java.exe -jar的其他jar文件

Question

I run the following command:

C:\Projects\java -cp ./dependency.jar -jar ./dist/main.jar
Exception in thread "main" java.lang.NoClassDefFoundError: MyException
Caused by: java.lang.ClassNotFoundException: MyException
    at java.net.URLClassLoader$1.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
Could not find the main class: Main. Program will exit.

MyException is inside dependency.jar. I also tried to replace -cp with -classpath. What do I do wrong?

Answer 1

The -cp options is ignored if you use -jar . If you need extra jar-files on the class-path, you should specify this in the Manifest of main.jar like this:

Class-Path: dependency.jar

(Then you can run your program using java -jar main.jar .)

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• problem related to MANIFEST.MF in jar

Answer 2

Have you tried specifying the class path in the windows environment variable CLASSPATH ?

specify your environment variable CLASSPATH and put the value of your JAVA_HOME\\lib and (path to all your classes) and also include current directory by including (dot or period sign).