IDEA里运行代码时出现Error:scalac: error while loading JUnit4, Scala signature JUnit4 has wrong version expected: 5.0 found: 4.1 in JUnit4.class错误的解决办法（图文详解） - 大数据和AI躺过的坑 - 博客园

安宇雨 - 随手采集
2020-05-13 05:43:42
随手采集
0000-未整理-等待研究

　　不多说，直接上干货！

问题详情

　　当出现这类错误时是由于版本不匹配造成的

; "复制代码")

Information:2017/8/29 7:54 - Compilation completed with 10 errors and 0 warnings in 3s 910ms
Error:scalac: error while loading JUnit4, Scala signature JUnit4 has wrong version
expected: 5.0 found: 4.1 in JUnit4.class Error:scalac: error while loading ConsoleRunner, Scala signature ConsoleRunner has wrong version
expected: 5.0 found: 4.1 in ConsoleRunner.class Error:scalac: error while loading Specification, Scala signature Specification has wrong version
expected: 5.0 found: 4.1 in Specification.class D:\Code\IntelliJIDEACode\HadoopSparkMllibAction\src\test\scala\zhouls\bigdata\MySpec.scala
Error:(6, 26) illegal inheritance;
self-type zhouls.bigdata.MySpecTest does not conform to org.specs.runner.JUnit4's selftype org.specs.runner.JUnit4
class MySpecTest extends JUnit4(MySpec) ^ Error:(6, 18) org.specs.runner.JUnit4 does not have a constructor class MySpecTest extends JUnit4(MySpec) ^ Error:(8, 29) illegal inheritance;
self-type zhouls.bigdata.MySpecRunner.type does not conform to org.specs.runner.ConsoleRunner's selftype org.specs.runner.ConsoleRunner
object MySpecRunner extends ConsoleRunner(MySpec) ^ Error:(8, 21) org.specs.runner.ConsoleRunner does not have a constructor object MySpecRunner extends ConsoleRunner(MySpec) ^ Error:(10, 23) illegal inheritance;
self-type zhouls.bigdata.MySpec.type does not conform to org.specs.Specification's selftype org.specs.Specification
object MySpec extends Specification { ^ Error:(10, 15) org.specs.Specification does not have a constructor object MySpec extends Specification { ^ Error:(11, 27) value should is not a member of String "This wonderful system" should { ^

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解决办法

　　如果你想快速运行的话，就用idea建立的maven项目生成的几个test类和对象注释掉，或者删除掉即可运行。