Why is java is neutral platform independent?

Answer 1

Java solves the problem of platform-independence by using

byte code. The Java compiler does not produce native

executable code for a particular machine like a C compiler

would. Instead it produces a special format called byte

code. Java byte code written in hexadecimal, byte by byte,

looks like this:

CA FE BA BE 00 03 00 2D 00 3E 08 00 3B 08 00 01 08 00 20 08

This looks a lot like machine language, but unlike machine

language Java byte code is exactly the same on every

platform. This byte code fragment means the same thing on a

Solaris workstation as it does on a Macintosh PowerBook.

Java programs that have been compiled into byte code still

need an interpreter to execute them on any given platform.

The interpreter reads the byte code and translates it into

the native language of the host machine on the fly. The most

common such interpreter is Sun's program java (with a little

j). Since the byte code is completely platform independent,

only the interpreter and a few native libraries need to be

ported to get Java to run on a new computer or operating

system. The rest of the runtime environment including the

compiler and most of the class libraries are written in Java.

All these pieces, the javac compiler, the java interpreter,

the Java programming language, and more are collectively

referred to as Java.

Answer 2

When Java Code is compiled a byte code is generated which is independent of the system. This byte code is fed to the JVM (Java Virtual Machine) which resides in the system. Since every system has its own JVM, it doesn't matter where you compile the source code. The byte code generated by the compiler can be interpreted by any JVM of any machine. Hence it is called Platform independent Language.

Java's bytecodes are desgined to be read and interpreted in exactly same manner on any computer hardware or operating system that supports Java Runtime Environment.

The Java Virtual Machine can be called a virtual operating system that enables a java programme to run... we are thus calling java platform independent because a java program will not give different outputs on different machines but platform dependent programmes tend to give different results when compiled on different machines...

Answer 3

A Java program execution consists of compilation as well as interpretation.

Compiler- This part converts the program written in high level level language to byte code[an intermediate code].

This byte code is the reason for which Java is Platform Independent. This byte code can be traveled from machine to machine.

Interpreter- There are different interpreters of byte code of java for different

different platforms. They convert the byte code to the respective

machine language which the machine can understand.

Answer 4

When you program in any programming language, you compile your program before executing it. Compiling your program means you've converted your source code ( text ) into machine code( which can be executed)... Every machine has a different set of rules to execute a program... for example, Linux executes program differently than Microsoft Windows and Mac OS. So the compilers for these OS compile program differently. This is not the case with Java.. Java compiler compiles the source code into ByteCode, which is analogue to machine. The user must install Java VM, which then converts the ByteCode into machine code. Now the Java VM interprets the ByteCode according to machine.. So once you've Compiled your program ( turned into ByteCode) you can execute it anywhere( Java VM must be installed, and usually is installed).

Answer 5

Java is known as platform-neutral language because Java's bytecodes are designed to be read, interpreted, and executed in exactly the same manner on any computer hardware or operating system that supports a Java run-time.

Answer 6

Because it will work on all platforms because it's code is compiled through it's on Virtual Machine, the JVM (Java Virtual Machine).