byte[] bys = {0x08,0x12,0x23,0x11};
long len = 0;
for (int i = 0; i < 4; i++){
len += (long)((bys[i] << ((3-i) * 8)));
}
System.out.println(len);
可知 : len == 0x08122311
long len = 0;
for (int i = 0; i < 4; i++){
len += (long)((bys[i] << ((3-i) * 8)));
}
System.out.println(len);
可知 : len == 0x08122311
long ret = 0;
String retS ="";
for (int i=index; i<index+len; i++){
int j=(i-index);
ret = ret+(num[i]>=0?num[i]:(256+num[i]))*(int)Math.pow(16,j*2);
} retS= Long.toString(ret);
return retS;
}