JUnit4 + Eclipse“启动期间发生内部错误” [英] JUnit4 + Eclipse "An internal error occurred during Launching"

问题描述

我试图在Eclipse 3.4.2上运行JUnit4测试用例，但是我甚至没有开始。我在我的构建路径和测试应用程序中有junit-4.7.jar。

这是一个简单的例子，说明了我的问题

  ; 
 import org.junit.Before; 
 import org.junit.Test; 
 
 public class UTest {
 @Test 
 public void test（）{
} 
 
 @Before 
 public void setUp （）throws异常{
} 
} 
  

这个编译好的

然后我从Eclipse中执行运行JUnit测试用例，我收到一条带有此消息的错误对话框

 启动UTest遇到问题
在启动UTest期间发生内部错误
 java.lang.NullPointerException 
  / pre> 
 
 
什么原因导致这些NullPointerExceptions？我做错了什么？
解决方案
我可以通过删除工作区和Eclipse目录并重新启动来解决这个问题。
 
I'm trying to run JUnit4 test cases on Eclipse 3.4.2 but it's not even starting for me. I have the junit-4.7.jar in my build path and the test application. 

Here is a simple example that illustrates my problem
package test;
import org.junit.Before;
import org.junit.Test;

public class UTest {    
    @Test
    public void test() {
    }

    @Before
    public void setUp() throws Exception {
    }
}
This compiles fine

Then I do "Run JUnit Test case" from Eclipse and I get an error dialog with this message
"Launching UTest' has encountered a problem
An internal error occurred during: "Launching UTest".
java.lang.NullPointerException
What causes these NullPointerExceptions?  What am I doing wrong?
解决方案
I was able to fix this just by deleting the workspace and the Eclipse directory and starting over. 

                        
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