Java Programming Language
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Questions and Answers

What was the original purpose of the Java language project?

  • For mobile devices
  • For interactive television (correct)
  • For server-side programming
  • For developing desktop applications
  • Why did Sun Microsystems release the first public implementation of Java in 1996?

  • To give developers an alternative to C/C++
  • To enable write once, run anywhere functionality (correct)
  • To provide a secure platform for network and file access
  • To create a new programming language for mobile devices
  • What was the name of the project before it was finally renamed Java?

  • Tea
  • Green (correct)
  • Mocha
  • Coral
  • What was the main reason behind the re-write of the Java 1.0 compiler?

    <p>To comply strictly with the Java 1.0 language specification</p> Signup and view all the answers

    What happened to Sun Microsystems' attempt to formalize Java through the ISO/IEC JTC 1 standards body?

    <p>It was withdrawn from the process</p> Signup and view all the answers

    What is the primary goal of Java language design?

    <p>To have as few implementation dependencies as possible</p> Signup and view all the answers

    What is the main advantage of Java bytecode?

    <p>It can run on any platform that supports Java without recompilation</p> Signup and view all the answers

    Who is the original developer of Java?

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

    What is the current latest version of Java as of March 2024?

    <p>Java 22</p> Signup and view all the answers

    What is the default JVM for almost all Linux distributions?

    <p>OpenJDK JVM</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 Java code can run on all platforms that support Java without needing recompilation.

    Java Features

    • Java applications are compiled to bytecode that can run on any Java virtual machine (JVM) regardless of the underlying computer architecture.
    • Java syntax is similar to C and C++, but with fewer low-level facilities.
    • The Java runtime provides dynamic capabilities such as reflection and runtime code modification, typically not available in traditional compiled languages.

    Java Popularity

    • Java gained popularity shortly after its release and has been a very popular programming language since then.
    • It was the third most popular programming language in 2022 according to GitHub.
    • Although still widely popular, there has been a gradual decline in Java use in recent years, with other languages using JVM gaining popularity.

    Java History

    • Java was originally developed by James Gosling at Sun Microsystems.
    • It was 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 by Sun under proprietary licenses.
    • As of May 2007, Sun had relicensed most of its Java technologies under the GPL-2.0-only license.

    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, later renamed Green, and finally renamed Java, after Java coffee, a type of coffee from Indonesia.
    • Gosling designed Java with a C/C++-style syntax that system and application programmers would find familiar.

    Java Releases

    • Sun Microsystems released the first public implementation as Java 1.0 in 1996.
    • Java 1.0 promised write once, run anywhere (WORA) functionality, providing no-cost run-times on popular platforms.
    • Major web browsers soon incorporated the ability to run Java applets within web pages, and Java quickly became popular.
    • Java 2 (released initially as J2SE 1.2 in December 1998 – 1999) had multiple configurations built for different types of platforms.
    • As of March 2024, Java 22 is the latest version, with Java 8, 11, 17, and 21 being previous LTS versions still officially supported.

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    Java is a high-level, class-based, object-oriented programming language that allows for platform-independent development. It's designed to let programmers write once, run anywhere.

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