Java.lang.StrictMath class in Java | Set 1
Last Updated :
15 Sep, 2023
StrictMath Class methods helps to perform the numeric operations like square, square root, cube, cube root, exponential and trigonometric operations
Declaration :
public final class StrictMath
extends Object
NaN argument?
A constant holding a Not-a-Number (NaN) value of type double. It is equivalent to the value returned by Double.longBitsToDouble(0x7ff8000000000000L).
Methods of lang.math class :
1. acos() : java.lang.StrictMath.acos() method returns the arc cosine value of the passed argument.
arc cosine is inverse cosine of the argument passed.
acos(arg) = cos-1 of arg
Special Case : Result is NaN, if the argument is NaN or its absolute value is greater than 1.
Syntax:
public static double acos(double a)
Parameters:
a - the argument whose arc cosine value we need.
argument is taken as radian
Returns:
arc cosine value of the argument.
2. abs() : java.lang.StrictMath.abs() method returns the absolute value of any type of the argument passed. This method can handle all the data types.
- Result is positive zero, if the argument is positive zero or negative zero.
- Result is positive infinity if the argument is infinite.
- Result is NaN, if passed argument is NaN.
Syntax:
public static datatype abs(datatype arg)
Parameters:
arg - the argument whose absolute value we need
Returns:
absolute value of the passed argument.
3. toRadians() : java.lang.StrictMath.toRadians(double deg) method converts argument (degree) to radians.
Note: StrictMath class usually takes radians as an input which is very much different in real life applications since angles is usually represented in degrees.
Syntax:
public static double toRadians(double deg)
Parameters:
deg - degree angle needs to be in radian.
Returns:
radians equivalent of the degree-argument passed.
Java code explaining abs(), acos(), toRadians() method in lang.StrictMath class.
Java
// Java program explaining lang.StrictMath class methods
// abs(), acos(), toRadians()
import java.lang.*;
public class NewClass
{
public static void main(String[] args)
{
// Declaring the variables
int Vali = -1;
float Valf = .5f;
// Printing the values
System.out.println("Initial value of int : " + Vali);
System.out.println("Initial value of int : " + Valf);
// Use of .abs() method to get the absoluteValue
int Absi = StrictMath.abs(Vali);
float Absf = StrictMath.abs(Valf);
System.out.println("Absolute value of int : " + Absi);
System.out.println("Absolute value of int : " + Absf);
System.out.println("");
// Use of acos() method
// Value greater than 1, so passing NaN
double Acosi = StrictMath.acos(60);
System.out.println("acos value of Acosi : " + Acosi);
double x = StrictMath.PI;
// Use of toRadian() method
x = StrictMath.toRadians(x);
double Acosj = StrictMath.acos(x);
System.out.println("acos value of Acosj : " + Acosj);
}
}
Output :
Initial value of int : -1
Initial value of int : 0.5
Absolute value of int : 1
Absolute value of int : 0.5
acos value of Acosi : NaN
acos value of Acosj : 1.5159376794536454
4. cbrt() : java.lang.StrictMath.cbrt() method returns the cube root of the passed argument.
Special Point :
- Result is NaN, if the argument is NaN.
- Result is an infinity with the same sign as the argument if the argument is infinite.
- Result is a zero, if the argument is zero.
Syntax:
public static double cbrt(double arg)
Parameters:
arg - argument passed.
Returns:
cube root of the argument passed
5. asin() : java.lang.StrictMath.asin() method returns the arc sine value of the method argument passed. Returned angle is in the range -pi/2 to pi/2.
arc sine is inverse sine of the argument passed.
asin(arg) = sine-1 of arg
Special Case :
- Result is NaN, if the argument is NaN or its absolute value is greater than 1.
- Result is a zero, if the argument is zero.
Syntax:
public static double asin(double arg)
Parameters:
arg - argument passed.
Returns:
arc sine of the argument passed.
Java code explaining asin(), cbrt() method in lang.StrictMath class.
Java
// Java program explaining lang.StrictMath class methods
// asin(), cbrt()
import java.lang.*;
public class NewClass
{
public static void main(String[] args)
{
int a = 1, b = 8;
int radd = a + b;
// Use of asin() method
// Value greater than 1, so passing NaN
double Asini = StrictMath.asin(radd);
System.out.println("asin value of Asini : " + Asini);
double x = StrictMath.PI;
// Use of toRadian() method
x = StrictMath.toRadians(x);
double Asinj = StrictMath.asin(x);
System.out.println("asin value of Asinj : " + Asinj);
System.out.println("");
// Use of cbrt() method
double cbrtval = StrictMath.cbrt(216);
System.out.println("cube root : " + cbrtval);
}
}
Output :
asin value of Asini : NaN
asin value of Asinj : 0.054858647341251204
cube root : 6.0
6. log() : java.lang.StrictMath.log() method returns the logarithmic value of the passed argument.
Syntax:
public static double log(double arg)
Parameters:
arg - argument passed.
Returns:
logarithmic value of the argument passed.
7. hypot() : java.lang.StrictMath.hypot(double p, double b) method returns hypotenuse of a right triangle on passing the triangle's base and perpendicular as arguments.
hypotenuse = [perpendicular2 + base2]1/2
Important Point :
- If either argument is infinite, then the result is positive infinity.
