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<HTML><HEAD>  <TITLE>BBS水木清华站∶精华区</TITLE></HEAD><BODY><CENTER><H1>BBS水木清华站∶精华区</H1></CENTER>发信人:&nbsp;KHP&nbsp;(人之初),&nbsp;信区:&nbsp;Java&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<BR>标&nbsp;&nbsp;题:&nbsp;Re:&nbsp;请教java的位运算&nbsp;<BR>发信站:&nbsp;BBS&nbsp;水木清华站&nbsp;(Sun&nbsp;Jun&nbsp;&nbsp;6&nbsp;07:00:21&nbsp;1999)&nbsp;<BR>&nbsp;<BR>【&nbsp;在&nbsp;netwander&nbsp;(星际浪子)&nbsp;的大作中提到:&nbsp;】&nbsp;<BR>∶<I>&nbsp;请问一下,一个64位的长整型整数wi,作如下运算:&nbsp;</I><BR>∶<I>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;wi&amp;0x7ff&nbsp;</I><BR>∶<I>&nbsp;结果是几位数,有没有分正负.&nbsp;</I><BR>∶<I>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;mailt:<A HREF="mailto:xzhj@263.net">xzhj@263.net</A>&nbsp;</I><BR>&nbsp;<BR>结果是长整型,Java里的整数类型都是有符号的&nbsp;<BR>&nbsp;<BR>你这个式子的结果应该是正数&nbsp;<BR>&nbsp;<BR>--&nbsp;<BR>※&nbsp;来源:·BBS&nbsp;水木清华站&nbsp;bbs.net.tsinghua.edu.cn·[FROM:&nbsp;166.111.163.77]&nbsp;<BR><CENTER><H1>BBS水木清华站∶精华区</H1></CENTER></BODY></HTML>

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