int max(int, int)
long max(long, long)
double max(double, double)
float max(float, float)
傳回2個int、long、double、float參數中的最大值

int min(int, int)
long min(long, long)
double min(double, double)
float min(float, float)
傳回2個int、long、double、float參數中的最小值

double random()
float random()
傳回亂數值，其範圍為0.0~1.0

int round(double)
long round(double)
將double參數值四捨五入後傳回整數值

數學常數
E 自然數e=2.718281828459045
PI 圓周率π=3.141592653589793

int abs(int)
long abs(long)
double abs(double)
float abs(float)
傳回絕對值

double acos(double)反餘弦函數
double asin(double)反正弦函數
double atan(double)反正切函數
double atan2(double1, double2)參數double1/double2的反正切函數值
double ceil(double) 傳回double值大於或等於參數的最小double整數
double cos(double)餘弦函數
double exp(double)自然數的指數ex
double floor(double)傳回double值小於或等於參數的最大double整數
double log(double)自然對數
double pow(double, double)傳回第1個參數為底，第2個參數的次方值
double rint(double)傳回最接近參數的double整數值
double sin(double)正弦函數
double sqrt(double)傳回參數的平方根
double tan(double)正切函數
double toDegrees(double)傳回參數轉換成的角度(Degree)
double toRadians(double)傳回參數轉換成的徑度(Radian)