java - RandomAccessFile为什么位移4次就能写入一个Int?

PHP中文网2017-04-18 10:41:19

aaaaaaaabbbbbbbbccccccccdddddddd
>>>24
000000000000000000000000aaaaaaaa
&FF
000000000000000000000000aaaaaaaa

aaaaaaaabbbbbbbbccccccccdddddddd
>>> 16
0000000000000000aaaaaaaabbbbbbbb
&FF
000000000000000000000000bbbbbbbb

aaaaaaaabbbbbbbbccccccccdddddddd
>>> 8
00000000aaaaaaaabbbbbbbbcccccccc
&FF
000000000000000000000000cccccccc

aaaaaaaabbbbbbbbccccccccdddddddd
>>>0
aaaaaaaabbbbbbbbccccccccdddddddd
&FF
000000000000000000000000dddddddd

黄舟2017-04-18 10:41:19

就像第一个答案一样，0xFF屏蔽位将高24位的数据都屏蔽掉了，所以不存在重复