330 Java Tips.pdf - FTP Server

Applets
Anyone have any ideas what is going wrong?
Answer: The parseDouble method was only added to Java in JDK 1.2
Browsers typically only support Java 1.1
If you have the JRE installed, you can run Java 1.2 applets. But you must also change the HTML
code that embeds the applet. Check javasoft.com. I believe they have a program which will
automatically change the tag to and add whatever else is needed. It's been a
while since I've done applets but I do remember running across a similar problem.
Q: In my applet I have a bunch of gif's in my JAR file. When I try to access a gif using:
Image img = getImage(getCodeBase(), "image.gif");
everything works fine under Microsoft Internet Explorer but it does not under Netscape and
appletviewer. Of course I do not have any gifs in my CodeBase directory on server.
Any idea why?????
Answer: Because this is not how you access resources in a Jar file. You need to use
getResourceAsStream if you want to access GIFs from Netscape. Look at:
http://developer.iplanet.com/docs/technote/java/getresource/getresource.html
for example code. This same code will work in Sun's Appletviewer.
--
David Risner
http://david.risner.org/
Q: How do I get JVM version in Internet Explorer?
Q: When you open the Java Console through internet explorer, it prints the following useful line at the
top:
Microsoft (R) VM for Java, 5.0 Release 5.0.0.3318
We would like to be able to obtain the above String (or atleast the 5.0.0.3318 part of it) through a Java
Applet / Javascript at runtime.
Does anyone know of any handy methods that allow access to this String ? I've looked in all the
System.properties, but it wasn't there. Is it stored in the user's registry anywhere ?
Answer: just for Microsoft't VM!
try :
class test{
public static void main(String[] args){
String build;
build=com.ms.util.SystemVersionManager.getVMVersion().getProperty ("BuildIncrement");
System.out.println("Using build "+build);
}
}
Real Gagnon from Quebec, Canada
* Looking for code code snippets ? Visit Real's How-to
* http://www.rgagnon.com/howto.html
Q: I wonder if there is a way to find out if a button in an applet has been clicked, no matter which
of the buttons in an applet it might be.
Of course I can write, with a particular button (if event.target==button1) but maybe there is a syntax
file:///F|/350_t/350_tips/applets.htm (5 of 10) [2002-02-27 21:17:49]