Compiling Junit on windows 8 command line error

Question

I created a Junit test case using Eclipse and it works fine. I am trying to compile it using command line but can't seem to do it.

I was able to "compile" it fine..but now when I try to run it I get the following error:

 JUnit version 4.8.2
Exception in thread "main" java.lang.NoClassDefFoundError: org/hamcrest/SelfDesc
ribing
        at java.lang.ClassLoader.defineClass1(Native Method)
        at java.lang.ClassLoader.defineClass(Unknown Source)
        at java.security.SecureClassLoader.defineClass(Unknown Source)
        at java.net.URLClassLoader.defineClass(Unknown Source)
        at java.net.URLClassLoader.access$100(Unknown Source)
        at java.net.URLClassLoader$1.run(Unknown Source)
        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)
        at org.junit.runner.Computer.getSuite(Computer.java:26)
        at org.junit.runner.Request.classes(Request.java:69)
        at org.junit.runner.JUnitCore.run(JUnitCore.java:117)
        at org.junit.runner.JUnitCore.runMain(JUnitCore.java:98)
        at org.junit.runner.JUnitCore.runMainAndExit(JUnitCore.java:53)
        at org.junit.runner.JUnitCore.main(JUnitCore.java:45)
Caused by: java.lang.ClassNotFoundException: org.hamcrest.SelfDescribing
        at java.net.URLClassLoader$1.run(Unknown Source)
        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)
        ... 18 more

To run it I am using:

java -cp "E:/Android ADT/adt-bundle-windows-x86_64-20130219/eclipse/plugins/org.junit_4.8.2.v4_8_2_v20110321-1705/junit.jar;." org.junit.runner.JUnitCore SchedulerTest

The compilation worked fine, and for compiling I used:

javac -cp "E:/Android ADT/adt-bundle-windows
-x86_64-20130219/eclipse/plugins/org.junit_4.8.2.v4_8_2_v20110321-1705/junit.jar
;." SchedulerTest.java

Do you use the hamcrest bundled inside the `junit.jar` or do you have a separate dependency? — janos, May 30 '13 at 21:57
Don't believe so. The only thing I am importing is : `import static org.junit.Assert.*; import org.junit.Test;` — user1411893, May 30 '13 at 22:33

janos · Answer 1 · 2013-05-31T06:11:10.897

When compilation works fine but you get java.lang.NoClassDefFoundError when running the code, that usually indicates a missing runtime dependency. As in this case, org.hamcrest.SelfDescribing is not used at compile time, but required at runtime.

hamcrest is usually bundled within the official junit.jar that you can download from junit.org, however your E:/Android ADT/adt-bundle-windows-x86_64-20130219/eclipse/plugins/org.junit_4.8.2.v4_8_2_v20110321-1705/junit.jar doesn't have it. Look for a hamcrest jar in the Android ADT plugins directory E:/Android ADT/adt-bundle-windows-x86_64-20130219/eclipse/plugins/ and include that in your classpath when you run your application.

That is, run like this:

java -cp "E:/Android ADT/adt-bundle-windows-x86_64-20130219/eclipse/plugins/PATH_TO_HAMCREST.jar;E:/Android ADT/adt-bundle-windows-x86_64-20130219/eclipse/plugins/org.junit_4.8.2.v4_8_2_v20110321-1705/junit.jar;." org.junit.runner.JUnitCore SchedulerTest

Finally, the unit test works fine in Eclipse because there hamcrest is part of the default classpath when you run unit tests.

Compiling Junit on windows 8 command line error

1 Answers1