Access restriction: The constructor SunJCE() is not accessible due to restriction on required library

今天在做JAVA网络编程实验，在搭建项目环境时出现了以下编译错误：
Access restriction: The constructor SunJCE() is not accessible due to restriction on required library

E:/JDK/JDK1.6.0_03/jdk1.6.0_03/jre/lib/ext/sunjce_provider.jar
翻译过来大概是：由于必须的库限限制访问，SunJCE() 构造函数不可访问。
 
在网上搜了一下，解决办法是修改编译选项，方法如下：Window -> Preferences -> Java -> Compiler ->

 Errors/Warnings -> Deprecated and restricted API -> Forbidden reference (access rules) -> Warnings，

或者在项目上修改编译选项。