This is my first post, I here to explain my learning experience

What is Java? Why we learn Java? some kind of questions arise in our my mind before we start to learn java.

The Java is the open source language and open source (the code is visible) is the safest one and it’s a freedom language (free language). It’s maintained by world wide developers community.

Java is developed by oops( object oriented programming structure) concept

Java( has compiler with interpreter structure)

Java development kit

Java virtual machine

Java running environment

Just in timer

Note: The reason to call Java to open source , it is platform independent

Here the platform is os( operating system) and hardware.

Java has compiler and interpreter

1.compiler

It is used translate bunch of code into machine code at a time

2.interpreter

It translate every code to machine code one by one

Jdk

It is the tool to run the program. It has compiler, exception handling, garbage collector.

once the compilation complete the machine code move to processor, after processing we got output.

It converts source code into Java byte (encrypted format ) .class file

JVM

It is used to reduce running time while different OS and hardware system can run same program

The JVM has its own compiler.

It helps the group of different platform systems can the program and it includes just in time compiler.

Java runtime environment is take the Java code compile them and use some set set of libraries to run the program.