Java – Introduction


  • Java developed by James Gosling.
  • Using Java, we can develop Desktop applications and Web applications.
  • Using Core concepts of Java,
    • We develop Desktop applications.
  • Using Java technologies (Servlets, JDBC and JSP)
    • We develop Web based applications.
  • Using Frameworks (Spring, Hibernate, SpringBoot etc)
    • We achieve Rapid applications development.

Java distributions:

  • JSE(Java Standard Edition):  contains the core concepts of Java by which we can develop Desktop applications.
  • JEE(Java Enterprise Edition): contains advanced concepts of Java to develop Server side applications.
  • JME(Java Micro Edition): concepts used to develop mobile applications, embedded systems etc.

Java is a platform independent language:

  • Java Compiler converts the Source program into Byte code format file.
  • Byte code can run on any OS, hence java applications become platform independent.

Java is an Object-Oriented language:

  • Object oriented programming is a way of organizing programs as collection of objects, each of which represents an instance of a class.
  • Four main concepts of OOPS:
    • Abstraction
    • Encapsulation
    • Inheritance
    • Polymorphism


  • Java supports multithreading.
  • Multithreading is a Java feature that allows concurrent execution of two or more parts of a program for maximum utilization of CPU.
Scroll to Top