FAQ

by Holger Crysandt

• Q: Java Web Start can't download the files.
• A: Set the proxy setting of your Java Web Start application. Take a look at the proxy-settings of your browser or/and ask your local system administrator for assistance.

• Q: Java crashes with a java.lang.OutOfMemoryError.
• A: By default the Java VM uses 16M-64M (depending on your Version and OS) of memory maximum. You can increase the limit with the switch -Xmx.
  Example:
  java -Xmx256M -jar MPEG7AudioEnc.jar ... If you use ant with the mp7encode option you can increase the maximum consumption of memory using the mpeg7audioenc.maxmemory property:
  ant ... -Dmpeg7audioenc.maxmemory=256M ... mp7encode

• Q: I can't encode mp3-file, can I?
• A: Yes you can. Java does not support playing mp3 files by default. But you can download some kind of plugin. Download the following files and include them in your classpath.
  • jl1.0jar
  • mp3spi1.9.4.jar
  • tritonus_share.jar
  You can get the latest version at http://www.javazoom.net/javalayer/javalayer.html. If you use ant with the target mp7encode just copy the three files in the folder libs/. All files in the libs folder are automatically included into the classpath.

Last updated: 2009-06-13