jus.util
Class Calcul

java.lang.Object
  extended by jus.util.Calcul

public class Calcul
extends java.lang.Object

modification de la classe math pour pouvoir l'intancier (pedagogique)


Constructor Summary
Calcul()
           
 
Method Summary
 double abs(double a)
          Returns the absolute value of a double value.
 float abs(float a)
          Returns the absolute value of a float value.
 int abs(int a)
          Returns the absolute value of an int value.
 long abs(long a)
          Returns the absolute value of a long value.
 double acos(double a)
          Returns the arc cosine of an angle, in the range of 0.0 through pi.
 double asin(double a)
          Returns the arc sine of an angle, in the range of -pi/2 through pi/2.
 double atan(double a)
          Returns the arc tangent of an angle, in the range of -pi/2 through pi/2.
 double atan2(double a, double b)
          Converts rectangular coordinates (ba) to polar (r, theta).
 double ceil(double a)
          Returns the smallest (closest to negative infinity) double value that is not less than the argument and is equal to a mathematical integer.
 double cos(double a)
          Returns the trigonometric cosine of an angle.
 double E()
          The double value that is closer than any other to e, the base of the natural logarithms.
 double exp(double a)
          Returns the exponential number e (i.e., 2.718...) raised to the power of a double value.
 double floor(double a)
          Returns the largest (closest to positive infinity) double value that is not greater than the argument and is equal to a mathematical integer.
 double IEEEremainder(double f1, double f2)
          Computes the remainder operation on two arguments as prescribed by the IEEE 754 standard.
 double log(double a)
          Returns the natural logarithm (base e) of a double value.
 double max(double a, double b)
          Returns the greater of two double values.
 float max(float a, float b)
          Returns the greater of two float values.
 int max(int a, int b)
          Returns the greater of two int values.
 long max(long a, long b)
          Returns the greater of two long values.
 double min(double a, double b)
          Returns the smaller of two double values.
 float min(float a, float b)
          Returns the smaller of two float values.
 int min(int a, int b)
          Returns the smaller of two int values.
 long min(long a, long b)
          Returns the smaller of two long values.
 int pgcd(int a, int b)
          retourne le pgcd de 2 nombres entiers
 double PI()
          The double value that is closer than any other to pi, the ratio of the circumference of a circle to its diameter.
 double pow(double a, double b)
          Returns of value of the first argument raised to the power of the second argument.
 double random()
          Returns a random number between 0.0 and 1.0.
 double rint(double a)
          returns the closest integer to the argument.
 long round(double a)
          Returns the closest long to the argument.
 int round(float a)
          Returns the closest int to the argument.
 double sin(double a)
          Returns the trigonometric sine of an angle.
 double sqrt(double a)
          Returns the square root of a double value.
 double tan(double a)
          Returns the trigonometric tangent of an angle.
 
Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

Calcul

public Calcul()
Method Detail

E

public double E()
The double value that is closer than any other to e, the base of the natural logarithms.

Since:
JDK1.0

PI

public double PI()
The double value that is closer than any other to pi, the ratio of the circumference of a circle to its diameter.

Since:
JDK1.0

sin

public double sin(double a)
Returns the trigonometric sine of an angle.

Parameters:
a - an angle, in radians.
Returns:
the sine of the argument.
Since:
JDK1.0

cos

public double cos(double a)
Returns the trigonometric cosine of an angle.

Parameters:
a - an angle, in radians.
Returns:
the cosine of the argument.
Since:
JDK1.0

tan

public double tan(double a)
Returns the trigonometric tangent of an angle.

Parameters:
a - an angle, in radians.
Returns:
the tangent of the argument.
Since:
JDK1.0

asin

public double asin(double a)
Returns the arc sine of an angle, in the range of -pi/2 through pi/2.

Parameters:
a - an angle, in radians.
Returns:
the arc sine of the argument.
Since:
JDK1.0

acos

public double acos(double a)
Returns the arc cosine of an angle, in the range of 0.0 through pi.

Parameters:
a - an angle, in radians.
Returns:
the arc cosine of the argument.
Since:
JDK1.0

atan

public double atan(double a)
Returns the arc tangent of an angle, in the range of -pi/2 through pi/2.

Parameters:
a - an angle, in radians.
Returns:
the arc tangent of the argument.
Since:
JDK1.0

exp

public double exp(double a)
Returns the exponential number e (i.e., 2.718...) raised to the power of a double value.

Parameters:
a - a double value.
Returns:
the value ea, where e is the base of the natural logarithms.
Since:
JDK1.0

log

public double log(double a)
Returns the natural logarithm (base e) of a double value.

Parameters:
a - a number greater than 0.0.
Returns:
the value ln a, the natural logarithm of a.
Since:
JDK1.0

sqrt

public double sqrt(double a)
Returns the square root of a double value.

