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views:

31

answers:

1
Q: 

java applet: Zebra printer found but command string does not print

Hello,

I have a small java application that prints a label on a Zebra printer. When the port is made to an applet, (app => applet) nothing comes out from the printer.

Any ideas why this is happening?

  • The printer 'lookup' process is completed successfully from the java applet and the printer is found
  • The command string to be sent is constructed properly...

but when the command is sent, nothing comes out.

Note: While the application was developed, when there was an error in the command string, nothing happened, or the printer seemed to be responding but not printing anything.

Is this a security issue? If it is, can anyone point to the right direction for solving this problem? (resources, books, tips - all welcome)

Regards,

A: 

Enable the java console and see what exception is thrown by your code.

Thorbjørn Ravn Andersen  2010-06-28 20:55:10
thanks for the reply. No exceptions are thrown. Command string is OK. Don't know if it's the non-latin chars. They should not be a problem but I am just wondering...
andreas  2010-06-28 20:56:48
Have you enabled trace mode in the Java Console? Does this run in the appletviewer?
Thorbjørn Ravn Andersen  2010-06-28 21:46:33
Trace mode is enabled. Haven't tried the appletviewer (will look into it).
andreas  2010-06-28 22:24:52
Found the problem. Although the applet requested access to the printer it had to be singed in order to work. Maybe this is standard procedure but i thought i didn't have to sign it. Thanks for the answer + comments
andreas  2010-06-29 18:38:03
How did you find out? (and, yes, you do need to sign to get out of the sandbox)
Thorbjørn Ravn Andersen  2010-06-29 19:08:38

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