但是openjdk网站有提供的:
http://hg.openjdk.java.net/jdk8u/jdk8u/jdk/file/6bfaecb8ff77/src/share/classes/
或者直接用百度网盘下载:https://pan.baidu.com/s/1JaX50ETPaneQ-xFut3G--g