Java is an object oriented language developed by sun Microsystems. the java language was designed to be small, simple and portable across platforms and operating systems, both at the source and at the binary level, which means that java programs (applets and applications) can run on any machine that has the java virtual machine).

Java is modeled after C and C++, and much of the syntax and object-oriented structure is borrowed from the latter. Although Java looks similar to C and C++, most of the more complex parts of those languages have been excluded from Java, making the language simpler without sacrificing much of its power. There are no pointers in Java, nor is there pointer arithmetic. Strings and arrays are real objects in Java. Memory management is automatic. To an experienced programmer, these omissions may be difficult to get used to, but to beginners or programmers who have worked in other languages, they make the Java language far easier to learn.

Platform-independent Java is however very successful with server-side applications, such as Web Services, Servlets, and Enterprise java beans, as well as with Embedded system based on OSG using Embedded Java environments.

Java applet, however, is a self-contained application within a Web page, and is limited to the region it occupies within a window. Applets can react only to commands within the window’s boundaries, but with JavaScript, events anywhere in an HTML page can be passed to Java applets.

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