How applet is different from desktop applications?

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 The main difference between Applet and Application is that the applet is a small java program that can be executed by a Java-compatible web browser while the application is a standalone program that can directly run on the machine. 

The major difference between both of these is that an application is a standalone program that can run independently whereas an applet can run on a java compatible web browser only.  An application has access to all the resources on a system while an applet does not have any access to the resources on a system.

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In this post, we will understand the difference between Applet and Application.
Application
  • They are similar to Java programs.
  • They can be executed independently without using web browser.
  • It requires a 'main' function for it to be executed.
  • Java applications have full access to local file system and network.
  • They can access all kinds of resources that are available to the system.
  • They can execute the programs with the help of the local system.
  • An application program is required when a task needs to be directly performed for the user.
Applets
  • They are small Java programs.
  • They have been designed to be included with HTML documents.
  • They need Java-enabled web browser to be executed.
  • It doesn't need a main function to get  executed.
  • It doesn't have local disk and network access.
  • It can access the browser specific services only.
  • They can't access the local system.
  • They can't execute programs from local machines.
  • It is required to perform small tasks or it can be used as a part of a task.

Main Differences Between Application and Applet

  • Applications are large programs, whereas applets are smaller programs.
  • Applications are standalone programs that can run independently and do not need a web browser. On the other hand, applets are embedded within an HTML page and need a java compatible web browser to run.
  • For the execution of applications, main method() is required. On the other hand, for the execution of applets  inti() is required
  • Applications are able to access all the data, information, folder and file that are available on the system whereas applets do not have access to any data, information, folder and file that are available on the system.
  •  Applications do not require much security, since they are trusted programs. On the other hand, applets require high-security since they are not trusted programs.
  • Applications do not require any Graphical User Interface (GUI) to run, whereas Appltes have to run with a Graphical User Interface (GUI).

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Key Differences Between Applet and Application

  • Lets understand the difference between applet and application through the given points:
  • Applets are not entirely featured application programs and are usually written to achieve a small task or part of it. On the other hand, an Application is a program which runs on an underlying operating system. These are generic in a sense and designed to perform a specific task directly for the user.
  • An applet does not use the main() method. Instead, it automatically calls defined methods after loading, for Applet class to start and execute the applet code. On the contrary, Application uses main() method for initiating the execution of the code.
  • Dissimilar to the stand-alone application, the independent execution of an applet is not possible. They are run from inside a web page using a special feature known as HTML tag.
  • Applets cannot write to and read from the files in the local computer. While Application can perform such operation to the files in the local computer.
  • Prior installation is not required in an applet. As against, Prior explicit installation is necessarily needed while using an Application.
  • Constraints are imposed on applets for using libraries from other languages and also local files. Whereas Application can access libraries as well as local files.
  • An application can run several programs from the local computer. In contrast, Applets can not do so.


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