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java.lang.NoClassDefFoundError in junit

Tags:

java

unit-testing

junit

eclipse

noclassdeffounderror

People also ask

How do I fix Java Lang NoClassDefFoundError?

lang. NoClassDefFoundError, which means the Class Loader file responsible for dynamically loading classes can not find the . class file. So to remove this error, you should set your classpath to the location where your Class Loader is present.

How do I fix Java Lang NoClassDefFoundError in eclipse?

NoClassDefFoundError error in tomcat,JBoss,WebSphere* NoClassDefFoundError error in servers occurs because the jar is not in the classpath. To fix this, see the complete stack trace and find the jar which contains the jar and try to copy it to the server classpath or application classpath.

Is a Java Lang NoClassDefFoundError?

java. lang. NoClassDefFoundError is runtime error thrown when a required class is not found in the classpath and hence JVM is unable to load it into memory.

  1. Right click your project in Package Explorer > click Properties
  2. go to Java Build Path > Libraries tab
  3. click on 'Add Library' button
  4. select JUnit
  5. click Next.
  6. select in dropdown button JUnit4 or other new versions.
  7. click finish.
  8. Then Ok.

  1. Eclipse -> Top menu -> Run -> Run Configurations
  2. Delete all the occurrences of your test. Your test may appear as YourTest.Method_1(). Delete that as well.
  3. Re-run. Let Eclipse build a fresh configuration.

Addendum: Locally I have created a "User Library" and added to my projects which has

hamcrest-core-1.3.jar

junit-4.12.jar


The same problem can occur if you have downloaded JUnit jar from the JUnit website, but forgotten to download the Hamcrest jar - both are required (the instructions say to download both, but I skipped ahead! Oops)


When using in Maven, update artifact junit:junit from e.g. 4.8.2 to 4.11.

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