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 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
- 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
- Multithreading in Java
- Java Thread Life cycle
- How to Create Thread in Java
- Java Runnable interface
- Java Thread class
- Synchronization in Java
Serialization
- Java Serialization
- Java transient
Networking
- Java Network Programming
- Java Socket Programming
- Java URL
- Java URLConnection
- Java InetAddress
Swing
Java Collections
- Collection Framework 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 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
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