My program need a jar file, let see test.jar. I use java -cp to indicate the CLASSPATH. Why must I point to the test.jar? Why can't I point a directory which contains the jar file?
For example, when i use:
java -cp /test/test.jar:. MyProgram// it works fine
But when I use:
java -cp /test:. MyProgram// an error indicating can't find a class will be shown
> According to the help message:
> -cp <class search path of directories and zip/jar
> files>
> It says -cp can point to a directory.
>
> Message was edited by:
> youhaodiyi
Yes, you are right. It can point to a directory. But the directory have to contain the file structure of your application. This means the given directory is used as a virtual jar-file and not as directory itself.
For example you have two packages
com.test1
and
com.test2
So the target file structure must be
C:\myjar\com\test1
C:\myjar\com\test2
So you could launch like
java -cp C:\myjar\ com.TestClass
I hope it helps you to understand the meaning of using the classpath.