Bit Basic


https://gwoham-163-com.iteye.com/blog/2086929
java中,按位或操作符是"^"



java中,按位或操作符是"|"
Java 中,取反操作符用波浪线"~"表示。值得注意的是此操作符与"逻辑非(!)" 操作符不同,"逻辑非"并不是一个位操作。

按位取反
移位是一个二元运算符,用来将一个二进制数中的每一位全部都向一个方向移动指定位,溢出的部分将被舍弃,而空缺的部分填入一定的值。在Java中,左移使用两个小于符号"<<"表示,右移使用两个大于符号">>"表示。">>" 右移,高位补符号位” 这里右移一位表示除2 ">>>" 无符号右移,高位补0”; 与>>类似。
应用逻辑移位时,移位后空缺的部分全部填0.
0001 (十进制 1) << 3 (左移 3 位) = 1000 (十进制 8) 1010 (十进制 10) >> 2 (右移 2 位) = 0010 (十进制 2)



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