I  am Jay Kishan Mahato , a student curious to learn about  computer technology/application , and fasinated to share my knowledge and information to next generation .

 Well expertise in teaching Java to grade 9-12 ICSE

Along with this I also tech other computer langusges such as css , python , my sql , django .

Degree: Bachelors of Computer Application - University: Arka jain university

Degree:

Java is a class-based, object-oriented programming language that is designed to have as few implementation dependencies as possible. It is intended to let application developers write once, and run anywhere (WORA), meaning that compiled Java code can run on all platforms that support Java without the need for recompilation. Java was first released in 1995 and is widely used for developing applications for desktop, web, and mobile devices. Java is known for its simplicity, robustness, and security features, making it a popular choice for enterprise-level applications.

JAVA was developed by James Gosling at Sun Microsystems Inc in the year 1995 and later acquired by Oracle Corporation. It is a simple programming language. Java makes writing, compiling, and debugging programming easy. It helps to create reusable code and modular programs. Java is a class-based, object-oriented programming language and is designed to have as few implementation dependencies as possible. A general-purpose programming language made for developers to write once run anywhere that is compiled Java code can run on all platforms that support Java. Java applications are compiled to byte code that can run on any Java Virtual Machine. The syntax of Java is similar to c/c++.

• Learning Objectives:
  • Java Terminology
  • Primary/ Main features of Java
  • Important points of Java
• Course Outline:

  Java Terminology
  Before learning Java, one must be familiar with these common terms of Java.

  1.  Java Virtual Machine(JVM):  This is generally referred to as JVM. There are three execution phases of a program. They are written, compile and run the program.

  Writing a program is done by a java programmer like you and me.
  The compilation is done by the JAVAC compiler which is a primary Java compiler included in the Java development kit (JDK). It takes the Java program as input and generates bytecode as output.
  In the Running phase of a program, JVM executes the bytecode generated by the compiler.
  Now, we understood that the function of Java Virtual Machine is to execute the bytecode produced by the compiler. Every Operating System has a different JVM but the output they produce after the execution of bytecode is the same across all the operating systems. This is why Java is known as a platform-independent language.

  2. Bytecode in the Development Process:  As discussed, the Javac compiler of JDK compiles the java source code into bytecode so that it can be executed by JVM. It is saved as .class file by the compiler. To view the bytecode, a disassembler like javap can be used.

  3. Java Development Kit(JDK): While we were using the term JDK when we learn about bytecode and JVM. So, as the name suggests, it is a complete Java development kit that includes everything including compiler, Java Runtime Environment (JRE), java debuggers, java docs, etc. For the program to execute in java, we need to install JDK on our computer in order to create, compile and run the java program.

   

  4. Java Runtime Environment (JRE): JDK includes JRE. JRE installation on our computers allows the java program to run, however, we cannot compile it. JRE includes a browser, JVM, applet support, and plugins. For running the java program, a computer needs JRE.

  5. Garbage Collector: In Java, programmers can’t delete the objects. To delete or recollect that memory JVM has a program called Garbage Collector. Garbage Collectors can recollect the objects that are not referenced. So Java makes the life of a programmer easy by handling memory management. However, programmers should be careful about their code whether they are using objects that have been used for a long time. Because Garbage cannot recover the memory of objects being referenced.

  6. ClassPath: The classpath is the file path where the java runtime and Java compiler look for .class files to load. By default, JDK provides many libraries. If you want to include external libraries they should be added to the classpath.

  Primary/Main Features of Java
  1. Platform Independent: Compiler converts source code to bytecode and then the JVM executes the bytecode generated by the compiler. This bytecode can run on any platform be it Windows, Linux, or macOS which means if we compile a program on Windows, then we can run it on Linux and vice versa. Each operating system has a different JVM, but the output produced by all the OS is the same after the execution of the bytecode. That is why we call java a platform-independent language.

  2. Object-Oriented Programming Language: Organizing the program in the terms of a collection of objects is a way of object-oriented programming, each of which represents an instance of the class.

  The four main concepts of Object-Oriented programming are:

  Abstraction
  Encapsulation
  Inheritance
  Polymorphism
  3. Simple:  Java is one of the simple languages as it does not have complex features like pointers, operator overloading, multiple inheritances, and Explicit memory allocation. 

  4. Robust:  Java language is robust which means reliable. It is developed in such a way that it puts a lot of effort into checking errors as early as possible, that is why the java compiler is able to detect even those errors that are not easy to detect by another programming language. The main features of java that make it robust are garbage collection, Exception Handling, and memory allocation.

  5. Secure:  In java, we don’t have pointers, so we cannot access out-of-bound arrays i.e it shows Array Index Out Of Bound Exception if we try to do so. That’s why several security flaws like stack corruption or buffer overflow are impossible to exploit in Java. Also, java programs run in an environment that is independent of the os(operating system) environment which makes java programs more secure.

  6. Distributed:  We can create distributed applications using the java programming language. Remote Method Invocation and Enterprise Java Beans are used for creating distributed applications in java. The java programs can be easily distributed on one or more systems that are connected to each other through an internet connection.

  7. Multithreading:  Java supports multithreading. It is a Java feature that allows concurrent execution of two or more parts of a program for maximum utilization of the CPU.

• Recomended Audience:

   Anyone having a basic knowledge of logic, maths and computers and keen to learn can start learning Java.

• Pre-Requisite Requirement:

  For attending this class, Basic pre-requisite requirement is having interest in learning of that class. Without having natural interest on particular topic/class, it's not meaningful to proceed with it along with Instructors. So, it's advisable to have these as a part of your learning phase of your life if you are really inclined and motivated to learn that.

• Course Level:
  Beginner
• Language of Teaching:
  English, Hindi
• Class Schedule Availiability:
  Morning, Afternoon, Evening