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 environment和alternate JRE的版本一样就可以了，如图所示：