What is Java?
A high-level programming language developed by Sun Microsystems. Java was originally called OAK, and was designed for handheld devices and set-top boxes. Oak was unsuccessful so in 1995 Sun changed the name to Java and modified the language to take advantage of the burgeoning World Wide Web.
Java is an object-oriented language similar to C++, but simplified to eliminate language features that cause common programming errors. Java source code files (files with a .java extension) are compiled into a format called bytecode (files with a .class extension), which can then be executed by a Java interpreter. Compiled Java code can run on most computers because Java interpreters and runtime environments, known as Java Virtual Machines
(VMs), exist for most operating systems, including UNIX, the Macintosh OS, and Windows. Bytecode can also be converted directly into machine language instructions by a just-in-time compiler (JIT).
Java is a general purpose programming language with a number of features that make the language well suited for use on the World Wide Web. Small Java applications are called Java applets and can be downloaded from a Web server and run on your computer by a Java-compatible Web browser, such as Netscape Navigator or Microsoft Internet Explorer.
More Reference below:
More elaborated definitions and development can be found here.
Java Programming Language Syntax or Command Parameters can be found here.
Lets get started...
JAVA Programming Part I
Tutorial - 1 - Installing the JDK
Tutorial - 2 - Running a Java Program
Tutorial - 3 - Downloading Eclipse
Tutorial - 4 - Hello YouTube
Tutorial - 5 - Variables
Tutorial - 6 - Getting User Input
Tutorial - 7 - Building a Basic Calculator
Tutorial - 8 - Math Operators
Tutorial - 9 - Increment Operators
Tutorial - 10 - If Statement
Tutorial - 11 - Logical Operators
Tutorial - 12 - Switch Statement
Tutorial - 13 - While Loop
Tutorial - 14 - Using Multiple Classes
Tutorial - 15 - Use Methods with Parameters
Continue to Java Programming Part II
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