why Java is a independent platform

Question

Java programs are accessible to any System

Answer 1

Java programs run on all systems because it compiles into a .jar file (unlike system-dependant binaries like .exe and .app) which is then executed on the JRE (Java Runtime Environment). Billions of devices run Java natively, including most modern computers.

Answer 2

One of the key reasons Java technology is useful in a networked environment is that Java makes it possible to create binary executables that will run unchanged on multiple platforms. This is important in a networked environment because networks usually interconnect many different kinds of computers and devices. In a typical enterprise environment, for example, a network might connect Macintoshes in the art department, UNIX workstations in engineering, and PCs running Windows everywhere else. Although this arrangement enables various kinds of computers and devices within the company to share data, it requires a great deal of administration. Such a network presents a system administrator with the task of keeping different platform-specific editions of programs up to date on many different kinds of computers. Programs that can run without change on any networked computer, regardless of the computer's type, make the system administrator's job simpler, especially if those programs can actually be delivered across the network.
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