Learn JAVA In 21 Days

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.
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