What is java applet and application

9 Difference between Applet and Application in Java

In this article, I will be explaining the complete difference between Applet and Application in Java along with coding examples. Before this, let’s see the definition of Java applet and application.

What is Java Applet?

An applet is a small application that performs specific operations or functions. It is a utility program that is loaded from the webserver and executed by the web browser.

Applets are designed to be embedded within the HTML page, thereby, providing functionalities that a simple HTML page cannot provide.

What is an Application in Java?

A Java application is a standalone java program that runs on a client or server.

It is a program that runs on itself as and when the main() method of any specific class is executed. An application has a functionality that benefits the user or some other java application.

Still confused? Let’s see the differences…

Difference between Applet and Application in Java:

In other words, how is Java Applet different from Java Application?

The major differences between an applet and an application in JAVA are as follows:

Sr.No.	Characteristic	Java Application	Java Applet
1.	Definition	An application is a standalone Java program that can be run independently on a client/server without the need for a web browser.	An applet is a form of Java program which is embedded with an HTML page and loaded by a web server to be run on a web browser.
2.	main() method	The execution of the program starts from the main() method.	There is no requirement of main() method for the execution of the program.
3.	Access Restrictions	The application can access local disk files/ folders and the network system.	The applet doesn’t have access to the local network files and folders.
4.	GUI	It doesn’t require any Graphical User Interface (GUI).	It must run within a GUI.
5.	Security	It is a trusted application and doesn’t require much security.	It requires high-security constraints as applets are untrusted.
6.	Environment for Execution	It requires Java Runtime Environment (JRE) for its successful execution.	It requires a web browser like Chrome, Firefox, etc for its successful execution.
7.	Installation	It is explicitly run and installed on a local system. An applet doesn’t have access to local files and so it cannot perform read and write operations on files stored on the local disk.	It doesn’t require any explicit installation to be done.
8.	Read/ Write Operation	An application can perform read and write operations on files stored on the local disk.	An applet doesn’t have access to local files so you cannot perform read and write operations on files stored on the local disk.

Examples [Java Applet Vs Application]:

Here are examples of Java application and applet. You can test these programming codes by running them on your system.

Java Application Code Example:

public class MyApplication < public static void main(String args[ ]) < System.out.println("Hello, Welcome to csestack.org"); >>

Java Applet Code Example:

import java.awt.*; import java.applet.*; public class Myclass extends Applet < public void init() < >public void start() < >public void stop() <> public void destroy() <> public void paint(Graphics g) <> >

Java Applications and Java Applets in perspective with Java are two varied types of programs that are different in function. But both have their own particular usage and magnitude.

Further Reading:

Hope this difference between Applet and Application in Java clears your doubt. If you have any questions, you can ask me by commenting below.

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What is the Difference Between Applet and Application?

In this article, we will understand the Difference between an Applet and an Application in Java. Before understanding the Difference between an Applet and an Application in Java, let us know what they mean. Java application is like any Java program which can be executed on a machine without any other application. It can be used without any GUI (Graphical User Interface).

While on the other hand, a Java applet is a program that can be run on a Java-supported browser. Java applets are embedded with the help of HTML. Therefore, Java applets are generally used for Graphical purposes.

Java Application

Java application is a Java program that is stand-alone, i.e. it does not require a web browser to run. It uses JVM (Java Virtual Machine) to compile and run the code. It uses the resources of the system using the Java security model, and it is generally stored in the system where it is running. It creates .class files. A Java application requires a main() method for its execution. main() method calls for other required methods. It can read and write the local files of the system.

Features of Java Application :

• It is a Java program and requires a main() method for its execution.
• It has full access to the local storage as well as the network of the system where it is executed.
• It is trusted by the Operating System.
• It does not require any applications such as web browsers for its execution.

Sample Code for a Java Application

Example — 1 :
Let’s say that we want to design a Java application that adds 2 numbers.

