ArtsAutosBooksBusinessEducationEntertainmentFamilyFashionFoodGamesGenderHealthHolidaysHomeHubPagesPersonal FinancePetsPoliticsReligionSportsTechnologyTravel

Java Applets

Updated on December 31, 2016

Java is a fully machine independent language. This means that, the programs developed in java can virtually work on any machine in any part of the world without the need for rewritten or recompiling. This feature of java makes it one of the ideal languages to be used on the internet. Java program code can be embedded into the hypertext code of any web page to add sound, animation, multimedia effects and much, much more to the page. This page, could then be viewed by any internet user, anywhere in the world, on any machine.

An introduction to Applets

Programs in java can be of two types.

1. Applications


An application is a java program, that can be run on your computer, using the JVM you have installed on it.

A Java applet is a java program that can be executed by a web browser. The browser has an inbuilt JVM that helps in executing these applets. The applets can also be executed tested using a utility available as part of JDK - the applet viewer.

Though an applet is also a java program,it is one important feature that makes it very different from a java program. An applet is a java program that can be used in a web page. So when the web page is viewed, the Java applet code is also downloaded and executed along with the HTML code in the page.

My First Java Applet

import java.applet.Applet;
import java.awt.Graphics;
Public class applet1 extends Applet
public void paint (Graphics g)
g.drawString("My first applet", 20, 100);

The first line of the applet imports the java.applet.Applet.class. The class is a the superclass of all applets. That is every applet created must be defined as a subclass of the Applet class.

Unlike an application, which uses I/O classes for user interaction, an applet uses the AWT for user interaction. The AWT included several very sophisticated classes that provide graphical interface. One of them is the Graphics class, which isimported, in the second line.

The next line, Line 3,declares a class applet1 as a subclass of the superclass Applet.

Line 5, calls the method paint().This method is defined by AWT and is used to display the output of the window. The paint() method accepts one argument of type Graphics. In the applet shown above, this object is g.

The next line calls another method drawString(). This method belongs to the Graphics class and is used to display a string in the applet window. The method accepts 3 arguments - the String message to be displayed, the x and y coordinates of the location where it has to be displayed. In the above example, the drawString() method will display the String "My first applet" at the location 20, 100.

How to run the applet program?

To do so, first key in the applet using any text editor. Save the file like you save any other java program with the extension .java. In this case, the name of the applet will be

Compile it with javac.


Next create another text file with the following code,

<applet code ="applet1 width=200 height=200>


Save the file with the extension .HTML, say test.html.

Once the applet has been successfully compiled and the corresponding HTML file created, it can be executed in two ways.

1. Using a web browser.

2. Using the appletviewer that is available as part of JDK.

To execute the applet using a web browser, start the web browser and open the file HTML file with File --> Open. When you do so, the browser executes the applet specified by the <applet>tag.

To execute using applet viewer, type the following command at the DOS prompt.

appletviewer test.html

There is a shortcut to executing applets using an appletview. Instead of creating a separate HTML file, the <applet> and </applet> tags can be included as comments in the applet code itself.

To execute this applet,



An applet does not need main() method.

AWT - Abstract window toolkit.

JVM - Java Virtual Machine.

Was this article usefull for you?

See results

Comment here

    0 of 8192 characters used
    Post Comment

    • profile image


      22 months ago

      Very use full


    This website uses cookies

    As a user in the EEA, your approval is needed on a few things. To provide a better website experience, uses cookies (and other similar technologies) and may collect, process, and share personal data. Please choose which areas of our service you consent to our doing so.

    For more information on managing or withdrawing consents and how we handle data, visit our Privacy Policy at:

    Show Details
    HubPages Device IDThis is used to identify particular browsers or devices when the access the service, and is used for security reasons.
    LoginThis is necessary to sign in to the HubPages Service.
    Google RecaptchaThis is used to prevent bots and spam. (Privacy Policy)
    AkismetThis is used to detect comment spam. (Privacy Policy)
    HubPages Google AnalyticsThis is used to provide data on traffic to our website, all personally identifyable data is anonymized. (Privacy Policy)
    HubPages Traffic PixelThis is used to collect data on traffic to articles and other pages on our site. Unless you are signed in to a HubPages account, all personally identifiable information is anonymized.
    Amazon Web ServicesThis is a cloud services platform that we used to host our service. (Privacy Policy)
    CloudflareThis is a cloud CDN service that we use to efficiently deliver files required for our service to operate such as javascript, cascading style sheets, images, and videos. (Privacy Policy)
    Google Hosted LibrariesJavascript software libraries such as jQuery are loaded at endpoints on the or domains, for performance and efficiency reasons. (Privacy Policy)
    Google Custom SearchThis is feature allows you to search the site. (Privacy Policy)
    Google MapsSome articles have Google Maps embedded in them. (Privacy Policy)
    Google ChartsThis is used to display charts and graphs on articles and the author center. (Privacy Policy)
    Google AdSense Host APIThis service allows you to sign up for or associate a Google AdSense account with HubPages, so that you can earn money from ads on your articles. No data is shared unless you engage with this feature. (Privacy Policy)
    Google YouTubeSome articles have YouTube videos embedded in them. (Privacy Policy)
    VimeoSome articles have Vimeo videos embedded in them. (Privacy Policy)
    PaypalThis is used for a registered author who enrolls in the HubPages Earnings program and requests to be paid via PayPal. No data is shared with Paypal unless you engage with this feature. (Privacy Policy)
    Facebook LoginYou can use this to streamline signing up for, or signing in to your Hubpages account. No data is shared with Facebook unless you engage with this feature. (Privacy Policy)
    MavenThis supports the Maven widget and search functionality. (Privacy Policy)
    Google AdSenseThis is an ad network. (Privacy Policy)
    Google DoubleClickGoogle provides ad serving technology and runs an ad network. (Privacy Policy)
    Index ExchangeThis is an ad network. (Privacy Policy)
    SovrnThis is an ad network. (Privacy Policy)
    Facebook AdsThis is an ad network. (Privacy Policy)
    Amazon Unified Ad MarketplaceThis is an ad network. (Privacy Policy)
    AppNexusThis is an ad network. (Privacy Policy)
    OpenxThis is an ad network. (Privacy Policy)
    Rubicon ProjectThis is an ad network. (Privacy Policy)
    TripleLiftThis is an ad network. (Privacy Policy)
    Say MediaWe partner with Say Media to deliver ad campaigns on our sites. (Privacy Policy)
    Remarketing PixelsWe may use remarketing pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to advertise the HubPages Service to people that have visited our sites.
    Conversion Tracking PixelsWe may use conversion tracking pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to identify when an advertisement has successfully resulted in the desired action, such as signing up for the HubPages Service or publishing an article on the HubPages Service.
    Author Google AnalyticsThis is used to provide traffic data and reports to the authors of articles on the HubPages Service. (Privacy Policy)
    ComscoreComScore is a media measurement and analytics company providing marketing data and analytics to enterprises, media and advertising agencies, and publishers. Non-consent will result in ComScore only processing obfuscated personal data. (Privacy Policy)
    Amazon Tracking PixelSome articles display amazon products as part of the Amazon Affiliate program, this pixel provides traffic statistics for those products (Privacy Policy)