“线程"main"中的异常". java.lang.NoClassDefFoundError:org/hamcrest/SelfDescribing“； [英] "Exception in thread "main" java.lang.NoClassDefFoundError: org/hamcrest/SelfDescribing"

问题描述

在我的Ubuntu上，我运行一个Java可执行文件，但出现了我未在代码中明确使用的某些软件包的错误.可能的解决方案是什么?谢谢.

On my Ubuntu, I run an java executable, with error about some package I didn't explicitly use in my code. What might be the solution? Thanks.

$ java -cp .:/home/tim/program_files/programming/java/junit-4.11.jar MyTest
Exception in thread "main" java.lang.NoClassDefFoundError: org/hamcrest/SelfDescribing
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:800)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:449)
at java.net.URLClassLoader.access$100(URLClassLoader.java:71)
at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
at org.junit.runner.Computer.getSuite(Computer.java:28)
at org.junit.runner.Request.classes(Request.java:75)
at org.junit.runner.JUnitCore.run(JUnitCore.java:128)
at org.junit.runner.JUnitCore.runClasses(JUnitCore.java:73)
at MyTest.main(MyTest.java:13)
Caused by: java.lang.ClassNotFoundException: org.hamcrest.SelfDescribing
at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
... 17 more

推荐答案

来自 Junit Wiki

From Junit Wiki

纯朴的JAR
下载以下JAR，并将其放在测试类路径中:

Plain-old JAR
Download the following JARs and put them on your test classpath:

junit.jar hamcrest-core.jar

将 hamcrest 核心jar添加到类路径中解决问题.

Add the hamcrest core jar to the class path to resolve the issue.

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