今天写在eclipse中用JDK8写switch语句时用了JDK13的语法,点击错误提示 change project compliance and JRE to 13 and Enable preview features on project properties. 之后原来的jar包没了,项目上来了个红色的大感叹号,内容报错. 原因是把JDK版本改了说下解决方法吧右击项目,找到Propert ...
今天写在eclipse中用JDK8写switch语句时用了JDK13的语法,点击错误提示 change project compliance and JRE to 13 and Enable preview features on project properties. 之后原来的jar包没了,项目上来了个红色的大感叹号,内容报错. 原因是把JDK版本改了说下解决方法吧右击项目,找到Propert ...
今天写在eclipse中用JDK8写switch语句时用了JDK13的语法,点击错误提示 change project compliance and JRE to 13 and Enable preview features on project properties. 之后原来的jar包没了,项目上来了个红色的大感叹号,内容报错. 原因是把JDK版本改了说下解决方法吧右击项目,找到Propert ...