We explained about important concepts such as OOPs, Data types, Variables, Constants, Constructors, Interfaces, Packages, Exceptional handling, Applets, Streams, Serialization, Multithreading, Collection Frameworks, Network Programming, Design Patterns, String handling and JVM.

1. A JavaDeveloperisresponsible forthe design,development,andmanagementof Java-based
applications.BecauseJavaisusedsowidely,particularlybylarge organizations,the dailyrolesvary
widelybutcaninclude owningaparticularapplicationorworkingonseveral atone time.Inour
currentproject,we are exploringcore javaconceptsendto endalongwithprogrammatic
explanations.
We explainedaboutimportantconceptssuchasOOPs,Datatypes,Variables,Constants,
Constructors,Interfaces,Packages,Exceptional handling,Applets,Streams,Serialization,
Multithreading,CollectionFrameworks,NetworkProgramming,DesignPatterns,Stringhandlingand
JVM.
Class
“A classis a way of bindingthe dataand associatedmethodsinasingle unit”.AnyJAVA programif
we want to developthenthatshouldbe developedwithrespective classonlyi.e.,withoutclassthere
isno JAVA program.In object-orientedprogramming’s,generally,we write twotypesof member
methodsandnon-membermethods.
 A membermethodisone whichiscomingunderthe scope of the class.In JAVA we use only
membermethods.
 Non-membermethodsare those whichdonotcome underthe scope of the class.JAVA does
not allownon-membermethodsatall.
Data Abstraction

2. In real-world we have three levels of abstractions. They are physical level abstraction,
conceptual/logical level abstraction and view level abstraction.
 Physical level abstraction is one; it always deals with physical organization
architecture of the application. For example, in real-world and application designing
of any problem comes under physical level abstraction.
 Conceptual/logicallevel abstractionisone italwaysdealswithwhatkindof datawe are
enteringwithoutdealingwiththe physical architecture of the application. For
example, enteringthe dataintothe database,writingthe codingandapplyingtesting
principle comesunderconceptuallevel abstraction.
 View level abstraction deals with what kind of data we are retrieving without dealing
with both conceptual level abstraction and physical level abstraction. For example,
retrieving the data from the database in various combinations. All internet users
come under view level abstraction.
MultiThreading
The languages like C, C++ comes under single-threaded modelling languages, since there
exist a single flow of controls whereas the languages like JAVA, DOT NET are treated as
multi-threaded modelling languages since there is a possibility of creating multiple flows of
controls.
When we write any JAVA program there exist two threads they are foreground thread and
background thread.
Foreground threads are those which are executing user-defined sub-programs whereas
background threads are those which are monitoring the status of foreground thread. There
is a possibility of creating ‘n’ number of foreground threads and always there exist single
background thread.
Multithreading is the specialized form of multitasking of the operating system.
In information technology, we can develop two types of applications. They are process-
based applications and thread-based applications.
The projects that we covered in the SkillPractical Core Java Learning path are:
1. Java for absolute beginners
2. Making a Basic Payroll Slip Generator using Java
and etc..
The competitive tests we cover in SkillPractical are:
1. Java Core – Programming Test
2. Java Core- Multithreading Test
3. Java Core – Collections Test

3. For more details on Core Java Learning path for beginners please visit our website.
SkillPractical Core Java for beginners is probably the best Java learning platform for
beginners as well as experienced programmers. They will explain core java like
fundamentals of programming in core Java and in examples of Java programming after
implementation the concepts. In case if you have any any queries while doing project or
while learning you can ask in SkillPractical community. You will get solution from the Java
experts.