PPT 3.pptx For Java.....................
- 1. Java
- 2. Index: • Introduction • History • Java Versions
- 3. Introduction Java is a versatile and widely-used programming language which was developed by James Gosling at Sun Microsystems in the year 1995.It is platform independent language, readability, and object-oriented nature.
- 4. History Firstly, it was called "Greentalk" by James Gosling, and the file extension was .gt. After that, it was called Oak and was developed as a part of the Green project In 1995, Oak was renamed as "Java" because it was already a trademark by Oak Technologies.
- 5. Features of Java: • Simple • Object-Oriented Platform • Independent • High Performance • Portable • Dynamic
- 6. Java Basics 6 How Java Works • Java's platform independence is achieved by the use of the Java Virtual Machine • A Java program consists of one or more files with a .java extension • these are plain old text files • When a Java program is compiled the .java files are fed to a compiler which produces a .class file for each .java file • The .class file contains Java bytecode. • Bytecode is like machine language, but it is intended for the Java Virtual Machine not a specific chip such as a Pentium or PowerPC chip
- 7. Java Version History There are many java versions: • JDK Alpha and Beta (1995) • JDK 1.0 (23rd Jan, 1996) • JDK 1.1 (19th Feb, 1997) • J2SE 1.2 (8th Dec, 1998) • J2SE 1.3 (8th May, 2000) • J2SE 1.4 (6th Feb, 2002) • J2SE 5.0 (30th Sep, 2004) • Java SE 6 (11th Dec, 2006) • Java SE 7 (28th July, 2011)
- 8. save a program: Filename.java To compile: javac Filename.java To execute: java Filename
- 9. Thank You