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Editorial Team
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Asked: 2026-06-12T23:54:52+00:00

I got a sample project, copied from somewhere else, when I am trying to

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I got a sample project, copied from somewhere else, when I am trying to run it in netbeans I am getting some error/exceptions in tomcat’s console window.

java.lang.ClassNotFoundException: javax.persistence.Entity
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1711)
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1556)
    at org.springframework.core.type.classreading.RecursiveAnnotationAttributesVisitor.visitEnd(AnnotationAttributesReadingVisitor.java:167)
    at org.springframework.asm.ClassReader.a(Unknown Source)
    at org.springframework.asm.ClassReader.accept(Unknown Source)
    at org.springframework.asm.ClassReader.accept(Unknown Source)

javax.persistence is already added to my project. I even removed and re-added in netbeans but still same error. This error is when running the web applictation not when compiling.
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1 Answer

  1. Editorial Team

    You need to add following Jar Files to your Build Path: –

    • javax.persistence_2.0.3.v201010191057.jar
    • org.eclipse.persistence.jpa_2.3.0.v20110604-r9504.jar
    • org.eclipse.persistence.jpa.equinox_2.3.1.v20111018-r10243.jar
    • org.eclipse.persistence.antlr_2.3.0.v20110604-r9504.jar
    • org.eclipse.persistence.asm_2.3.0.v20110604-r9504.jar

    Preferably adding the first one will work, as javax.persistence.Entity is found in that Jar only.
    But you may also need to add the later ones, for working with JPA

    Google them with the name of JPA Jars. You will get them.

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