Java

 Introduction to Java:

Java is an Object-Oriented Programming Language. Java is a Popular Programming language introduced in 1995 and is now owned by Oracle(a Software Company). Now, More Than 3 Billion devices run Java.             

It is used for many applications like; Web Applications, Mobile Applications, Gaming Applications, Business Applications, Scientific Applications, etc

JAVA was Developed by:

The Java Programming Language was developed by Sun MicroSystems
in 1990.b The founder of Java is James Gosling
In the Start, java was A simple language used for general purposes but going on it became the world's greatest language

what javascript:

Java Script is a scripting language that makes you make your website dynamic content, control multimedia, animate images, and pretty much 
Many people think that javascript is a part of Java but that is wrong java script is not a part of Java. Javascript is used in Web development and Java is used in many applications

java with Net beans:

Net Beans is an integrated development environment (IDE) for java 

Net Beans IDE is free and open-source  It supports many Languages in Java is one of them.
Mainly Net beans are well suitable for Java so, most people use Net Beans for Java

what is Java used for:

Developers use Java to construct applications in laptops, games, scientific supercomputers, cell phones, data centers,s, and many other devices
java is the world's third most popular Programming language after Python and C

 Java is also used in Framework and Android applications and many With only these languages you can learn the total Software World

Java vs core Java:

Many people want to know what is java and what core Java Here you can learn about what Java is and what Core Javan  Java is a Programming language Core Java is a computing platform

Core Java:

It includes Java Standard Edition(J2SE)
It contains  OOP, Data Types, Operators, Exception handling, threading, swing, and Collections 
Uses Single tier Architecture 
Helps to build general applications

Advanced Java:

Includes Java Enterprise Edition(J2EE)
It contains Database connectivity, Web Services, Servlets, JSP, EJB, etc 
Uses two-tier architecture:
 E,g: client, serve Architecture
Helps to build Enterprise level applications 
e.g. web applications and etc...

 Applications of Java Programming Language:

Mobile applications:

Java is considered the official programming language for mobile app development. It is suitable for the software of Android and Kotlin.

Java is a better programming language than others for mobile app development as it can run on JVC(Java Virtual Machin). In contrast, Andriod uses DVK(Dalvik Virtual Machine) to execute class files. Java also provides better security and also provide a simple interface with Andriod. 

Desktop GUI  applications:

All the desktop applications are developed using Java. Java is the one good programming language that is suitable built the Desktop GUI application and the new version of Java also shows very good support for the DEsktop GUI applications

Web-based applications:

Java is also used for web-based applications. Java provides good support for web-based applications through Servlets and Struts. with this software, we can build web-based applications easily. Java provides all this and good security to develop web-based applications and this makes it to build a large number of applications for any purpose.

Enterprise applications:

Java is the best choice for many software companies for programming applications and multi-purpose. Java provides an application called Java Enterprise application, which provides API and runtime environment 

Gaming applications:

Java will support the open source for the most powerful 3D Engine, The JMOnkeyEngine which has unparalleled capability when it comes to the designing of 3D games. For any type of game development, java is totally supported for them.

Java syllabus for beginners:

• what is Java?

• What are Java Virtual Machine (JVM) and its structure?

• How to Download and Install Java JDK 8 on Windows

• How to Download and Install Eclipse to Run Java

• Why only Eclipse 

• How to create your first Java Program

• OOPS concepts in Java

• Abstraction in OOPS

• Encapsulation in Java OOPs

• Java variables 

• Class and Object in Java OOPS

• Java Arrays tutorial 

• Array of Objects 

• ArrayList in Java

• Java String 

• Java  Convert String to int

• HashMAp in java

• Java Command Line Arguments

• "This" Keyword in Java

• Garbage collection in Java

• Java Static Variables 

•  Memory Allocation in Java 

• Inheritance in Java

• Polymorphism in java

• Abstraction in java

• Interface in java

• Interface Vs Abstract Class

• Constructor in java

• Packages in Java

• Try Catch in Java

• User-Defined Exception

• Java Throws Keyword

• Java for-each loop

• Java Switch Statements 

• Maths with Java

• Java Switch Statements 

Features of Java:  

Java provides many features with every support.

such as:

• Simple

• Object-Oriented

• Portable

• Platform independent 

• Secured

• Robust

• Architecture  neutral

• Interpreted 

• High performance 

• Multithreaded

• Distributed

• Dynamic

Simple:

Java is very easy to learn, and its syntax is very simple and easy to understand according to the company that controls Java Sun Microsystem, Java language is a simple programming language because :
 Java syntax is based on C++ so it is easy for programmers to learn it after C++
In Java language, they removed many complicated modules which are rarely used in real-life applications.

