eclipse 不編譯class文件了,或者是報錯Unbound classpath container: 'JRE System Library

在Problems裏報錯Description Resource Path Location Type Unbound classpath container: 'JRE System Library [jdk1.6.0_21]' in project 'EHMS' EHMS Build path Build Path Problem 啓動的時候還起不來會報一些加載不到類的錯誤，還好通過網上找到了

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