本文介绍了解决Eclipse中项目图标出现“JavacompilerleveldoesnotmatchtheversionoftheinstalledJavaprojectfacet”错误的方法。该问题是由于项目配置的Java版本与实际安装的Java版本不符导致。通过修改ProjectFacets中的Java版本设定即可解决。
问题现象：项目图标报错“Java compiler level does not match the version of the installed Java project facet.”。
分析原因：这个是因为Project Facets中的Java版本设定与项目的Java版本设定不一致。
解决方法：（依据ECLIPSE自带的帮助）
Changing the version of a facet
You can change the version of a facet in a J2EE project by editing the facets for the project.
Changing the Java compiler version of a J2EE project involves changing the version of the Java facet. See Changing the Java compiler version for a J2EE project.
1. In the Project Explorer view, right-click the project and then click Properties.
2. In the Properties window, click Project Facets. The Project Facets page lists the facets in the project.
3. Click Add/Remove Project Facets.
4. In the Add/Remove Project Facets window, click the facet you want to change to select it.
5. Select the version of the facet from the drop-down box next to the facet's name.
6. Click Finish.
7. Click OK.
分析原因：这个是因为Project Facets中的Java版本设定与项目的Java版本设定不一致。
解决方法：（依据ECLIPSE自带的帮助）
Changing the version of a facet
You can change the version of a facet in a J2EE project by editing the facets for the project.
Changing the Java compiler version of a J2EE project involves changing the version of the Java facet. See Changing the Java compiler version for a J2EE project.
1. In the Project Explorer view, right-click the project and then click Properties.
2. In the Properties window, click Project Facets. The Project Facets page lists the facets in the project.
3. Click Add/Remove Project Facets.
4. In the Add/Remove Project Facets window, click the facet you want to change to select it.
5. Select the version of the facet from the drop-down box next to the facet's name.
6. Click Finish.
7. Click OK.
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