请问sun.misc.Unsafe这个包在哪里下载
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[解决办法]

sun.misc.Unsafe
known versions
final class sun.misc.Unsafe [4858 bytes, jvm >= 1.4 ]
rt.jar
final class sun.misc.Unsafe [5878 bytes, jvm >= 1.5 ]
rt.jar


http://www.jarfinder.com/index.php/java/info/sun.misc.Unsafe

版本好老，你自己看看去吧。