java加密用到了BASE64Decoder時報錯信息:Access restriction: The type BASE64Encoder is not accessible due to rest

在Eclipse中編寫Java代碼時,用到了BASE64Decoder,import sun.misc.BASE64Decoder;但是Eclipse提示: 
Access restriction : The type BASE64Decoder is not accessible due to restriction on required library C:\Program 
files\java\jre6\lib\rt.jar html

最後在http://forums.dzone.com/eclipse/384-access-restriction- problems.html找到答案,只須要在project build path中先移除JRE System Library,再添加庫JRE System Library,從新編譯後就一切正常了java

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