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Math class methods in Java with Examples | Set 2

Last Updated : 13 May, 2022
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java.math class and its methods | Set 1

java.math class methods
java.math class methods discussed in this article :

  1. abs() : java.math.abs() method returns the absolute value of any type of argument passed. This method can handle all the data types.
      Special Case :

    • 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.
    
  2. acos() : java.math.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.
    
  3. toRadians() : java.math.toRadians(double deg) method converts argument (degree) to radians.
    Special Point : Math 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.
    
  4. What is 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).

    Java code explaining abs(), acos(), toRadians() method in Math class.




    // Java program explaining Math class methods
    // abs(), acos(), toRadians()
    import java.math.*;
    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 = Math.abs(Vali);
            float Absf = Math.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 = Math.acos(60);
            System.out.println("acos value of Acosi : "+Acosi);
            double x = Math.PI;
      
            // Use of toRadian() method
            x = Math.toRadians(x);
            double Acosj = Math.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
    
  5. addExact() : java.math.addExact(int a, int b) method returns the sum of the passed arguments.
    Special point : If Result overflows an int or long (according to the passed argument), the method throws ArithmeticException.
    Syntax:

    public static int addExact(int x, int y)
                    or
    public static long addExact(long x, long y)
    Parameters:
    a - first value
    b - second value
    Returns:
    Sum of the specified method arguments - a and b.
    
  6. asin() : java.math.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.
    
  7. cbrt() : java.math.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
    
  8. Java code explaining addExact(), asin(), cbrt() method in Math class.




    // Java program explaining Math class methods
    // addExact(), asin(), cbrt()
    import java.math.*;
    public class NewClass
    {
      
        public static void main(String[] args)
        {
            int a = 1, b = 8;
      
            // get the result of addExact method
            int radd = Math.addExact(a,b);
            System.out.println("Using addExact() : "+radd);
            System.out.println("");
      
            // Use of acos() method
            // Value greater than 1, so passing NaN
            double Asini = Math.asin(radd);
            System.out.println("asin value of Asini : "+Asini);
            double x = Math.PI;
      
            // Use of toRadian() method
            x = Math.toRadians(x);
            double Asinj = Math.asin(x);
            System.out.println("asin value of Asinj : "+Asinj);
            System.out.println("");
      
            // Use of cbrt() method
            double cbrtval = Math.cbrt(216);
            System.out.println("cube root : "+cbrtval);
      
        }
    }

    
    

    Output:

    Using addExact() : 9
    
    acos value of Asini : NaN
    acos value of Asinj : 0.054858647341251204
    
    cube root : 6.0
    
  9. floor() : java.math.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
    
  10. hypot() : java.math.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
    
  11. IEEEremainder() : java.math.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)
    
  12. log() : java.math.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.
    
  13. Java code explaining floor(), hypot(), IEEEremainder(), log() method in Math class.




    // Java program explaining 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 =Math.floor(f1);
            System.out.println("Floor value of f1 : "+f1);
      
            f2 =Math.floor(f2);
            System.out.println("Floor value of f2 : "+f2);
            System.out.println("");
      
            // Use of hypot() method
            double p = 12, b = -5;
            double h = Math.hypot(p, b);
            System.out.println("Hypotenuse : "+h);
            System.out.println("");
      
            // Use of IEEEremainder() method
            double d1 = 105, d2 = 2;
            double r = Math.IEEEremainder(d1,d2);
            System.out.println("Remainder : "+r);
            System.out.println("");
              
            // Use of log() method
            double l = 10;
            l = Math.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
    

    java.math class and its methods | Set 3



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