Bit operations for Java negative numbers

Source: Internet
Author: User

Tag: Take the inverse of the original code operation pre SYS complement system int negative number

/**
* Calculate the bit operation of negative number
*/
1. -10 >> 2 =?
2. -10 of the original code: 0000 0000 0000 0000 0000 0000 1010 Highest bit representation sign bit
3. -10 anti-code: 1111 1111 1111 1111 1111 1111 1111 0101 symbol is unchanged, other bits opposite
4. -10 Complement: 1111 1111 1111 1111 1111 1111 1111 0110 complement for anti-code plus 1
5. Complement right Shift 2 to: 1111 1111 1111 1111 1111 1111 1111 1101
6. The complement is reversed: 1000 0000 0000 0000 0000 0000 0000 0010
7 Plus one original code: 0000 0000 0000 0000 0000 0000 0011 -3
System.out.println ( -10 >> 2);



-3

Bit operations for Java negative numbers

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