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What is Java?
Java is an object-oriented, robust, secured and platform-independent programming language. With the help of Java Programming, we can develop console, window, web, enterprise and mobile applications.
Java language was developed in 1995 by James Gosling who is known as the father of Java. The first version of Java released on 23rd January, 1996.
There are three editions of Java: Java SE (Java Standard Edition), Java EE (Java Enterprise Edition), and Java ME (Java Micro Edition).
Java Hello World Example
File: HelloWorldJava.java
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class HelloWorldJava { public static void main(String[] args) { System.out.println("Hello World!"); } } |
Output:
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Hello World! |
Compile By:
javac HelloWorldJava.java
Run By:
java HelloWorldJava
Core Java Tutorial Index
Introduction
- Java Features
- C++ vs Java
- Java History
- Java Hello World
- Java Development Kit
- Java Runtime Environment
- Java Virtual Machine
- Difference between JDK, JRE, and JVM
- Memory Areas in Java
- How to install Java
- Java Operators
- Java Keywords
- Primitive Data Types
- Variables
Java Loops
Java Programs
- Java Programs
- Factorial Program in Java
- Fibonacci Series Program in Java
- Prime Number Program in Java
- Palindrome Number Program in Java
- Armstrong Number Program in Java
- Anagram Program in Java
Java Sorting
- Sorting Algorithms in Java
- Merge Sort in Java
- Quick Sort in Java
- Bubble Sort in Java
- Insertion Sort in Java
- Selection Sort in Java
- Heap Sort in Java
- Radix Sort in Java
- Topological Sort in Java
- Bucket Sort in Java
- Counting Sort in Java
Java OOPs Concepts
- OOPs – Object Oriented Programming
- Objects and Classes in Java
- Methods 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 Enum
- Java Math
Java Strings
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
- Java Try with Resource
Garbage Collection
- Automatic Resource Management in Java
- Java Garbage Collection
- Java finalize()
- Java gc()
- Difference between final, finally and finalize
Multithreading
- Process and Thread in Java.
- Multithreading 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 Write to File
- Java FileReader
- Java BufferedReader
- Java FileWriter
- Java BufferedWriter
- Java InputStreamReader
- Scanner in Java
- Java StringReader
- Java StringWriter
- Java PrintWriter
- Java File
- Java Read File Line By Line
- Java FileInputStream
- Java FileOutputStream
- Java Create File
- Java Delete File
- Java Open File
- Java Read File to String
- Java Copy File
- Java Append to File
- Java Read CSV File
- Java Read JSON File
- Jar File in Java
- Java RandomAccessFile
- Java Rename File
- Java Create Directory
- Java Delete Directory
- Java FileNotFoundException
Serialization
- Java Serialization
- Java transient
Networking
- Java Network Programming
- Java Socket Programming
- Java URL
- Java URLConnection
- HttpURLConnection in Java
- Java InetAddress
- Java DatagramSocket and Java DatagramPacket
AWT
- Java AWT
Swing
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
- Java JDBC Tutorial
- JDBC Drivers
- Java Database Connectivity with MySQL
- Java Database Connectivity with Oracle
Java Differences
- Java vs JavaScript
- Python vs Java
- Kotlin vs Java
- Java vs C++
- C# vs Java
- Java Float vs Double
- Scala vs Java
- Go vs Java
- Java extends vs implements
- Node.js vs Java
- Static vs Non-static in Java
- C vs Java
- int vs Integer in Java
- Java vs JavaScript
- Java Protected vs Private
- .Net vs Java
- Stack vs Heap in Java
- Java Array vs ArrayList
- Java SE vs EE
- Class vs Object in Java
Java Servlet Tutorial
Java JSP Tutorial
Hibernate Tutorial
Spring Tutorial
Spring MVC 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.fma()
- Math.getExponent()
- Math.hypot()
- Math.IEEEremainder()
- Math.incrementExact()
- Math.log()
- Math.log10()
- Math.log1p()
- Math.max()
- Math.min()
- Math.multiplyExact()
- Math.multiplyFull()
- Math.multiplyHigh()
- 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
- String to int
- int to String
- String to long
- long to String
- String to float
- float to String
- String to double
- double to String
- String to Date
- Date to String
- String to Object
- Object to String
- String to char
- char to String
- int to long
- long to int
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