The source file's name must be the class name with a. A Java application is a class (a type of object-collection of data and methods). Use a text editor to create the Java source file. For servlets, you simply place them in a specific directory and insert HTML code to refer to the servlets.
You use the java interpreter to run standalone programs and appletviewer to test applets. Whether you write a standalone application or an applet or a servlet, the basic steps are similar except for the last step when you execute the program. To develop servlets, you need the Java 2 Enterprise Edition. Java servlet-This is a Java class loaded and executed by a Web server (or a server that helps the Web server such as the Apache Tomcat server). As a Webmaster, you'll mostly write Java applets. You have to first embed the applet inside an HTML document using the tag and then load that HTML document to activate the applet. Java applet-This is a Java class that can be loaded and executed by the appletviewer program or by a Java-capable Web browser. General-purpose Java applications take the form of standalone applications. The application has a main method and the java interpreter can run the application. A Java standalone application is just like the standalone C or C++ programs that you might know. Standalone Java application-This is a Java program that can be executed by a Java interpreter. However, before I proceed, I should point out the difference between three types of Java programs: In the grand old tradition of C programming books, I'll begin by showing you how to display "Hello, World!" from a Java program.
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