1、是因为之前安装是移动了安装路径。可以使用360重新缺卸安装的jdk，然后清楚注册文件。重新安装就可以了
【上篇】MyEclipse10在function定义document.onkeydown出错
【下篇】解决java compiler level does not match the version of the installed java project facet .
【下篇】解决java compiler level does not match the version of the installed java project facet .