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Figure 4 shows the initial output from running this program. Note the vertical scroll bar on the right side of the image.

Figure 4 - JFrame output from the program named Java4655a.

Missing image

What's missing?

There are at least three features that we would need to add to turn this program into asimple but functional web browser.

  • A way for the user to enter the website of interest and to change it at will.
  • A "Back" button.
  • A "Forward" button.

Adding these features is not particularly difficult, but I will leave it as an exercise for the student to add these features andconvert this program into a functional web browser.

Run the program

I encourage you to copy the code from Listing 11 , Listing 12 , and Listing 13 . Compile the code and execute it. Experiment with the code,making changes, and observing the results of your changes. Make certain that you can explain why your changes behave as they do.

What's next?

The next module will introduce sockets for network programming.


This section contains a variety of miscellaneous information.

Housekeeping material
  • Module name: Java4655: A Rendering Web Browser
  • File: Java4655.htm
  • Published: 03/02/14
  • Revised: 02/07/16

Financial : Although the Connexions site makes it possible for you to download a PDF file for thismodule at no charge, and also makes it possible for you to purchase a pre-printed version of the PDF file, you should beaware that some of the HTML elements in this module may not translate well into PDF.

I also want you to know that, I receive no financial compensation from the Connexions website even if you purchase the PDF version ofthe module.

In the past, unknown individuals have copied my modules from cnx.org, converted them to Kindle books, and placed them for sale on Amazon.com showing me as the author. Ineither receive compensation for those sales nor do I know who does receive compensation. If you purchase such a book, please beaware that it is a copy of a module that is freely available on cnx.org and that it was made and published withoutmy prior knowledge.

Affiliation : I am a professor of Computer Information Technology at Austin Community College in Austin, TX.

Complete program listing

Listing 11 - The program named Java4655c.

/*File Java4655c.java Copyright 2014, R.G.BaldwinRev 01/07/14 This is a skeleton program that illustrates how to loada web page into a JEditorPane and illustrates how to identify the three types of hyperlink events:ENTERED EXITEDACTIVATED **********************************************************/import javax.swing.*; import javax.swing.event.*;import javax.swing.text.html.*; import java.net.*;import java.awt.*; class Java4655c{public static void main(String[]args){ new Java4655c().runner("http://www.austincc.edu/baldwin"); }//end main//-----------------------------------------------------//void runner(String webSiteLink){ try{//Create a new URL object from the website string URL website = new URL(webSiteLink);//Instantiate an overall web page handler new Java4655cHtmlHandler(website);}catch(Exception e){ e.printStackTrace();}//end catch }//end runner}//end class Java4655c //=======================================================//class Java4655cHtmlHandler extends JFrame implements HyperlinkListener{//Constructor public Java4655cHtmlHandler(URL website) {setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); setTitle("Copyright 2014, R.G.Baldwin");try{ if(website != null) {//Create a JEditorPane containing the web page. JEditorPane html = new JEditorPane(website);html.setEditable(false);//Register a listener to listen for hyperlink // events.html.addHyperlinkListener(this); //Display the JEditorPanethis.getContentPane().add(html); this.setSize(669,669);this.setVisible(true); }//end if}catch(Exception e){ e.printStackTrace();}//end catch }//end constructor//-----------------------------------------------------// //This hyperlink event listener simply displays the// type of event on the command-line screen. public void hyperlinkUpdate(HyperlinkEvent e) {if (e.getEventType() == HyperlinkEvent.EventType.ENTERED){System.out.println("ENTERED"); }else if (e.getEventType() ==HyperlinkEvent.EventType.EXITED){ System.out.println("EXITED");}else if (e.getEventType() == HyperlinkEvent.EventType.ACTIVATED){System.out.println("ACTIVATED"); }//end if}//end hyperlinkUpdate method //------------------------------------------------------//}//end class Java4655cHtmlHandler

Questions & Answers

Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
what school?
biomolecules are e building blocks of every organics and inorganic materials.
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
sciencedirect big data base
Introduction about quantum dots in nanotechnology
Praveena Reply
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
do you think it's worthwhile in the long term to study the effects and possibilities of nanotechnology on viral treatment?
Damian Reply
absolutely yes
how to know photocatalytic properties of tio2 nanoparticles...what to do now
Akash Reply
it is a goid question and i want to know the answer as well
characteristics of micro business
for teaching engĺish at school how nano technology help us
Do somebody tell me a best nano engineering book for beginners?
s. Reply
there is no specific books for beginners but there is book called principle of nanotechnology
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
fullerene is a bucky ball aka Carbon 60 molecule. It was name by the architect Fuller. He design the geodesic dome. it resembles a soccer ball.
what is the actual application of fullerenes nowadays?
That is a great question Damian. best way to answer that question is to Google it. there are hundreds of applications for buck minister fullerenes, from medical to aerospace. you can also find plenty of research papers that will give you great detail on the potential applications of fullerenes.
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
Mostly, they use nano carbon for electronics and for materials to be strengthened.
is Bucky paper clear?
carbon nanotubes has various application in fuel cells membrane, current research on cancer drug,and in electronics MEMS and NEMS etc
so some one know about replacing silicon atom with phosphorous in semiconductors device?
s. Reply
Yeah, it is a pain to say the least. You basically have to heat the substarte up to around 1000 degrees celcius then pass phosphene gas over top of it, which is explosive and toxic by the way, under very low pressure.
Do you know which machine is used to that process?
how to fabricate graphene ink ?
for screen printed electrodes ?
What is lattice structure?
s. Reply
of graphene you mean?
or in general
in general
Graphene has a hexagonal structure
On having this app for quite a bit time, Haven't realised there's a chat room in it.
what is biological synthesis of nanoparticles
Sanket Reply
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