java myeclipse The type java.lang.CharSequence cannot be resolved. It is indirectly referen

myeclipse  The type java.lang.CharSequence cannot be resolved. It is indirectly referen 因为jdk和jre版本不一样导致的 解决方法，右击项目，选择propreties->java build path->Libraries->Add Library->JRE System Library, Execution

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