计算身份证最后一位

public static char doVerify(String id) { 
char pszSrc[] = id.toCharArray(); 
int iS = 0; 
int iW[] = { 7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2 }; 
char szVerCode[] = new char[] { '1', '0', 'X', '9', '8', '7', '6', '5', 
'4', '3', '2' }; 
int i; 
for (i = 0; i < 17; i++) { 
iS += (int) (pszSrc[i] - '0') * iW[i]; 
} 
int iY = iS % 11; 
return szVerCode[iY]; 
}