Displaying HTML documents and accessing the web - An Introduction to Graphical User Interfaces with Java Swing - page 259

constructor. A URL is a web address. One can use class URL for this purpose, or
one can just pass on the URL as a string. The constructors have the following
form:

JEditorPane(URL webAddress)
JEditorPane(String webAddressAsString)
These constructors have to be embedded into a try-catch block, because gener-
ating a URL can throw an exception. To access a local file, the URL has to start
with file:/// instead of http:// .Weuse a local file in our example because
then the program works without a connection to the Internet. If the computer is
connected to the Internet, one can use the following URL:

http://www.imm.dtu.dk/swingbook/HTMLTest/test1.html

We are only interested in displaying HTML and do not allow the text to be edited
using method setEditable(false) of JEditorPane .

File: its/HTML/SimpleHTMLFrame.java

package its.HTML; 1.

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import its.SimpleFrame.SimpleFrame;

import javax.swing.JEditorPane; 4.

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public class SimpleHTMLFrame extends SimpleFrame

{ 7.

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private JEditorPane ediPane;

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private static String htmlSource = "/its/TestData/test1.html";

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private static String workingDir;

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public SimpleHTMLFrame(String URLname)

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{

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this .setSize(400,400);

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workingDir = System.getProperty("user.dir");

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// in the following we assume that the program

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// is run from the parent directory of its.

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// Use an absolute path if necessary:

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try {

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ediPane = new JEditorPane("file:///"+workingDir+htmlSource);

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// ediPane = new JEditorPane
(”file:///C:/absolute/path//its/TestData/

ediPane.setEditable( false ); 22.

} catch (Exception e){} 23.

// Later, the code for the link listener will be added here. 24.

this .getContentPane().add(ediPane); 25.

} 26.

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