“rt.jar is not on its project's build path”

引用src.zip时、报“rt.jar is not on its project's build path”的解决方法 当经过引用src.zip想看JDK标准类的源码时、有时会报以下错误: “an error occurred while opening the source attachment form ” “jre\lib\rt.jar is not on its project's build path”   解决办法以下:  1. Open project properties.  2. Select Java Build Path node.  3. Select Libraries tab.  4. Remove JRE System Library 一次  5. 再次 Add Library JRE System Library
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