How do I get a JAR file in the current directory in the class path for a Java execution?

Question

I have a class file Main.class which needs a JAR file abc.jar to run.

Both files are in the same directory. Now I try to run the class file with

java -cp "." Main

but I get a java.lang/NoClassDefFoundError.

I thought -cp "." tells the classpath to include the current directory, but somehow it doesn't.

How do I get this JAR file in the current directory on the class path?

This thread may help you to figure out the solution: https://stackoverflow.com/questions/9395207/how-to-include-jar-files-with-java-file-and-compile-in-command-prompt — patrinox, Sep 13 '22 at 09:08
@patrinox Thanks. This got me to the solution: I forgot that the JAR _itself_ needs to be in the `CLASSPATH` property, not only the _directory_ containing the JAR. — halloleo, Sep 14 '22 at 00:49

score 0 · Accepted Answer · answered Sep 14 '22 at 00:53

0

Thanks to patrinox' comment I figured it out:

The JAR itself needs to be in the CLASSPATH property, not only the directory containing the JAR. Therefore the command line has to read:

java -cp ".:./abc.jar" Main

answered Sep 14 '22 at 00:53

halloleo

1 Answers1