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Questions and Answers
What is the main goal of Java's design?
What is the characteristic of Java code that allows it to run on multiple platforms?
What is the current latest version of Java?
Who developed Java originally?
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What is the license under which most of Java's technologies were relicensed?
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What was the original name of the Java language project?
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What was Java originally designed for?
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What was the main feature of Java 1.0 released in 1996?
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What was the result of Arthur van Hoff's work on the Java 1.0 compiler?
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What was the outcome of Sun Microsystems' approach to the ISO/IEC JTC 1 standards body in 1997?
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Study Notes
Java Overview
- Java is a high-level, class-based, object-oriented programming language designed to have minimal implementation dependencies.
- It is a general-purpose language intended to allow "write once, run anywhere" (WORA) functionality, meaning compiled code can run on all platforms supporting Java without recompilation.
Java Features
- Java code is compiled to bytecode that can run on any Java virtual machine (JVM), regardless of the underlying computer architecture.
- The syntax is similar to C and C++, but has fewer low-level facilities.
- The Java runtime provides dynamic capabilities, such as reflection and runtime code modification, not typically available in traditional compiled languages.
Popularity and History
- Java gained popularity shortly after its release and has been a popular language since then.
- It was the third most popular programming language in 2022 according to GitHub.
- Despite a gradual decline in use, Java remains widely popular, with other languages using JVM gaining popularity.
Development and Release
- Java was originally developed by James Gosling at Sun Microsystems and released in May 1995 as a core component of Sun's Java platform.
- The original and reference implementation Java compilers, virtual machines, and class libraries were initially released under proprietary licenses.
- As of May 2007, Sun relicensed most Java technologies under the GPL-2.0-only license.
- Oracle offers its own HotSpot Java Virtual Machine, while the official reference implementation is the OpenJDK JVM, which is free and open-source software.
Versions
- As of March 2024, Java 22 is the latest version.
- Java 8, 11, 17, and 21 are previous LTS versions still officially supported.
History of Java Development
- James Gosling, Mike Sheridan, and Patrick Naughton initiated the Java language project in June 1991.
- Java was initially designed for interactive television but was too advanced for the digital cable television industry at the time.
- The language was initially called Oak, then Green, and finally renamed Java after Java coffee from Indonesia.
- Gosling designed Java with a C/C++-style syntax to make it familiar to system and application programmers.
- Sun Microsystems released the first public implementation as Java 1.0 in 1996, promising WORA functionality and providing no-cost run-times on popular platforms.
- Java quickly became popular, with major web browsers incorporating the ability to run Java applets within web pages.
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Description
Learn about Java, a high-level, object-oriented programming language that enables 'write once, run anywhere' functionality. Understand its features and capabilities.
