错误信息：

Description Resource Path Location Type
Build path specifies execution environment J2SE-1.5. There are no JREs installed in the workspace that are strictly compatible with this environment. cc Build path JRE System Library Problem

解决方案：

右键项目>Properties>Java Build Path>选择libraries选项卡>Remove J2SE-1.5>Add Library>选择JRE System Library>载入Workspace default JRE