- If either argument is NaN and neither argument is infinite, then the result is NaN.
Syntax:
public static double hypot(double p, double b)
Parameters:
p - perpendicular of the right triangle
b - base of the right triangle
Returns:
hypotenuse of the right triangle
8. floor() : java.lang.StrictMath.floor() method returns the floor value of an argument i.e. the closest integer value which is either less or equal to the passed argument.
eg : 101.23 has floor value = 101
Important point : Same argument is resulted if passed an NaN or infinite argument.
Syntax:
public static double floor(double arg)
Parameters:
arg - the argument whose floor value we need
Returns:closest possible value that is either less than
or equal to the argument passed
9. IEEEremainder() : java.lang.StrictMath.IEEERemainder(double d1, double d2) method returns the remainder value by applying remainder operation on two arguments w.r.t IEEE 754 standard.
Remainder value = d1 - d2 * n
where,
n = closest exact value of d1/d2
Syntax:
public static double IEEEremainder(double d1, double d2)
Parameters:
d1 - dividend
d2 - divisor
Returns:
remainder when f1(dividend) is divided by(divisor)
Java code explaining floor(), hypot(), IEEEremainder(), log() method in lang.StrictMath class.
Java
// Java program explaining lang.MATH class methods
// floor(), hypot(), IEEEremainder(), log()
import java.lang.*;
public class NewClass
{
public static void main(String[] args)
{
// Use of floor method
double f1 = 30.56, f2 = -56.34;
f1 = StrictMath.floor(f1);
System.out.println("Floor value of f1 : " + f1);
f2 = StrictMath.floor(f2);
System.out.println("Floor value of f2 : " + f2);
System.out.println("");
// Use of hypot() method
double p = 12, b = -5;
double h = StrictMath.hypot(p, b);
System.out.println("Hypotenuse : "+h);
System.out.println("");
// Use of IEEEremainder() method
double d1 = 105, d2 = 2;
double r = StrictMath.IEEEremainder(d1, d2);
System.out.println("Remainder : " + r);
System.out.println("");
// Use of log() method
double l = 10;
l = StrictMath.log(l);
System.out.println("Log value of 10 : " + l);
}
}
Output :
Floor value of f1 : 30.0
Floor value of f2 : -57.0
Hypotenuse : 13.0
Remainder : 1.0
Log value of 10 : 2.302585092994046
10. ceil() : java.lang.StrictMath.ceil(double a) method returns the smallest possible value which is either greater or equal to the argument passed. The returned value is a mathematical integer.
- Result is same, if the returned value is already a mathematical integer.
- Result is same, if the passed argument is NaN or infinite or zero.
- Result is negative zero, if the passed argument is less than zero but greater than -1.0
Syntax:
public static double ceil(double arg)
Parameters:
arg - the argument value
Returns:
smallest possible value(mathematical integer)
which is either greater or equal to the argument passed
11. copySign() : java.lang.StrictMath.copySign() method returns first floating-point argument but having the sign of second argument.
Syntax:
public static double copySign(double m, double s)
or
public static float copySign(float m, float s)
Parameters:
m - magnitude
s - sign
Returns:
returns second argument with sign of first floating-point argument.
12. atan() : java.lang.StrictMath.atan() method returns returns the arc tangent of the method argument value. The returned angle is in the range -pi/2 through pi/2.
arc tan is inverse tan of the argument passed.
atan(arg) = tan inverse of arg
Special Case :
- Result is NaN, if the passed argument is NaN or its absolute value is > 1.
- Result is zero, if argument is zero.
Syntax:
public static double atan(double a)
Parameters:
a - the argument whose arc tangent value we need.
argument is taken as radian
Returns:
arc tan value of the argument.
Java code explaining atan(), ceil(), copySign() method in lang.StrictMath class.
Java
// Java program explaining lang.StrictMath class methods
// atan(), ceil(), copySign()
import java.math.*;
public class NewClass
{
public static void main(String[] args)
{
// Use of atan() method
double Atani = StrictMath.atan(0);
System.out.println("atan value of Atani : " + Atani);
double x = StrictMath.PI / 2;
// Use of toRadian() method
x = StrictMath.toRadians(x);
double Atanj = StrictMath.atan(x);
System.out.println("atan value of Atanj : " + Atanj);
System.out.println("");
// Use of ceil() method
double val = 15.34, ceilval;
ceilval = StrictMath.ceil(val);
System.out.println("ceil value of val : " + ceilval);
System.out.println("");
double dblMag = val;
double dblSign1 = 3;
double dblSign2 = -3;
// Use of copySign() method
double result1 = StrictMath.copySign(dblMag, dblSign1);
System.out.println("copySign1 : " + result1);
double result2 = StrictMath.copySign(dblMag, dblSign2);
System.out.println("copySign2 : " + result2);
}
}
Output :
atan value of Atani : 0.0
atan value of Atanj : 0.0274087022410345
ceil value of val : 16.0
copySign1 : 15.34
copySign2 : -15.34
Refer more methods of lang.StrictMath class at : JAva.lang.StrictMath class in Java | Set 2
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