Access restriction: The type Resource is not accessible due to restriction on required library

• 方法一:

全局属性Project>preferences>java>Compiler>Errors/Warnings>把右侧的【Deprecated and restricted API>Forbidden reference的Error】置为【Warning】.

• 方法二(终极方法:)

 项目属性preferences>java build path>把右侧【libraries中的JRE System Library】删除重新导入.