What is Java Language (Technology or Platform)?

August 20, 2019

What is Java Language (Technology or Platform)?

JAVA TECHNOLOGY

Java technology everything but a high level programming language as well as it is a platform also.

Java programming language has some characteristics which are given below:-

Simple
Object oriented
Distributed
Dynamic
Multi threaded
Robust
Secure
Portable

In Java programming where we write our program is known as source file.

In Java language every source file as plain text inside it and has extension '.java'.

This source file are get compiled into .class file by the javac compiler.

.class file has some code which is known as Bytecode.

Bytecode is the code which is understandable to the Java virtual machine.

Bytecode is a machine language of Java virtual machine.

Use Java launcher to run a Java program.

Java virtual machine is available for different operating system like Microsoft Windows, Solaris, UNIX and for others.

Once Java compiler compiles Java source file and creates .class file then we can used that .class file on any operating system JVM.

You don't have to code again for different operating system because of JVM it provides a common platform for .class file.

JAVA PLATFORM

A platform is environment. It can be a hardware or software environment.

There are some platforms:

a. Microsoft Windows

b. Solaris OS

c. Mac OS

Lots of platforms are described as a combination of operating system and underlying hardware.

Java platform is the software only platform that runs on top of the other hardware based platform.

Java platform is a combination of 2 components:

1) The Java Virtual Machine

2) The Java Application Programming Interface(API)

· We have already seen what is Java virtual machine now let's see what is Java API.

· Java API is a large collection of ready made software components which provides useful capabilities.

· It is grouped into libraries of related interfaces any classes; these libraries are called packages.

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