What is applet in java language?
An applet is a Java program that runs in a Web browser. An applet can be a fully functional Java application because it has the entire Java API at its disposal.
There are some important differences between an applet and a standalone Java application, including the following −
An applet is a Java class that extends the java.applet.Applet class. A main() method is not invoked on an applet, and an applet class will not define main(). Applets are designed to be embedded within an HTML page. When a user views an HTML page that contains an applet, the code for the applet is downloaded to the user's machine.
A JVM is required to view an applet. The JVM can be either a plug-in of the Web browser or a separate runtime environment. The JVM on the user's machine creates an instance of the applet class and invokes various methods during the applet's lifetime. Applets have strict security rules that are enforced by the Web browser. Other classes that the applet needs can be downloaded in a single Java Archive (JAR) file.
Applet is a Java program that can be embedded into a web page. It runs inside the web browser and works at client side.
Applets are used to make the web site more dynamic and entertaining.
All applets are sub-classes of java.applet.Applet Applet (Java Platform SE 7 )class.
Execution of an applet does not begin at main() method.
Features of Applets are
1.Displaying dynamic web pages of a web application.
2.Playing sound files
An applet may be invoked by embedding directives in an HTML file and viewing the file through an applet viewer or Java-enabled browser.
Issues with Java applets:
- Security: Java resolves the security issue by restricting applets to Java’s execution environment and preventing access to system resources.
- Portability: Portability is defined as the applet’s ability to run on different computers and operating systems.