Fel测试异常Check that your class path includes tools

        Fel测试时在build path里添加fel.jar和antlr.min.jar后运行，抛出异常 Exception in thread "main" java.lang.IllegalStateException: Cannot find the system Java compiler. Check that your class path includes tools.jar。这时添加jdk内置tools.jar时不能像以上两个jar包同样配置，而是：

    右击全部project下的JRE System Libray-->Properties，在出来的界面上,点击Installed JREs-->选中目录如C:\Program Files\Java\jre1.8.0_60，在弹出的界面中点击add External JARs,将jdk-lib-tools.jar加进去便可。