Object-oriented:

Java is an object-oriented programming language. This means everything in Java is an Object.

Object-oriented programming (OOPS) is a simple method to create software by that object by providing some rules.
Some of the main concepts in the OOPS are:
1) Object
2) Class
3) Inheritance
4) Polymorphism
5) Abstraction
6) Encapsulation 

Platform independent:

Java language is a platform-independent language because it is different from other languages like C, C++, etc.. while it is compiled into platform-specific machines Java is a write-once, run-anywhere language. A platform is the hardware or software environment in which a program runs.

There are two types of platforms software-based and hardware-based. Java provides a software-based platform.
The Java platform differs from most other platforms in the sense that it is a Software-based platform that runs on top of Hardware-based platforms. It has two components.
1) Runtime Environment 
2) API(Application Programming Interface)

Portable:

Java is portable because it facilities you to carry the Java bytecode to any Platform. It does not require any implementation.

Secured:

Java is best known for its security. with Java, We can Develop virus-free Systems. 
Java is very Secure Because:
    1) No explicit Pointer
    2) Java Programs run inside a Virtual Sandbox.

Classloader:

Classloader in Java is a part of the Java Runtime Environment (JRE), which is used to dynamically load Java classes into the Java Virtual Machine. It adds security by separating the package for the classes of the local file system from those that are imported from network sources.

Bytecode Verifier:

 It checks the code Fragments for illegal code that can violate access rights to objects.

Security Manager:

It detects what resources a class can access such as writing from a local disk.

Robust:

Java is a programming language with robust because 

It uses strong memory management 

There is a lack of pointers that avoid security problems.

Java provides automatic garbage collection which runs on the Java Virtual Machine to get rid of Objects which are not being used by Java Applications  anymore

There are exception-handling and type-checking mechanisms in Java. All these points make Java Robust.

Architecture-neutral:

Java programming language is neutral because there are no implementation-dependent features, for example, the size of primitive types is fixed.

High-performance:

Java is a more highly performed language than other programming languages because the bytecode is "close" to native code. It is still a little bit slower than compiled languages like C++ and Java is an interrupted language which is why it is slower than compiled languages, e.g. C, and C++.

Multi-threaded:

A thread is like a separate program, executing concurrently. We can write Java programs that deal with many tasks at once by defining multiple threads. The main advantage of multi-threading is that it doesn't occupy memory for each thread. it shares a common memory area. Threads are important for multimedia, web applications, etc.

Dynamic:

Java is a dynamic language. It supports the dynamic loading of classes. It means classes are loaded on demand. It also supports functions from its native languages, like  C, and C++. Java supports dynamic compilation and automatic memory management (garbage collections)

JVM(Java virtual machine):

Jvm(Java virtual machine) is an abstract machine. JVM is a virtual machine for Java programming languages that will provide a runtime environment where Java bytecode can be executed. 

Functions of JVM:

1. Loads code 

1. verifies code 

1. Executes code 

1. will provide a runtime environment 

JRE(Java runtime environment):

JRE stands for Java runtime environment 
JRE is the software used to build Java applications 
Java is a computer language that powers many current web and mobile applications. 
The JRE is the underlying technology that communicates between the Java program and the operating system.

JDK(Java development kit):

JDK stands for Java Development Kit. The Java Development Kit (JDK) is a software development environment that is used to develop Java applications and applets. It physically exits. It contains JRE + development tools. 
JDK helps in the implementation of the Java language and it is developed by the Oracle corporation:

Conclusion:

  Java is an Object-Oriented Programming Language

 Java is a Popular Programming Languages  Introduced in 1995 and is now owned by Oracle(a Software Company)      

Now, More Than 3 Billion devices run Java               

It is used for many applications like;

Web Applications, Mobile Applications, Gaming Applications, Business Applications, Scientific Applications etc

Java is also used in Framework in Android applications and many With only these languages you can learn the total Software World
Net Beans IDE is free and open-source 
It supports many Languages in Java one of them
Mainly Net beans are well suitable for Java so, most people use Net Beans for Java
Uses two-tier architecture:
 E,g: client, serve Architecture
Helps to build Enterprise level applications 
e.g. web applications and etc...

Net Beans is an integrated development environment (IDE) for java 

java Includes Java Enterprise Edition(J2EE)

It contains Database connectivity, Web Services, Servlets, JSP, EJB, etc