Two Java VMs running

ballooba

I think I have two JVMs running on my laptop. I have two Java.exe files in my process list. Could this be why my laptop is running so slow?

Also what's the deal with this?

Exception in thread "main" java.lang.NoClassDefFoundError: javax/comm/CommPortId
entifier
        at sms.SMSAgent.open(SMSAgent.java:48)
        at sms.SMSAgent.<init>(SMSAgent.java:34)
        at sms.Main.<init>(Main.java:32)
        at sms.Main.main(Main.java:52)

aidan_walsh

Right now, yes, each seperate Java application will open a new JRE instance to run. The entire JRE. Thankfully, some bods at SUn have seen the folly in this, and are currently working on whats called "Barcelona"; basically a linking and sharing architecture to allow different apps run in the same VM.

As for the error, it looks like the javax.comm.CommPortIdentifier class is missing, or not included in the CLASSPATH.

ballooba

Cheers Aidan,

That error doesn't come up when I run it in NetBeans.

This is the first time I have ever tired to run a JAR I have made from the command line.

I just ran what was in the dist folder. Am I missing something?

ballooba

I'm running it like this btw:
java -jar JamboIn.jar

aidan_walsh

Find where the javax.comm package is ([location]), and run it as

java -jar -cp .:[location] JamboIn.jar

ballooba

The javax.com also has a DLL attached to it and a javax.properties file.

These are in the bin folder. Does this matter?

The above did not work anyway.

ballooba

Just to let you know i found a solution to this.

For executable jars the classpath is ignored. They are "closed" units.

Had to drop the -jar switch and use:

java -cp .;C:\j2ee\environment\j2sdk1.4.2_05\jre\lib\comm.jar;JamboIn.jar sms.Main

aidan_walsh

Hmm. I didn't know that. Thanks for the tip. Sorry I wasn't more help.

ballooba

Thanks for trying to help anyway. Much appreciated.