Right since Java originated, mobile app developers have been using it to develop Android apps. But few know that Android has officially adopted Kotlin as the supported language for mobile development services. But, in 2017 Google announced that Kotlin is the official programming language for Android app development. Since then, Kotlin vs Java has become a raging debate. Choose the best development platform based on your requirement.

1. Android Programming
Language
Recalling the times, when java originated and is widely
used for Mobile App Development. From almost two
decades, Java was the prime programming language to
build Android Apps, also ruling the Android world until the
introduction of Kotlin. At Google IO 2017, Kotlin announced
as the official programming language for Android app
development. Since then, Kotlin vs Java has become a
raging debate.
In Java, the extension functions are not available. To
extend the functionality of the present class,
developers need to create a new class and then
inherit the parent class.
In Kotlin, App Creator can easily extend the existing
class with all new functionality. To extend,
developers are able to create extend functionalities
by prefixing the name of a class to the name of a
specific new function.
KOTLIN JAVA
Kotlin vs Java
Extension Functions
Checked Exceptions
Data classes
In Kotlin to have a class that save data,
developers can declare a class with the
keyword ‘data’ in the class definition.
Afterwards, the compiler will finish the job such
as creating constructors, getter and setter
methods for numerous fields.
However, In Java to have the class that hold
data but nothing else, the developers need to
define constructors, variables to save data,
setter and getter methods.
Kotlin does not have any checked exceptions, so
developers do not need to catch or declare the
exceptions.
In Java, developers are able to declare and
catch the exception as it has checked
exception support. That’s why Java has robust
code with a good error handling capabilities.
Functional Programming
Kotlin is both the procedural and functional
programming language, consists of a number
of methods for developers including
operator overloading, lazy evaluation,
lambda, higher-order functions, etc.
Until Java 8, it was not having any functional
programming support. It supports the only
subset of Java 8 features while the mobile
app development.
what will it be? Kotlin or Java
Kotlin is an enhancement to Java, not a replacement. Obviously, some features are better in
Kotlin, while for other functionalities Java is advantageous to use. Also, there is another way
around for those, who do not want to ditch any of these two leading programming
languages. Both Java and Kotlin - programming languages are fully interoperable as well as
compile to bytecode. It means it is now possible to call Kotlin code from Java and vice-
versa.
There are two advantages of this flexibility, the foremost one is, and it facilitates getting
started with Kotlin by introducing the Kotlin code in Java project. And the other is, both
languages can be used simultaneously in any Android App Development project.
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