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Questions and Answers
What was the original purpose of the Java language project?
What was the original purpose of the Java language project?
Why did Sun Microsystems release the first public implementation of Java in 1996?
Why did Sun Microsystems release the first public implementation of Java in 1996?
What was the name of the project before it was finally renamed Java?
What was the name of the project before it was finally renamed Java?
What was the main reason behind the re-write of the Java 1.0 compiler?
What was the main reason behind the re-write of the Java 1.0 compiler?
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What happened to Sun Microsystems' attempt to formalize Java through the ISO/IEC JTC 1 standards body?
What happened to Sun Microsystems' attempt to formalize Java through the ISO/IEC JTC 1 standards body?
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What is the primary goal of Java language design?
What is the primary goal of Java language design?
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What is the main advantage of Java bytecode?
What is the main advantage of Java bytecode?
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Who is the original developer of Java?
Who is the original developer of Java?
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What is the current latest version of Java as of March 2024?
What is the current latest version of Java as of March 2024?
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What is the default JVM for almost all Linux distributions?
What is the default JVM for almost all Linux distributions?
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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 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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Description
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.