P2 Name: pa48320 Date: 01/11/2001
The Extension mechanism in the JRE allows a jar to contain an installation class that will install the jar as an extension. On Windows 2000 this process hangs. Create the following applet and add it to a jar called hello.jar. Use the manifest:
Extension-List: HelloExt
HelloExt-Extension-Name: HelloExt
HelloExt-Specification-Version: 1.0
HelloExt-Implementation-URL: http://<machine name>/w2k/HelloExt.jar
applet code:
import java.applet.*;
import java.awt.*;
import javax.swing.*;
public class HelloWorldApplet extends JApplet
{
public void init() {
Container c = getContentPane();
c.setLayout( new FlowLayout(FlowLayout.CENTER) );
c.add( new JLabel("HelloWorldApplet") );
}
}
Create the following class for installing an extension and put it in HelloExt.jar with the following manifest:
Extension-Name: HelloExt
Specification-Vendor: SAS Institute Inc.
Implementation-Vendor-Id: com.sas
Implementation-Vendor: SAS Institute Inc.
Specification-Version: 1.0
Implementation-Version: 1.0
Main-Class: HelloExtInstall
public class HelloExtInstall
{
public static void main(String args[]) {
}
}
Sign HelloExt.jar. Now create hello.html as follows:
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML//EN">
<HTML>
<HEAD>
<TITLE>HelloWorldApplet</TITLE>
</HEAD>
<BODY>
<HR>
<SCRIPT LANGUAGE="JavaScript"><!--
var _info = navigator.userAgent;
var _ns = false;
var _ie = (_info.indexOf("MSIE") > 0
&& _info.indexOf("Win") > 0
&& _info.indexOf("Windows 3.1") < 0);
//--></SCRIPT>
<COMMENT>
<SCRIPT LANGUAGE="JavaScript1.1"><!--
var _ns = (navigator.appName.indexOf("Netscape") >= 0
&& ((_info.indexOf("Win") > 0
&& _info.indexOf("Win16") < 0
&& java.lang.System.getProperty("os.version").indexOf("3.5") < 0)
|| (_info.indexOf("Sun") > 0) || (_info.indexOf("Linux") > 0) ));
//--></SCRIPT>
</COMMENT>
<SCRIPT LANGUAGE="JavaScript"><!--
if (_ie == true) {
document.writeln(" <OBJECT");
document.writeln(" CLASSID=\"clsid:8AD9C840-044E-11D1-B3E9-00805F499D93\"");
document.writeln(" CODEBASE=\"http://java.sun.com/products/plugin/1.3.0_01/jinstall-130_01-win32.cab#Version=1,3,0,1\"");
document.writeln(" HEIGHT=400");
document.writeln(" WIDTH=600");
document.writeln(" >");
document.writeln(" <NOEMBED><XMP>");
}
else if (_ns == true) {
document.writeln(" <EMBED");
document.writeln(" PLUGINSPAGE=\"http://java.sun.com/products/plugin/1.3.0_01/plugin-install.html\"");
document.writeln(" TYPE=\"application/x-java-applet;jpi-version=1.3.0_01\"");
document.writeln(" HEIGHT=400");
document.writeln(" WIDTH=600");
document.writeln(" ARCHIVE=\"Hello.jar\"");
document.writeln(" CODE=\"HelloWorldApplet.class\"");
document.writeln(" ><NOEMBED><XMP>");
}
//--></SCRIPT>
<APPLET CODE="HelloWorldApplet.class" WIDTH=600 HEIGHT=400 ARCHIVE="Hello.jar" ></XMP>
<PARAM NAME="ARCHIVE" VALUE="Hello.jar">
<PARAM NAME="CODE" VALUE="HelloWorldApplet.class">
</APPLET>
</NOEMBED></EMBED></OBJECT>
<HR>
</BODY>
</HTML>
Run using Hello.html.
Approve downloading of HelloExt.jar. Approve HelloExt's signed identity. A console window is created to run HelloExt main class HelloExtInstaller, but it hangs and never finishes.
======================================================================
- duplicates
-
JDK-4413946 extension installation fails in JPI on Windows 2000
-
- Resolved
-