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appletviewer - Java applet viewer
SYNOPSIS
appletviewer [ -debug ] [ -encoding encoding_name ]
[ -J javaoption ] urls ...
DESCRIPTION
The appletviewer command runs Java applets outside of the context of a World Wide Web browser.
The appletviewer command connects to the document(s) or resource(s) designated by urls and displays each applet
referenced by that document in its own window. Please note that if the documents referred to by urls do not ref-
erence any applets with the OBJECT, EMBED, or APPLET tag, appletviewer does nothing.
appletviewer Tags
The appletviewer makes it possible to run a Java applet without using a browser. appletviewer ignores any HTML
that is not immediately relevant to launching an applet. However, it recognizes a wide variety of applet-launch-
ing syntax. The HTML code that appletviewer recognizes is shown below. All other HTML code is ignored.
object The object tag is the HTML 4.0 tag for embedding applets and mult-media objects into an HTML page. It
is also an Internet Explorer 4.x extension to HTML 3.2 which allows IE to run a Java applet using the
latest Java plugin from Sun.
<object
width="pixelWidth"
height="pixelHeight"
>
<param name="code" value="yourClass.class">
<param name="object" value="serializedObjectOrJavaBean">
<param name="codebase" value="classFileDirectory">
...
alternate-text
</object>
Please note:
? appletviewer ignores the "classID" attribute, on the assumption that it is pointing to the Java plu-
gin, with the value:
classid="clsid:8AD9C840-044E-11D1-B3E9-00805F499D93"
? appletviewer also ignores the "codebase" attribute that is usually included as part of the object
tag, assuming that it points to a Java plugin in a network cab file with a value like:
codebase="http://java.sun.com/products/plugin/1.1/jinstall-11.cab#Version=1,1,0,0"
? The optional codebase param tag supplies a relative URL that specifies the location of the applet
class.
? Either code or object is specified, not both.
? The type param tag is not used by appletviewer, but should be present so that browsers load the plu-
gin properly. For an applet, the value should be something like:
<param name="type"
value="application/x-java-applet;version=1.1">
or
<param name="type" value="application/x-java-applet">
For a serialized object or JavaBean, the type param value should be something like:
<param name="type"
value="application/x-java-bean;version=1.1">
or
<param name="type" value="application/x-java-bean">
? Other param tags are argument values supplied to the applet.
? The object tag recognized by IE4.x and the embed tag recognized by Netscape 4.x can be combined so
that an applet can use the latest Java plugin from Sun, regardless of the browser that downloads the
applet.
? appletviewer does not recognize the java_code, java_codebase, java_object, or java_type param tags.
These tags are only needed when the applet defines parameters with the names code, codebase, object,
or type, respectively. (In that situation, the plugin recognizes and uses the java_ version in pref-
erence to the version that will be used by the applet.) If the applet requires a parameter with one
of these 4 names, it may not run in appletviewer.
embed The embed tag is the Netscape extension to HTML 3.2 that allows embedding an applet or a multimedia
object in an HTML page. It allows a Netscape 4.x browser (which supports HTML 3.2) to run a Java
applet using the latest Java plugin from Sun.
<embed
code="yourClass.class"
object="serializedObjectOrJavaBean"
codebase="classFileDirectory"
width="pixelWidth"
height="pixelHeight"
>
...
</embed>
Please note that:
? The object and embed tags can be combined so that an applet can use the latest Java plugin from Sun,
regardless of the browser that downloads the applet. For more information, see the Java PlugIn HTML
Specification
? Unlike the object tag, all values specified in an embed tag are attributes (part of the tag) rather
than parameters (between the start tag and end tag, specified with a param tag.
? To supply argument values for applet parameters, you add additional attributes to the <embed> tag.
? appletviewer ignores the "src" attribute that is usually part of an <embed> tag.
? Either code or object is specified, not both.
? The optional codebase attribute supplies a relative URL that specifies the location of the applet
class.
? The type attribute is not used by appletviewer, but should be present so that browsers load the plu-
gin properly. For an applet, the value should be something like:
<type="application/x-java-applet;version=1.1">...
or
<type="application/x-java-applet">...
For a serialized object or JavaBean, the type param value should be something like:
<type="application/x-java-bean;version=1.1">...
or
<type="application/x-java-bean">...
? The pluginspage attribute is not used by appletviewer, but should be present so that browsers load
the plugin properly. It should point to a Java plugin in a network cab file with a value like:
pluginspage="http://java.sun.com/products/plugin/1.1/jinstall-11.cab#Version=1,1,0,0"
applet The applet tag is the original HTML 3.2 tag for embedding an applet in an HTML page. Applets loaded
using the applet tag are run by the browser, which may not be using the latest version of the Java
platform. To ensure that the applet runs with the latest version, use the object tag to load the Java
plugin into the browser. The plugin will then run the applet.
<applet
code="yourClass.class"
object="serializedObjectOrJavaBean"
codebase="classFileDirectory"
width="pixelWidth"
height="pixelHeight"
>
<param name="..." value="...">
...
alternate-text
</applet>
Please note that:
? Either code or object is specified, not both.
? The optional codebase attribute supplies a relative URL that specifies the location of the applet
class.
? param tags supply argument values for applet parameters.
app The app tag was a short-lived abbreviation for applet that is no longer supported. appletviewer trans-
lates the tag and prints out an equivalent tag that is supported.
<app
class="classFileName" (without a .class suffix)
src="classFileDirectory"
width="pixelWidth"
height="pixelHeight"
>
<param name="..." value="...">
...
</app>
OPTIONS
The following options are supported:
-debug Starts the applet viewer in the Java debugger, which debugs applets in the document. (See jdb(1).)
-encoding encoding_name
Specifies the input HTML file encoding name.
-J javaoption
Passes the string javaoption through as a single argument to java(1) which runs the compiler. The
argument should not contain spaces. Multiple argument words must all begin with the prefix -J, which
is stripped. This is useful for adjusting the execution environment or compiler memory usage.
RELATED
For more information, see
http://java.sun.com/j2se/1.4/docs/guide/plugin/developer_guide/
or search www.java.sun.com for "Java PlugIn HTML Specification"
CATEGORY