JAVA(object oriented programming language)
Java is a general-purpose programming language that is class-based, object-oriented (although not a pure object-oriented language, as it contains primitive types[unreliable source?]), and designed to have as few implementation dependencies as possible. It is intended to let application developers write once, run anywhere(WORA),meaning that compiled Java code can run on all platforms that support Java without the need for recompilation. Java applications are typically compiled to bytecode that can run on any Java virtual machine (JVM) regardless of the underlying computer architecture. The syntax of Java is similar to C and C++, but it has fewer low-levelfacilities than either of them. As of 2019, Java was one of the most popular programming languages in use according to GitHub,particularly for client-server web applications, with a reported 9 million developers.
JavaParadigmMulti-paradigm: generic, object-oriented (class-based), imperative, reflectiveDesigned byJames GoslingDeveloperSun MicrosystemsFirst appearedMay 23, 1995; 24 years ago Typing disciplineStatic, strong, safe, nominative, manifestFilename extensions.java, .class, .jarWebsiteoracle.com/java/Major implementationsCompilers: OpenJDK (javac, sjavac), GNU Compiler for Java (GCJ), Eclipse Compiler for Java (ECJ)
Virtual machines: OpenJDK JRE, Oracle JRockit, Azul Zing, IBM J9, Excelsior JET, Gluon VM, Microsoft JVM, Apache Harmony
JIT compilers: HotSpot, GraalVM, Azul Falcon (LLVM)Influenced byAda 83, C++, C#, Eiffel, Mesa, Modula-3, Oberon, Objective-C,UCSD Pascal,Object Pascal InfluencedAda 2005, BeanShell, C#, Chapel, Clojure, ECMAScript, Fantom, Gambas,Groovy, Hack, Haxe, J#, Kotlin, PHP, Python, Scala, Seed7, Vala Java Programming at Wikibooks
Java was originally developed by James Gosling at Sun Microsystems (which has since been acquired by Oracle) and released in 1995 as a core component of Sun Microsystems' Java platform. The original and reference implementation Java compilers, virtual machines, and class libraries were originally released by Sun under proprietary licenses. As of May 2007, in compliance with the specifications of the Java Community Process, Sun had relicensedmost of its Java technologies under the GNU General Public License. Meanwhile, others have developed alternative implementations of these Sun technologies, such as the GNU Compiler for Java (bytecode compiler), GNU Classpath (standard libraries), and IcedTea-Web (browser plugin for applets).
The latest versions are Java 12, released in March 2019, and Java 11, a currently supported long-term support (LTS) version, released on September 25, 2018; Oraclereleased for the legacy Java 8 LTS the last free public update in January 2019 for commercial use, while it will otherwise still support Java 8 with public updates for personal use up to at least December 2020. Oracle (and others) highly recommend uninstalling older versions of Java because of serious risks due to unresolved security issues. Since Java 9 (and 10) is no longer supported, Oracle advises its users to immediately transition to Java 11 (Java 12 is also a non-LTS option).
Duke, the Java mascot
James Gosling, the creator of Java, in 2008
The TIOBE programming language popularity index graph from 2002 to 2018. Java is steadily on the top since mid-2015.
James Gosling, Mike Sheridan, and Patrick Naughton initiated the Java language project in June 1991. Java was originally designed for interactive television, but it was too advanced for the digital cable television industry at the time. The language was initially called Oak after an oak tree that stood outside Gosling's office. Later the project went by the name Green and was finally renamed Java, from Java coffee. Gosling designed Java with a C/C++-style syntax that system and application programmers would find familiar.
Sun Microsystems released the first public implementation as Java 1.0 in 1996.It promised Write Once, Run Anywhere (WORA), providing no-cost run-times on popular platforms. Fairly secure and featuring configurable security, it allowed network- and file-access restrictions. Major web browserssoon incorporated the ability to run Java applets within web pages, and Java quickly became popular. The Java 1.0 compiler was re-written in Java by Arthur van Hoff to comply strictly with the Java 1.0 language specification. With the advent of Java 2 (released initially as J2SE 1.2 in December 1998 – 1999), new versions had multiple configurations built for different types of platforms. J2EE included technologies and APIs for enterprise applications typically run in server environments, while J2ME featured APIs optimized for mobile applications. The desktop version was renamed J2SE. In 2006, for marketing purposes, Sun renamed new J2 versions as Java EE, Java ME, and Java SE, respectively.
In 1997, Sun Microsystems approached the ISO/IEC JTC 1 standards body and later the Ecma International to formalize Java, but it soon withdrew from the process.
Now a days JAVA is one of the popular programming language. If you want to make your carrer in software engineering, you
