyword. The Scala syntax for variables is as below.

Var x=2

X=3 //This changes the value of x from print1n(x*x)  

// this prints 9

You can declare the type of variable:

var roll:Int=30

  1. Scala Block

A block is a group of expressions delimited by curly braces ({}). A block returns whatever its last expression returns. The Scala syntax for a block is below:




Va1 x=1+1



) //3

  1. Scala Class

Scala class is a blueprint that we can use to create an object. It may hold values, variables, types, classes, functions, methods, objects, and traits, thus collectively called members.

So to declare a class, you use the keyword’ levels and an identifier.


        Class Fruit {}

        Val orange=new Fruit


  1. Scala Object

It is a single instance of its definition hence a singleton of its class.

To define an object, you use the keyword’ object.’

    Object Main extends App {

         Object My object {

                  def plusthree ( )={


val x=3*3


x=3 }


Print1n (Myobject .plusthree ) // This }

  1. Scala Function

A function is an expression that takes parameters. Let’s have a look at the anonymous function below

      (Xing )=>x*x

You give it a name 

   Val squared 

=( x:Int)=>x*x

To get the output, you call the function:

           Print1n(squared (3)) //This prints 9

Some functions may also take multiple parameters or none.

  1. Scala Method A method is somehow similar to a function but is defined using the keyword ‘def.’

What follows is an identifier, parameter lists, return type, and a body 

  1. Scala Trait

A trait holds fields and methods, and it is defined using the ‘trait’ keyword

By going through these syntaxes, you will be able to write a basic Scala code now

Scala language

What is Scala language? 

From the definitions, we find that Scala language is a general-purpose programming language and is an acronym from Scalable Language. It provides supports for both functional programming and object-oriented programming language.

The prime aim of Scala language is to improve Java language and call Java methods, inherit from Java classes, and more.

Scala is used for Strong static systems, machine learning, and data science! You can use Scala in content management systems, finance-related applications, and distributed applications.

Legible and compact code 

     -Solid Type System helps to eliminate errors and tells which algorithms to use on the data.

     -Java Interoperability, Scala interacts with Java and its libraries as part of the same system

      -Modern programming benefits help to carry out multiple calculations together. Include processes like asynchronous and parallel.

Scala is an expressive language since it is statically typed, clean syntax uses type differencing, and works with immutable values.

A single program in Scala includes thousands of variables. It requires objects, inheritance, classes of objects, and more. A single program also demands asynchronous processes, parallel processes, and interface-related processes in which you need to change data across boundaries.

It involves different screens, multiple views, and a wholesome of complexity. For instance, for hardware embedded software, you need a code as small as possible. For a web app, you need both something light and small to load in a browser. For slow machines, you need to optimize code for specific hardware.

The only reason behind complexity is to ensure the proper working of the software. 

The typing discipline in Scala is inferred, static, solid, and structural.

Scala has many functional programming languages like Scheme, Standard ML, and Haskell, including currying, immutability, lazy evolution, and pattern matching.

It also has an advanced type system supporting algebraic data types, covariance and contravariance, higher-order types, and anonymous types.

The name Scala is a portmanteau of Scalable and language, signifying that it is designed to grow with its users’ demands.

Luis Gillman
Luis Gillman

Hi, I Am Luis Gillman CA (SA), ACMA
I am a Chartered Accountant (SA) and CIMA (SA) and author of Due Diligence: A strategic and Financial Approach.

The book was published by Lexis Nexis on 2001. In 2010, I wrote the second edition. Much of this website is derived from these two books.

In addition I have published an article entitled the Link Between Due Diligence and Valautions.

Disclaimer: Whilst every effort has been made to ensure that the information published on this website is accurate, the author and owners of this website take no responsibility  for any loss or damage suffered as a result of relience upon the information contained therein.  Furthermore the bulk of the information is derived from information in 2018 and use therefore is at your on risk. In addition you should consult professional advice if required.