下载opencsv后Java程序无法运行

Question

I downloaded the opencsv (from http://sourceforge.net/projects/javacsv/files/latest/download ) and since then I have been getting this error with all my Java programs

java.lang.NoClassDefFoundError: HelloWorld
Caused by: java.lang.ClassNotFoundException: HelloWorld
    at java.net.URLClassLoader$1.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at java.lang.ClassLoader.loadClassInternal(Unknown Source)
Exception in thread "main"

How can I fix this? I realized I didn't need the opencsv anyway...how can I remove it so that my programs can compile and run as usual? I'm using Eclipse Version: 1.4.2.20120213-0813

Answer 1

您可以通过以下方法来删除插件：转到“帮助”->“关于”（或在Mac上为Eclipse->“关于”），选择安装详细信息，选择要删除的插件，然后选择“卸载”。