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Java Programming Language Overview
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Java Programming Language Overview

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Questions and Answers

What is the main goal of Java's design?

  • To be a platform-specific language
  • To be a scripting language
  • To have as few implementation dependencies as possible (correct)
  • To be a low-level, high-performance language
  • What is the characteristic of Java code that allows it to run on multiple platforms?

  • It is interpreted at runtime
  • It is compiled to native code
  • It is compiled to bytecode that can run on any JVM (correct)
  • It is platform-specific
  • What is the current latest version of Java?

  • Java 22 (correct)
  • Java 23
  • Java 21
  • Java 20
  • Who developed Java originally?

    <p>James Gosling at Sun Microsystems</p> Signup and view all the answers

    What is the license under which most of Java's technologies were relicensed?

    <p>GPL-2.0-only</p> Signup and view all the answers

    What was the original name of the Java language project?

    <p>Oak</p> Signup and view all the answers

    What was Java originally designed for?

    <p>Interactive television</p> Signup and view all the answers

    What was the main feature of Java 1.0 released in 1996?

    <p>Write once, run anywhere (WORA) functionality</p> Signup and view all the answers

    What was the result of Arthur van Hoff's work on the Java 1.0 compiler?

    <p>A compiler that complied strictly with the Java 1.0 language specification</p> Signup and view all the answers

    What was the outcome of Sun Microsystems' approach to the ISO/IEC JTC 1 standards body in 1997?

    <p>Sun withdrew from the process</p> Signup and view all the answers

    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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    Learn about Java, a high-level, object-oriented programming language that enables 'write once, run anywhere' functionality. Understand its features and capabilities.

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