window–prefenrences–java–installed JRES–选中jdk条目–edit–rt.jar–source Attachment–external location–D:/jdk/src.zip–ok
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window–prefenrences–java–installed JRES–选中jdk条目–edit–rt.jar–source Attachment–external location–D:/jdk/src.zip–ok
https://jingyan.baidu.com/article/0f5fb09904ef056d8334ea23.html
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