Question

我正在尝试运行Scala Junit 4测试，但我得到了NoClassDefFoundError: scala/Function1。我通过运行配置启动它。

任何人都知道这是什么问题？

完整错误：

java.lang.NoClassDefFoundError: scala/Function1
    at java.lang.Class.getDeclaredMethods0(Native Method)
    at java.lang.Class.privateGetDeclaredMethods(Unknown Source)
    at java.lang.Class.privateGetMethodRecursive(Unknown Source)
    at java.lang.Class.getMethod0(Unknown Source)
    at java.lang.Class.getMethod(Unknown Source)
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestLoader.isJUnit3SetUpTest(JUnit4TestLoader.java:61)
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestLoader.createTest(JUnit4TestLoader.java:49)
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestLoader.loadTests(JUnit4TestLoader.java:38)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:444)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:675)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)
Caused by: java.lang.ClassNotFoundException: scala.Function1
    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)
    ... 12 more

Answer 1

我遇到类似的问题，当我使用akka-http-2.11构建的scala 2.11.*时，我在类路径中使用scala-2.12.4。

错误是

java.lang.NoClassDefFoundError: scala/Function1$class

    at akka.stream.Supervision$$anon$1.<init>(Supervision.scala:57)
    at akka.stream.Supervision$.<init>(Supervision.scala:57)
    at akka.stream.ActorMaterializerSettings$.apply(ActorMaterializer.scala:258)
    at akka.stream.ActorMaterializerSettings$.apply(ActorMaterializer.scala:248)
    at akka.stream.ActorMaterializer$$anonfun$1.apply(ActorMaterializer.scala:41)
    at akka.stream.ActorMaterializer$$anonfun$1.apply(ActorMaterializer.scala:41)
    at scala.Option.getOrElse(Option.scala:121)
    at akka.stream.ActorMaterializer$.apply(ActorMaterializer.scala:41)
    at akka.stream.ActorMaterializer$.create(ActorMaterializer.scala:110)

（请参阅下面的build.gradle）

dependencies {
    compile group: 'org.scala-lang', name: 'scala-library', version: '2.12.4'
    compile group: 'com.typesafe.akka', name: 'akka-actor_2.12', version: '2.5.6'
    compile group: 'com.typesafe.akka', name: 'akka-http-experimental_2.11', version: '2.4.11.2'
}

FIX是在所有依赖项中使用相同版本的scala（2.11）。

dependencies {
    compile group: 'org.scala-lang', name: 'scala-library', version: '2.11.11'
    compile group: 'com.typesafe.akka', name: 'akka-actor_2.12', version: '2.5.6'
    compile group: 'com.typesafe.akka', name: 'akka-http-experimental_2.11', version: '2.4.11.2'
}

因此，请确保使用相同版本的scala。

Scala Junit - NoClassDefFoundError：scala / Function1

1 个答案: