字节位置法

在JDK或apachecommons(或其他jar)中有类似的东西吗?

/**
 * Return the integer positive value of the byte. (e.g. -128 will return
 * 128; -127 will return 129; -126 will return 130...)
 */
public static int toPositiveInt(byte b) {
int intV = b;
 if (intV < 0) {
     intV = -intV;
     int diff = ((Byte.MAX_VALUE + 1) - intV) + 1;
     intV = Byte.MAX_VALUE + diff;
 }
 return intV;
    }