Java Tutorial

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Java Loops

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Java Programs

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Java Sorting

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Java OOPs Concepts

OOPs - Object Oriented Programming Objects and Classes in Java Java Naming Conventions Constructors in Java Java this keyword Java static keyword Inheritance in Java Aggregation in Java Java super keyword Constructor Chaining and Constructor Overloading Java Polymorphism Static and Dynamic Binding in Java Java Abstraction Abstract class in Java Interface in Java Difference between Abstract class and Interface Java final keyword Packages in Java Access Modifiers in Java Java Wrapper classes Java Numbers Java Characters Java Integer Java Boolean Java Arrays Java Command Line Arguments Java strictfp Keyword Java Math

Java Strings

Java Strings Java String Methods StringBuilder in Java StringBuffer in Java Java Regular Expressions StringBuffer vs StringBuilder String vs StringBuffer String vs StringBuilder String Manipulation in Java Java String Concatenation How to Reverse a String in Java String Array in Java How to Compare Two Strings in Java How to Concatenate Two Strings in Java Why String in Immutable in Java java.lang.NumberFormatException for Input String String Pool in Java Java Generate Random String How to take String Input in Java Java String Interview Questions

Java Exceptions

Exception Handling in Java Java try catch Java throw Java throws Difference between throw and throws Java finally Java Custom Exception Java Exception Propagation

Garbage Collection

Automatic Resource Management in Java Java Garbage Collection Java finalize() Java gc() Difference between final, finally and finalize


Multithreading in Java Process and Thread in Java Basic Terms in Multithreading Java Thread creation Thread Scheduler in Java Java Thread class DeadLock in Java

Java IO

Java IO Java Read File Java BufferedWriter Java InputStreamReader Java File Java Read File Line By Line Java FileOutputStream Jar File in Java


Java Serialization Java transient


Java Network Programming Java Socket Programming Java URL Java URLConnection HttpURLConnection in Java Java InetAddress Java DatagramSocket and Java DatagramPacket


Java AWT


Swing in Java

Java Collections

Collections in Java Java List Interface ArrayList in Java LinkedList in Java Vector in Java Stack in Java ArrayList vs LinkedList in Java ArrayList vs Vector in Java Java Set Interface HashSet in Java LinkedHashSet in Java TreeSet in Java Java Queue Interface PriorityQueue in Java ArrayDeque in Java Java Map Interface HashMap in Java LinkedHashMap in Java TreeMap in Java Dictionary in Java Hashtable in Java Properties in Java Collections class in Java Java Comparable Java Comparator Comparable vs Comparator in Java

Java Generics

Generics in Java

Java Annotations

Annotations in Java


Java JDBC Tutorial

Java Differences

Java vs JavaScript Python vs Java Kotlin vs Java Java vs C++ C# vs Java Static vs Non-static in Java C vs Java int vs Integer in Java Stack vs Heap in Java Java Array vs ArrayList

How to

How to run Java program How to set path in Java How to check the Java version in cmd How to install Java in Windows 10 How to run Java program in cmd How to call a method in Java How to sort an array in Java How to iterate HashMap in Java How to write Java program How to create an array in Java How to create a package in Java How to generate random numbers in Java How to input String in Java How to create thread in Java How to find length of String in Java How to sort a string in Java How to use scanner in Java How to achieve multiple inheritance in Java How to run Java program in Eclipse How to call a function in Java How to create array of objects in Java How to create custom exception in Java How to achieve abstraction in Java How to call static method in Java

Java 8 Features

Java 8 Features Lambda Expressions in Java Functional Interface in Java Streams in Java Java Base64 Encoding and Decoding Parallel Arrays Sort in Java

Java 9 Features

Java 9 Tutorial Java 9 Try With Resources Java 9 Interface Private Method

Java Servlet Tutorial

Java Servlets Tutorial

Java JSP Tutorial

Java JSP Tutorial

Hibernate Tutorial

Hibernate Tutorial

Spring Tutorial

Spring Tutorial

Spring MVC Tutorial

Spring MVC Tutorial

Jenkins Tutorial

Jenkins Tutorial

Java Math Methods

Math.abs() Math.acos() Math.addExact() Math.asin() Math.atan () Math.atan2() Math.cbrt() Math.ceil() Math.copysign() Math.cos() Math.cosh() Math.decrementExact() Math.exp() Math.expm1() Math.floor() Math.floorDiv() Math.floorMod() Math.getExponent() Math.hypot() Math.IEEEremainder() Math.incrementExact() Math.log() Math.log10() Math.log1p() Math.max() Math.min() Math.multiplyExact() Math.multiplyFull() Math.negateExact() Math.nextAfter() Math.nextDown() Math.nextUp() Math.pow() Math.random() Math.rint() Math.round() Math.scalb() Math.signum() Math.sin() Math.sinh() Math.sqrt() Math.subtractExact() Math.tan() Math.tanh() Math.toDegrees() Math.toIntExact() Math.toRadians() Math.ulp()

