为什么 3 >> 32 等于 3？
Why is 3 >> 32 equal to 3?
why 3 right shift 32 is equal to 3 and not 0.
我在 nodeJs 和 Java
中得到了这些结果
- 3 >> 31 = 0
- 3 >> 32 = 3
- 3 >> 33 = 1
- 3 >> 34 = 0
- 3 >> 35 = 0
这是 Java 语言规范的一部分。右手操作数被换行，因此它始终在 0 - bits 范围内，其中 bits 是左手操作数的位数.由于您要移动 32 位整数，因此右手操作数包含在 0 到 31 之间。32 变为 0，33 变为 1 等
查看 Java language specification for shift operators:
If the promoted type of the left-hand operand is int, only the five lowest-order bits of the right-hand operand are used as the shift distance. It is as if the right-hand operand were subjected to a bitwise logical AND operator & (§15.22.1) with the mask value 0x1f (0b11111). The shift distance actually used is therefore always in the range 0 to 31, inclusive.
why 3 right shift 32 is equal to 3 and not 0.
我在 nodeJs 和 Java
中得到了这些结果- 3 >> 31 = 0
- 3 >> 32 = 3
- 3 >> 33 = 1
- 3 >> 34 = 0
- 3 >> 35 = 0
这是 Java 语言规范的一部分。右手操作数被换行，因此它始终在 0 - bits 范围内，其中 bits 是左手操作数的位数.由于您要移动 32 位整数，因此右手操作数包含在 0 到 31 之间。32 变为 0，33 变为 1 等
查看 Java language specification for shift operators:
If the promoted type of the left-hand operand is int, only the five lowest-order bits of the right-hand operand are used as the shift distance. It is as if the right-hand operand were subjected to a bitwise logical AND operator & (§15.22.1) with the mask value 0x1f (0b11111). The shift distance actually used is therefore always in the range 0 to 31, inclusive.