Full stack java training demo for both frontend and backend with database

core java:
==========

lanaguage:
----------

to communicate with person
General languages:
------------------
engilsh,hindi,telugu,tamil

programming language:
===================
to machine--->binary lanaguage--->o's 1's

ATM APPLICATIONS
CALCLULATOR APPLICATIONS
bILLING MACHINE APPLICATIONS

two types applications:

1.standalone applications/desktop : antvirus, vlc media,acrobatic
2.distributed application/network applications: facebook, instargram,watsup


pop oop
procedure oriented languages object oriented programming

b,bcpl,c, cobolt c++,java,python,.Net



1.security and performance

oopl oop(features)

object oriented programming language object oriented programming

oop------->canadian org(omg)

1.inheritance
2.polymorphism--------->performance
3.abstraction
4.encapsulation----------->security


java:
----

java is object oriented programming language for the purpose of developing both
standalone and distributed applications.

father:james gosling 1995--->sun micro system

current version:jse 17
standard version: java se8

oracle corp: www.oracle.com

3 editions:

jse: java standard edition:core java:
jee:java enterprise edition: advance java:
jme:java micro edition: mobile application



1.platform independent
2.garbage collection

prerequisites to write java program:
----------------------------------
c program-----> c software-->turboC

java---->java software---> jdk(java development kit)8

www.oracle.com---->jdk8

1.download software--
2.install
3.we need editors: notepad, notepad++, eclipse,netbaens, intelij
4.write java program
5.save the file
6.compile the java program
7.execute program

java--> 53 key words--->goto, constant

structure of java program:
------------------------------


class Student
{

public static void main(String args[])
{

System.out.println("welcome to java");
}
}


1. .java
2. .class
3, compilation
4. execution
5, jvm



.java

.class

compilation:

compiler
.java------------------------------->.class


compilation: javac filename.java javac Student

execution: java className




1,platform independent: (WORA)--WRITE ONCE RUN ANYWHERE
======================
PI
windows-------------------------------linux
.java
.class------------------------------->.class

.NET--->PLATFORM DEPENDENT

JAVA ORACLE .NET MICROSOFT


.NET

PD
WINDOWS-------------------------------------LINUX

.CLASS---------------------------->



2.GARBAGE COLLECTION:---->performance
-------------------

int age= 23; //4byts


1000 variables----------->1000*4=4000bytes

1 variable----->waste

garbage collector---> it will collect the unwanted memory space


c++: we need to write prgrom


// single comments

/* multiline comments*/