JDK Architecture
It is a package
provided by oracle community basically we use this to develop java programs. It
consists of JRE (Java runtime environment) as well as development tools to
develop java applications
JVM (Java virtual machine)
It is an
interpreter which reads the .class file (byte code) line by line execute
JRE (Java runtime environment)
It used to run the java codes. If I want to just
run the java software we need JRE
JRE consist
of JVM and some built in library file to run the java codes with this it
converts byte code to machine understandable
JDK installation
Step 1: visit
to any browser and search for JDK version which you want to install
Step 2: After
that download JDK file and install it.
Step 3: Go
search bar (on main screen) search for ‘Environmental variable’ and give the
path.
Steps to create, compile and execute java program
Step 1: To
create a java program, we need editors e.g notepad, wordpad , etc. also we can
use IDE (Integrated development environment) e.g Eclipse, visual studio, net
beams, etc.
After writing
the program we need save the program with extension .java
Step 2: Call
the java compiler to create class file
A compiler checks
syntax (rules) if the syntax is correct
class file generate if syntax is wrong we
get compile error
Step 3:
Execute the class file with the help of JRE
