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Difference Between a Java Application and a Java Applet

Java Application Vs. Java Applet: Know the Difference Between a Java Application and a Java Applet

Both of these are Java programs, but there is a significant difference between a Java application and a Java applet. The execution of the Java application begins with the main() method. On the other hand, the applet initializes through the init(). It does not use the main() method.

The applications of Java are types of stand-alone programs that directly perform various general operations for their users. These do not require any APIs or browsers enabled by Java. Conversely, the applets serve as small programs that one can easily transmit across the internet. A web browser that is Java-compatible can execute these applets.

The hardware or the operating system (OS) of the users’ devices do not affect the Java applets. If the browser of the concerned system has a properly installed JVM, then it can run easily with the help of these JVMs. Also, the overall feel and look of the Java applications remain the same on various OS.

What is a Java Application?

It is basically like the Java program, and it runs on an underlying OS (operating system) that gets support from the virtual machine. Java applications are also known as application programs.

A Java application does not necessarily require a graphical user interface for executing a Java application. It can easily run without it.

Features of Java application:

  • These are very similar to the Java programs.
  • You can independently execute these without making use of the web browser.
  • The execution of these apps requires a main function.
  • A Java application is capable of executing various programs via the local system.
  • The applications have full access to the local file systems and also networks.
  • A user needs an application program when they need to perform a task directly.

What is a Java Applet?

It is a type of Java program that a user can easily embed in a web page. A Java applet works at the client-side, and it runs inside the browser (web browser). One can use the OBJECT or the APPLET tag for embedding an applet into an HTML page and host it on any web server. The applets also serve the purpose of making a website more entertaining and dynamic.

Features of Java applet:

  • A Java applet is a small Java program.
  • One can easily include a Java applet along with various HTML documents.
  • Execution of these applets does not require any main function.
  • One needs a web browser (Java-based) for the execution of the applets.
  • They don’t have any network access or local disk.
  • These can only access the services that are browser-specific.
  • These can’t perform the execution of the programs from the local machines.
  • A Java applet cannot establish any access to the local system.
  • One requires a Java applet for performing small tasks. Conversely, it can also serve as a part of any task.

Difference Between a Java Application and a Java Applet

Parameters

Java Application

Java Applet

Meaning and Basics A Java Application is a type of program that can get independently executed on a computer. A Java Applet is a small program that makes use of another application program so that we can execute it.
Main() Method The execution of the Java application begins with the main() method. The usage of the main() is a prerequisite here. The Java applet initializes through the init(). It does not require the usage of any main() method.
Execution It cannot run alone, but it requires JRE for its execution. It cannot run independently but requires APIs for its execution (Ex. APIs like Web API).
Installation One needs to install a Java application priorly and explicitly on a local computer. A Java applet does not require any prior installation.
Communication among other Servers It is possible to establish communication with the other servers. It cannot really establish communication with the other servers.
Read and Write Operations The Java applications are capable of performing the read and write operations on various files present in a local computer. A Java applet cannot perform these applications on any local computer.
Restrictions These can easily access the file or data present in a computer system or device. These cannot access the file or data available on any system or local computers.
Security Java applications are pretty trusted, and thus, come with no security concerns. Java applets are not very trusted. Thus, they require security.

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