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2018-10-21
Program Development

Data Size

  • 1 bit是1位,0 ~ 1,可表示$2^{1}$个数。
  • 1 Byte是1字节,8 bits,0000 0000 ~ 1111 1111,即0 ~ 255、0x00 ~ 0xFF,可表示$2^{8} = 256$个数。
  • Java中:
类型 长度
byte 1 Byte (FF)
short 2 Bytes (FFFF)
int 4 Bytes (FFFF FFFF)
long 8 Bytes (FFFF FFFF FFFF FFFF)
float 4 Bytes
double 8 Bytes
boolean 1 bit
char 2 Bytes
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