Home/ Questions/Q 7821151
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-06-02T07:32:55+00:00

I’m trying to use Emma coverage tool with Eclipse, but i’m a little confused.

  • 0

I’m trying to use Emma coverage tool with Eclipse, but i’m a little confused.

So I added emma.jar and emma_ant.jar into /usr/lib/jvm/java-6-openjdk-common/jre/lib/ext/emma/ directory and created a Java Project under Eclipse using JRE: java-6-openjdk

I copied a build.xml example file into my project and edited the emma.dir property to /usr/lib/jvm/java-6-openjdk-common/jre/lib/ext/emma/

Then, when I create a .jar file, and try to run it with Emma:

java emmarun -jar HelloWorld.jar

I get this:

Exception in thread “main” java.lang.NoClassDefFoundError: emmarun
Caused by: java.lang.ClassNotFoundException: emmarun at
java.net.URLClassLoader$1.run(URLClassLoader.java:217)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
at java.lang.ClassLoader.loadClass(ClassLoader.java:321)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:294)
at java.lang.ClassLoader.loadClass(ClassLoader.java:266)
Could not find the main class: emmarun. Program will exit.

Thanks for your help!

Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. Editorial Team

    You are doing it the hard way. Install the EclEmma plugin and you just have to select the correct launch configuration to get test coverage.

    Update: I just realized that EclEmma uses JaCoCo internally, and no longer Emma. Still, it’s a great tool, I’d go with it nevertheless.

    But to solve your problem: I don’t think you can have subfolders in lib/ext. Move the jar directly inside lib/ext and it should work.

    • 0