This class
defines constants for the mathematical values
e
and and defines static methods for floating-point trigonometry,
exponentiation, and other operations. It is the equivalent of the C
<math.h> functions. It also contains
methods for computing minimum and maximum values and for generating
pseudorandom numbers.
Most methods of Math operate on
float and double
floating-point values. Remember
that these values are only approximations of actual real numbers. To
allow implementations to take full advantage of the floating-point
capabilities of a native platform, the methods of
Math are not required to return exactly the same
values on all platforms. In other words, the results returned by
different implementations may differ slightly in the
least-significant bits. As of Java 1.3, applications that require
strict platform-independence of results should use
StrictMath instead.
Java 5.0 adds several methods
including log10( ) to compute the base-ten logarithm,
cbrt( ) to compute the cube root of a number,
and signum( ) to compute
the sign of a number as well as sinh(
)
, cosh( ), and
tanh( ) hyperbolic trigonometric functions.
public final class
Math {
// No Constructor
// Public Constants
public static final double
E ; =2.718281828459045
public static final double
PI ; =3.141592653589793
// Public Class Methods
public static int
abs (int
a );
public static long
abs (long
a );
public static float
abs (float
a );
public static double
abs (double
a );
public static double
acos (double
a );
public static double
asin (double
a );
public static double
atan (double
a );
public static double
atan2 (double
y , double
x );
5.0 public static double
cbrt (double
a );
public static double
ceil (double
a );
public static double
cos (double
a );
5.0 public static double
cosh (double
x );
public static double
exp (double
a );
5.0 public static double
expm1 (double
x );
public static double
floor (double
a );
5.0 public static double
hypot (double
x , double
y );
public static double
IEEEremainder (double
f1 , double
f2 );
public static double
log (double
a );
5.0 public static double
log10 (double
a );
5.0 public static double
log1p (double
x );
public static int
max (int
a , int
b );
public static long
max (long
a , long
b );
public static float
max (float
a , float
b );
public static double
max (double
a , double
b );
public static int
min (int
a , int
b );
public static long
min (long
a , long
b );
public static float
min (float
a , float
b );
public static double
min (double
a , double
b );
public static double
pow (double
a , double
b );
public static double
random ( );
public static double
rint (double
a );
public static int
round (float
a );
public static long
round (double
a );
5.0 public static float
signum (float
f );
5.0 public static double
signum (double
d );
public static double
sin (double
a );
5.0 public static double
sinh (double
x );
public static double
sqrt (double
a );
public static double
tan (double
a );
5.0 public static double
tanh (double
x );
1.2 public static double
toDegrees (double
angrad );
1.2 public static double
toRadians (double
angdeg );
5.0 public static float
ulp (float
f );
5.0 public static double
ulp (double
d );
}