Java String Methods

toCharArray() copyValueOf() endsWith() equals() equalsIgnoreCase() format() getBytes() getChars() hashCode() indexOf() intern() isEmpty() join() lastIndexOf() length() replace() replaceAll() replaceFirst() split() startsWith() subSequence() substring() toLowerCase() toUpperCase() trim() valueOf()

Java Conversion

Java Convert String to int Java Convert int to String Java Convert String to long Java Convert long to String Java Convert String to float Java Convert float to String Java Convert String to double Java Convert double to String Java Convert String to Date Java Convert Date to String Java Convert String to Object Java Convert Object to String Java Convert String to char Java Convert char to String Java Convert int to long Java Convert long to int


Functional Interfaces in Java Singleton class in Java Awesome explanation of Strings in Java Object class in Java Static class in Java All the important string methods in Java String Handling Method in Java What are Array strings in Java Advantages and Disadvantages of Strings in Java Big Decimal class in Java Class definition in Java Char and String differences in Java Difference between String, StringBuffer and StringBuilder in java Replace character in string Java String Coding Interview Questions in Java What is String in Java? String isnullorempty in Java String Matches in Java Trim Method in String Java Bean class in Java Libraries in Java Arithmetic Operations on String in Java

Kotlin Vs Java

Kotlin Vs Java

There are many languages available for Android development. Java is the official language for android development but Kotlin is becoming popular nowadays. This article discusses both of these languages and the differences between them.

What is Kotlin?

  • Kotlin is a general-purpose, open source programming language.
  • Kotlin was originally developed by JetBrains, the same company that developed IntelliJ IDEA in the year 2010.
  • Kotlin version 1.0 was officially released in February 2016.
  • Kotlin is now supported by JetBrains and Google via the Kotlin Foundation.
  • Kotlin programs are executed on Java Virtual Machine (JVM). They can be executed on various other platforms.
  • Kotlin follows Object Oriented as well as the Functional Programming approach.

Kotlin program Example

The following program demonstrates how to write a basic Java program.


 fun main()
 println("Hello World")


Hello World

In the above Kotlin code,the main() function has a printlin()function that displays the output on the console window.

Features of Kotlin

  • Kotlin offers faster compilation.
  • Kotlin provides many extension functions without changing any code.
  • Smart cast feature helps to reduce the cost of application and improves the speed as well as the performance of the application.

What is Java?

  • Java is an Object-Oriented Programming language. It was developed and releasedby Sun Microsystems in the year 1995.
  • Java programming is one of the most preferred programming languages because of security. It is platform-independent. It does not support explicit pointers. It makes Java programs more secure.
  • One must install JDK before executing the Java program. The Java code is first compiled into a byte code. And the byte code is then interpreted. The byte code can be executed on any other platform which has Java Virtual Machine (JVM) installed on it. This makes the Java programs portable.
  • There are three versions of Java.
  • Java EE (Enterprise Edition)
  • Java SE (Standard Edition)
  • Java ME (Micro Edition)   

Java program Example

The following program demonstrates how to write a basic Java program.

 /* Declaration of Class */
 class Sample
     /* Driver Code */
     public static void main(String ar[])
       /* Print statement */
 System.out.println("Hello World"); 


Hello World

The above Java program declares a class Sample. The System.out.println() method displays the output on the output window.

Features of Java

  • It provides Write Once Run Anywhere functionality.
  • It allows distributed computing because of the Write Once Run Anywhere approach.
  • Itsupports multithreading and provides a garbage collection facility.

Kotlin Vs. Java

Sr. No.KotlinJava
1.Kotlin doesn’t support static members.Java allows declaring static members in the class.
2.In Kotlin, variables of primitive data types are treated as objects.In Java, variables of primitive data types are not objects.
3.It easier to code and deploy Kotlin programs.It is hard to deploy Java programs.
4.It supports the concept of invariant arrays.It does not support the concept of invariant arrays.
5.It provides a smart cast feature.It does not have a smart cast feature.
6.It works with Object Oriented and Functional Programming approach.It works with Object Oriented Programming approach.
7.Kotlin does not require data type specification while declaring a variable.It requires data type specification while declaring a variable.
8.Itdoesn’t support wild-card type.Java supports wild-card type.
9.It allows one or more secondary constructors.It doesn’t have any secondary constructors. But it supports multiple constructors.
10.It doesn’t have any implicit conversions.Java programming allows implicit conversions.
11.It offers extension functions.It doesn’t have any extension functions.
12.It comes with Lambda expression.It does not have any Lambda expressions.
13.It offers String templates.Java supports String templates but does not offer expressions like in Kotlin.
14.It does not have null variables or objects.There are null variables and objects in Java.
15.It provides in built null safety.Java has aNullPointer exception for handling null values.

Which is better Kotlin or Java?

This question is asked by many developers who are working on an android project. Java is the official language for Android development. Therefore, a developer might have their past projects of Android developed in Java. And if they want to add new functionalities it can be done using Kotlin. It means an android application can be built using both these languages.

For developers who are starting a project from beginning in Android, they should prefer Kotlin because of its compelling advantages like provided null safety, support of functional programming.

In this article, we have learned the basics about Kotlin and Java programming languages, their features. We have also discussed the difference between Kotlin and Java.