Introduction for java

Java is a programming language distinct from the markup scheme for defining hypertext, the Hypertext Markup Language (HTML). Java doesn't compete with or replace HTML, nor does it negate the work done creating content using HTML for the Web.
When it was released in the spring of 1995 by Sun Microsystems, Java unleashed a level of interactivity on the Web that had never been possible before. Java makes the Web interactive.
Java connects with HTML and the Web through a special HTML element called APPLET, which allows developers to include Java programs called applets on Web pages. These applets are essentially software programs that the user's browser downloads (automatically, as part of Web page observation) and executes. With real-time graphical input and output possible through the applet on the page, Java thus opens windows to into richer levels of interactivity and visualization.