java.lang.CharSequence cannot be resolved

报错信息

The project was not built since its build path is incomplete. 
Cannot find the class file for java.lang.CharSequence.
Fix the build path then try building this project

解决方案

此异常是由于jre的版本不匹配导致的。笔者在使用java8时出现此问题解决方案为:配置项目的编译路径将jre换为更低版本,比如java6。

方法步骤:

1.在MyEclipse中的配置方式为:右击项目->configuration buildPath->选择jre8->remove->add library->JRE SystemLibrary->jre6。
2.clean此project,发现问题解决!
原文地址:https://www.cnblogs.com/polestar/p/7655820.html