eslipse
在eclipse调试过程中，出现an internal error during"lauching 文件名",之前的调试时没问题，再建立新的class就会出现这种情况，在输入过程会有：the "jaxb proposal computer"proposal computer from the "org.eclipse.jpt.javb.ui'plug-in did not complete normally.unable to instantiate the extension. to avoid this message,disable the 'jaxb'proposal category on the content assist preference page.
