static long round(double a):返回最接近参数的long;(相当于四舍五入方法) static int max(int a, int b):返回a与b中较大值; static int min(int a, int b):返回a与b中较小值; static double log10(double a):返回 double值的基数10对数; static double pow(double a, doubl b):a^b; static ...