Java Applet

A Java applet is a Java program that can be embedded in an HTML website. It runs inside the web browser. An HTML website uses the tag to use it. It does not have the access to all the resources of the system like local storage, and thus it can not read and write files on the system without permission. It does not require a main() method. For running the Applet code, a Java-supported web browser uses the Java Virtual Machine of the system to compile the code and then run it. A Java applet executes methods in this sequence : init() , start() and paint() . It does not need all these methods, but if there are multiple methods then it follows the sequence.

Sample Code for a Java Applet

Example — 1 :
Let’s say that we want to design a Java applet that displays any message.

To see how this applet runs, we need to embed it into an HTML file. We will use the applet tags.

Let us see the code for the same :

To run the applet, we will have to compile the java file using the javac in the terminal/command prompt.

We will run the following command :

Remember :
Modern Chrome and Firefox browsers do not support Java. To use this Java Applet, we will have to use some java supported browser or we can use the appletviewer. In this article, we will use the appletviewer.

Command to run in terminal/command prompt :

Features of Java Applet :

• It requires a Java-supported web browser for its execution.
• All the Java applets are a sub-class of the java.applet.Applet class.
• main() method is not required
• it follows this sequence while executing methods : init() , start() , paint() and then other methods.
• Termination of a Java applet is done by stop() and destroy() methods.
• It is used to display dynamic content.
• They do not have access to local storage.
• The Operating System does not completely trust Java applets.

Difference between an Applet and an Application in Java

Let us differentiate Java Applications and Java Applets

Java Application	Java Applet
A Java Application is a Java program that runs on the system with the help of JVM.	A Java Applet is a program that runs on a Java-supported web browser. Java applets are used to implement in HTMLs.
For executing a Java application we require a main() method that calls other methods or it has other instructions.	For executing a Java applet, we do not need a main() method, instead for Java applets we have methods such as init() , start() , and paint() to initiate the program.
Java applications are compiled and executed with the help of the Java compiler (Java virtual machine).	Java applets are compiled with the help of Java Compiler and executed with the help of a Java-supported web browser.
A Java application has full access to the local files of the system and the network.	A Java applet has no access to the local files of the system or the network.
For the execution of Java Application, it needs to be saved in the file system of the computer.	For executing a Java applet, we do not need to save it in the file system.
It needs JRE (Java Runtime Environment) to execute.	It just needs a Java-supported web browser to execute.
It can read and write local files on the system.	It can not read or write local files of the system.
Java applications are trusted by the system and therefore they can access the data of the system without any interference.	Java applets are not trusted by the system, and therefore, they experience security boundations.
We can make Java applications that can add 2 numbers.	We can make Java applets which can display messages.!

Conclusion

Difference between an Applet and an Application in Java :

• Java applications are programs that run on a system without any web browser.
• Java Applets are the programs that need a Java-supported web browser for their execution.
• Java applets are implemented in HTML.
• Java applications need main() method for its execution and Java applets need init() , start() or paint() methods.
• Java applications are trusted by the system and thus they have storage access to the system, while Java applets do not have storage access as they are not trusted programs.
• Java applications need to be saved on the system to execute, and Java applets do not need to be saved on the system for execution.

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What are the differences between an application and an applet in Java?

A Java program can be classified into two types, one is an Application and another is an Applet.

Application

• An application is a stand-alone java program that runs with the support of a virtual machine in a client or server-side.
• A java application is designed to perform a specific function to run on any Java-compatible virtual machine regardless of the computer architecture.
• An application is either executed for the user or for some other application program.
• Examples of java applications include database programs, development tools, word processors, text and image editing programs, spreadsheets, web browsers, etc.

Example

Output

Welcome to TutorialsPoint

Applet

• An applet is specifically designed to be executed within an HTML web document using an external API.
• They are basically small programs, more like the web version of an application that requires a Java plugin to run on the client browser.
• Applets run on the client-side and are generally used for internet computing.
• When we see an HTML page with an applet in a Java-enabled web browser, the applet code gets transferred to the system and is finally run by the Java-enabled virtual machine on the browser.

Example

import java.awt.*; import java.applet.*; public class AppletDemo extends Applet < public void paint(Graphics g) < g.drawString("Welcome to TutorialsPoint", 50, 50); >> /* */

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