Java compiler level does not match the version of the installed Java project fac

问题一：

问：项目图标报错，Problems 试图有一条错误显示“Java compiler level does not match the version of the installed Java project facet.” 。

答：这个是因为Facted Project 中的Java 版本设定与项目的Java 版本设定不一致。

如Drawing １: Modify: Modify Faceted Project 中所示，这个时候项目的Java 的版本为5.0 。如果项目的Java Compiler 的设置如Drawing ２: Java C: Java Compiler 中所示的设置。就是会出现问题中所述的错误。修改的方式很简单，只要统一一下他们的设置。让他们保持一致就OK 了。

project 编译问题

1、properties->project Facets->修改右侧的version 保持一致

2、window->preferences->java->Compiler->设置右侧的Compiler compliance level

3、window->preferences->java->Installed JREs->设置或者选择右侧的Installed JREs

以上三处的jdk版本要保持一致，才能编译通过

http://www.cnblogs.com/lemonme/articles/1655894.html

http://zhoshijie.iteye.com/blog/981849

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