What to do when Eclipse won’t start
After I installed Eclipse on a new iMac, I used it for several days and everything seemed OK. Then, suddenly, it stopped launching. No bouncing icon in the dock, no splash screen, just no response
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Category: Java
The Processing Instruction Target Matching “[xX][mM][lL]” is Not Allowed
When running Java or other types of applications which use an XML file as part of the input, you may see this error: The Processing Instruction Target Matching “[xX][mM][lL]” is Not Allowed.
Often the cause is a malformed XML file, with a common problem being a blank line accidentally inserted before the required first line of the xml:
[ A blank line here will cause the error ] <?xml version-"1.0"?>Continue reading
Fixing the error: JAVA_HOME is not set on a Mac
While setting up Nutch on a Mac, I kept getting this error in the terminal:
Error: JAVA_HOME is not set
To fix the error on OS X 10.6.x (Snow Leopard), enter the following at the command prompt:
export JAVA_HOME=$(/usr/libexec/java_home)
On 10.5 and above, the command line tool /usr/libexec/java_home dynamically finds the top Java version specified in Java Preferences for the current user. Using this method will allow the path to automatically change as software updates change Java versions.
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When Firefox won’t launch Java applets
If Firefox won’t launch java applets, but Internet Explorer will, you may need to change some settings in the Java control panel to turn on Applet support for Firefox. (Expert users: One sign that this is the issue rather than some Java security exception is that the Java console will be completely blank when you try to launch the applet in Firefox. _
Unfortunately on many PC’s, the Java control panel can be a challenge to find. First, check in the control panels area for “Java.” If it is not there, you may have to look in
C:Program FilesJava
for JRE (Java Runtime Environment) folders.
In the image below there are several of them. Usually you should pick the most recent one, as that is the one that is probably in use.
Firefox and Java/SCORM issues
Our LMS uses Java applets to transmit SCORM data back and forth between learning activity and the LMS. Sometimes this causes problems, because Java security on various browsers is increasingly strict. However we can usually
Continue readingJava 1.6 and LiveConnect
If you are having problems with applications which use liveconnect, you may find it helpful to know that there are some issues with certain updates of Java 1.6 and Liveconnect. I’ve found that sometimes installing
Continue readingJava error message: Several Java Virtual Machines running in the same process
When attempting to launch browser-based SCORM courseware, people have been getting the error: “Several Java Virtual Machines running in the same process caused an error”
Apparently many people have this issue since upgrading java. I came across it because it can affect the delivery of elearning courses if the learning management system relies on a java-applet based scorm adaptor to communicate.
Continue readingStreaming Flash Video with open-source software
Flash video has several advantages over other formats, especially the fact that the Flash plugin comes pre-installed on most browsers. For this reason I’ve been looking at using streaming Flash video in sites which must support a wide variety of browsers and platforms.
Continue readingJava console on Mac
It’s not obvious when using Safari on the Mac how to get the Java console to start up. Go to Applications/Utilities/Java/Java 1.x/x Plugin Settings and turn it on there. Then it will show up whenever
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