Podcast
Questions and Answers
What is the primary goal of Java's design?
What is the primary goal of Java's design?
- To have as few implementation dependencies as possible (correct)
- To be a low-level programming language
- To be a platform-specific language
- To have a syntax similar to C and C++
What is the purpose of the Java Virtual Machine (JVM)?
What is the purpose of the Java Virtual Machine (JVM)?
- To run Java code on any platform (correct)
- To compile Java code into bytecode
- To provide low-level facilities for Java
- To modify Java code at runtime
What is the current latest version of Java as of March 2024?
What is the current latest version of Java as of March 2024?
- Java 21
- Java 22 (correct)
- Java 23
- Java 20
What is the name of the process that allows Java code to run on multiple platforms?
What is the name of the process that allows Java code to run on multiple platforms?
What is the license under which Sun relicensed most of its Java technologies in 2007?
What is the license under which Sun relicensed most of its Java technologies in 2007?
What was the original purpose of the Java language project?
What was the original purpose of the Java language project?
Who rewrote the Java 1.0 compiler in Java to comply with the Java 1.0 language specification?
Who rewrote the Java 1.0 compiler in Java to comply with the Java 1.0 language specification?
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 feature of Java 1.0 that made it popular?
What was the main feature of Java 1.0 that made it popular?
Why did Sun Microsystems withdraw from the ISO/IEC JTC 1 standards body?
Why did Sun Microsystems withdraw from the ISO/IEC JTC 1 standards body?
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 programmers to write once, run anywhere (WORA), meaning compiled Java code can run on all platforms that support Java without recompilation.
Key Features
- Java applications are typically compiled to bytecode that can run on any Java virtual machine (JVM) regardless of the underlying computer architecture.
- The Java runtime provides dynamic capabilities, such as reflection and runtime code modification, not typically available in traditional compiled languages.
- Java has fewer low-level facilities than C and C++, despite similar syntax.
History
- Java was originally developed by James Gosling at Sun Microsystems, released in May 1995 as a core component of Sun's Java platform.
- Initially designed for interactive television, but it was too advanced for the digital cable television industry at the time.
- The language was initially called Oak, later renamed Green, and finally Java, named after a type of coffee from Indonesia.
Development and Release
- Java 1.0 was released in 1996, promising write once, run anywhere (WORA) functionality with no-cost run-times on popular platforms.
- The first public implementation included configurable security, network- and file-access restrictions.
- Major web browsers soon incorporated the ability to run Java applets within web pages, making Java quickly popular.
Evolution and Versions
- Java 2 (released as J2SE 1.2 in 1998-1999) introduced multiple configurations for different platforms.
- J2EE included technologies and APIs for enterprise applications, while J2ME featured APIs optimized for mobile applications.
- In 2006, Sun renamed new J2 versions as Java EE, Java ME, and Java SE, respectively.
- 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
Learn about Java, a high-level, object-oriented programming language designed to have minimal implementation dependencies. Understand its features and capabilities.
