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  1. ,

    delete antlr from maven repository and reinstall it.

  2. ,
    via oracle.com by Unknown author

    App tries to load in a class through its string name using forName method in class Class, findSystemClass method in class ClassLoader, loadClass method in class ClassLoader but no definition for the class with the specified name could be found.

Solutions on the web

via Stack Overflow by praneel
, 1 year ago
Failed to execute goal org.codehaus.mojo:exec-maven-plugin:1.2.1:java (default-cli) on project UAF: An exception occured while executing the Java class. com.shn.library.RunSuitesInParallel
via Google Groups by superseed77, 1 year ago
Failed to execute goal org.codehaus.mojo:exec-maven-plugin:1.2.1:java (default-cli) on project test-spring-kie: An exception occured while executing the Java class. null
via Stack Overflow by user1766169
, 2 years ago
Failed to execute goal org.codehaus.mojo:exec-maven-plugin:1.2.1:java (default-cli) on project chapter02: An exception occured while executing the Java class. null
via Stack Overflow by Felix_T
, 5 months ago
Failed to execute goal org.codehaus.mojo:exec-maven-plugin:1.2.1:java (default-cli) on project helloworld: An exception occured while executing the Java class. Launcher
via GitHub by matthewfarwell
, 1 year ago
Failed to execute goal org.codehaus.mojo:exec-maven-plugin:1.2.1:java (default-cli) on project scalastyle_2.9.1: An exception occured while executing the Java class. org.scalastyle.Main
via Google Groups by Dev Steelorbis, 1 year ago
Failed to execute goal org.codehaus.mojo:exec-maven-plugin:1.2.1:java (default-cli) on project dfp-axis- examples: An exception occured while executing the Java class. null
java.lang.ClassNotFoundException: com.shn.library.RunSuitesInParallel	at java.net.URLClassLoader$1.run(URLClassLoader.java:366)	at java.net.URLClassLoader$1.run(URLClassLoader.java:355)	at java.security.AccessController.doPrivileged(Native Method)	at java.net.URLClassLoader.findClass(URLClassLoader.java:354)	at java.lang.ClassLoader.loadClass(ClassLoader.java:423)	at java.lang.ClassLoader.loadClass(ClassLoader.java:356)	at org.codehaus.mojo.exec.ExecJavaMojo$1.run(ExecJavaMojo.java:285)	at java.lang.Thread.run(Thread.java:722)