Introduction to Java

In this topic, you will learn about, Introduction to Java.

  • Java is an object-oriented programming language.
  •  It is a general-purpose programming language intended to let application developers write once, run anywhere (WORA).
  • Java was originally developed by James Gosling at Sun Microsystems (Sun Microsystem is now acquired by Oracle) in 1995.
  • James Gosling is also called the Father of JAVA.
  • The current version of JAVA is Java 15.
  • JAVA released to the market in three categories J2SE (JAVA 2 Standard Edition), J2EE (JAVA 2 Enterprise Edition), and J2ME (JAVA 2 Micro/Mobile Edition).
  • J2SE is basically used for developing client-side applications/programs.
  • J2EE is used for developing server-side applications/programs.
  • J2ME is used for developing mobile applications and lower/system-level applications.
  • If you exchange the data between client and server programs (J2SE and J2EE), by default JAVA is having on internal support with a protocol called HTTP. To develop J2ME applications we must use a protocol called WAP (Wireless Applications Protocol).

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