لطفا منتظر باشید ...
• Table of Contents• Index• Reviews• Reader Reviews• Errata• AcademicJava Network Programming, 3rd EditionBy
Elliotte Rusty Harold Publisher: O'ReillyPub Date: October 2004ISBN: 0-596-00721-3Pages: 706
Thoroughly revised to cover all the 100+ significant updates
to Java Developers Kit (JDK) 1.5, Java Network
Programming is a complete introduction to
developing network programs (both applets and applications)
using Java, covering everything from networking fundamentals
to remote method invocation (RMI). It includes chapters on
TCP and UDP sockets, multicasting protocol and content
handlers, servlets, and the new I/O API. This is the
essential resource for any serious Java developer.
8.1 HTML on Components
Most text-based Swing components,
such as labels, buttons, menu items, tabbed panes, and tool tips, can
have their text specified as HTML. The component will display it
appropriately. If you want the label on a JButton
to include bold, italic, and plain text, the simplest way is to write
the label in HTML directly in the source code like this:
JButton jb = new JButton("<html><b><i>Hello World!</i></b></html>");The same technique works for JFC-based labels, menu items, tabbedpanes, and tool tips. Example 8-1 and Figure 8-1 show an applet with a multiline
JLabel that uses HTML.
Example 8-1. Including HTML in a JLabel
import javax.swing.*;
public class HTMLLabelApplet extends JApplet {
public void init( ) {
JLabel theText = new JLabel(
"<html>Hello! This is a multiline label with <b>bold</b> "
+ "and <i>italic</i> text. <P> "
+ "It can use paragraphs, horizontal lines, <hr> "
+ "<font color=red>colors</font> "
+ "and most of the other basic features of HTML 3.2</html>");
this.getContentPane( ).add(theText);
}
}
Figure 8-1. An HTML label
supported, at least partially, including IMG and
the various table tags. The only completely unsupported HTML 3.2 tags
are <APPLET>,
<PARAM>, <MAP>,
<AREA>, <LINK>,
<SCRIPT>, and
<STYLE>. The various frame tags (technically
not part of HTML 3.2, though widely used and implemented) are also
unsupported. In addition, the various new tags introduced in HTML 4.0
such as BDO, BUTTON,
LEGEND, and TFOOT, are
unsupported.Furthermore, there are some limitations on other common tags. First
of all, relative URLs in attribute values are not resolved because
there's no page for them to be relative to. This
most commonly affects the SRC attribute of the
IMG element. The simplest way around this is to
store the images in the same JAR archive as the applet or application
and load them from an absolute jar URL. Links
will appear as blue underlined text as most users are accustomed to,
but nothing happens when you click on one. Forms are rendered, but
users can't type input or submit them. Some CSS
Level 1 properties such as font-size are supported
through the style attribute, but
STYLE tags and external stylesheets are not. In
brief, the HTML support is limited to static text and images. After
all, we're only talking about labels, menu items,
and other simple components.
