Val James Porcare
1 CpE 1
Commonly Used Methods of the java.lang.Math class
The operators +, -, *, /, and % give us a way to add, subtract, multiply, divide, and "mod" values together
in java, but having to implement some of the more sophisticated functions of mathematics (like the
square root or sine functions) with only these operators would be challenging indeed!
As such, the java.lang.Math class provides us access to many of these functions. The table below lists
some of the more common among these. (There are more than just these in java.lang.Math, however -one should consult the java API for the whole list.)
Method
Returns
Math.sqrt(x)
x−−√x
Math.pow(x,y)
xyxy
Math.sin(x)
sinxsin⁡x
Math.cos(x)
cosxcos⁡x
Math.tan(x)
tanxtan⁡x
Math.asin(x)
sin−1xsin−1⁡x
Math.acos(x)
cos−1xcos−1⁡x
Math.atan(x)
tan−1xtan−1⁡x
Math.exp(x)
exex
Math.log(x)
lnxln⁡x
Math.log10(x)
log10xlog10⁡x
Math.round(x)
the closest integer to x, as athe closest
integer to x, as a long
Math.abs(x)
|x||x|
Math.max(x,y)
The maximum of the two valuesThe
Math.min(x,y)
The minimum of the two valuesThe
maximum of the two values
minimum of the two values
Additionally, the java.lang.Math class provides two very frequently used constants that you might
recognize:
Constant
Type
Value
Math.PI
double
3.14159265358979323846
Math.E
double
2.7182818284590452354