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解决办法：
1、eclipse菜单 - Window - Preferences- Java - Installed JREs 将配置的JRE定位到JDK，例如JRE home：D:\Program Files (x86)\Java\jdk1.6.0_45
2、ALT+F5 进行 update project 。
3、Debug or Run again.
No compiler is provided in this environment. Perhaps you are running on a JRE rather than a JDK
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原文地址：http://www.cnblogs.com/gulj/p/5544681.html
