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Editorial Team
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Asked: 2026-05-27T18:14:10+00:00

Requirements: Command-line only, i.e. no IDE’s Do not want to use classpath argument OS:

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Requirements:

  • Command-line only, i.e. no IDE’s
  • Do not want to use classpath argument
  • OS: OS X v10.6.8

Steps:

  • Setup CLASSPATH environment variable: export CLASSPATH="/path-jar-files-are-at/*"
  • Compile my java app: javac MyApp.java
  • Launch my java app: java MyApp

After launching, the following error appears:

Exception in thread "main" java.lang.NoClassDefFoundError: MyApp
Caused by: java.lang.ClassNotFoundException: MyApp

Using classpath argument doesn’t have this problem

  • Compile my java app: javac -classpath /path-jar-files-are-at/* MyApp.java
  • Launch my java app: java -classpath /path-jar-files-are-at/* MyApp

Any ideas?

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1 Answer

  1. Editorial Team

    The CLASSPATH should not contain the trailing “/*” – that is not going to give you a valid classpath. The shell is expanding the /* and separating the list with whitespace/newlines – rather than the “:” character.

    If you still really want it to work this (dynamic) way, try something like this:

    export CP=`ls /path-jar-files-are-at/*`; CP=`echo $CP | sed 's/\.jar\s/.jar:/g'`; CP="$CP:/path-jar-files-are-at"
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