Parameters:
a - a double value.
Returns:
the square root of a. If the argument is NaN or less than zero, the result is NaN.
Since:
JDK1.0

IEEEremainder

public double IEEEremainder(double f1,
                            double f2)
Computes the remainder operation on two arguments as prescribed by the IEEE 754 standard. The remainder value is mathematically equal to f1 - f2 × n, where n is the mathematical integer closest to the exact mathematical value of the quotient f1/f2, and if two mathematical integers are equally close to f1/f2, then n is the integer that is even. If the remainder is zero, its sign is the same as the sign of the first argument.

Parameters:
f1 - the dividend.
f2 - the divisor.
Returns:
the remainder when f1 is divided by f2.
Since:
JDK1.0

ceil

public double ceil(double a)
Returns the smallest (closest to negative infinity) double value that is not less than the argument and is equal to a mathematical integer.

Parameters:
a - a double value.
Returns:
the smallest (closest to negative infinity) double value that is not less than the argument and is equal to a mathematical integer.
Since:
JDK1.0

floor

public double floor(double a)
Returns the largest (closest to positive infinity) double value that is not greater than the argument and is equal to a mathematical integer.

Parameters:
a - a double value.
Returns:
the largest (closest to positive infinity) double value that is not greater than the argument and is equal to a mathematical integer.
Since:
JDK1.0

rint

public double rint(double a)
returns the closest integer to the argument.

Parameters:
a - a double value.
Returns:
the closest double value to a that is equal to a mathematical integer. If two double values that are mathematical integers are equally close to the value of the argument, the result is the integer value that is even.
Since:
JDK1.0

atan2

public double atan2(double a,
                    double b)
Converts rectangular coordinates (ba) to polar (r, theta). This method computes the phase theta by computing an arc tangent of b/a in the range of -pi to pi.

Parameters:
a - a double value.
b - a double value.
Returns:
the theta component of the point (rtheta) in polar coordinates that corresponds to the point (ba) in Cartesian coordinates.
Since:
JDK1.0

pow

public double pow(double a,
                  double b)
Returns of value of the first argument raised to the power of the second argument.

If (a == 0.0), then b must be greater than 0.0; otherwise an exception is thrown. An exception also will occur if (a <= 0.0) and b is not equal to a whole number.

Parameters:
a - a double value.
b - a double value.
Returns:
the value ab.
Throws:
java.lang.ArithmeticException - if (a == 0.0) and (b <= 0.0), or if (a <= 0.0) and b is not equal to a whole number.
Since:
JDK1.0

round

public int round(float a)
Returns the closest int to the argument.

If the argument is negative infinity or any value less than or equal to the value of Integer.MIN_VALUE, the result is equal to the value of Integer.MIN_VALUE.

If the argument is positive infinity or any value greater than or equal to the value of Integer.MAX_VALUE, the result is equal to the value of Integer.MAX_VALUE.

Parameters:
a - a float value.
Returns:
the value of the argument rounded to the nearest int value.
Since:
JDK1.0
See Also:
Integer.MAX_VALUE, Integer.MIN_VALUE

round

public long round(double a)
Returns the closest long to the argument.

If the argument is negative infinity or any value less than or equal to the value of Long.MIN_VALUE, the result is equal to the value of Long.MIN_VALUE.

If the argument is positive infinity or any value greater than or equal to the value of Long.MAX_VALUE, the result is equal to the value of Long.MAX_VALUE.

Parameters:
a - a double value.
Returns:
the value of the argument rounded to the nearest long value.
Since:
JDK1.0
See Also:
Long.MAX_VALUE, Long.MIN_VALUE

random

public double random()
Returns a random number between 0.0 and 1.0. Random number generators are often referred to as pseudorandom number generators because the numbers produced tend to repeat themselves after a period of time.

Returns:
a pseudorandom double between 0.0 and 1.0.
Since:
JDK1.0
See Also:
Random.nextDouble()

abs

public int abs(int a)
Returns the absolute value of an int value. If the argument is not negative, the argument is returned. If the argument is negative, the negation of the argument is returned.

Note that if the argument is equal to the value of Integer.MIN_VALUE, the most negative representable int value, the result is that same value, which is negative.

Parameters:
a - an int value.
Returns:
the absolute value of the argument.
Since:
JDK1.0
See Also:
Integer.MIN_VALUE

abs

public long abs(long a)
Returns the absolute value of a long value. If the argument is not negative, the argument is returned. If the argument is negative, the negation of the argument is returned.

Note that if the argument is equal to the value of Long.MIN_VALUE, the most negative representable long value, the result is that same value, which is negative.

Parameters:
a - a long value.
Returns:
the absolute value of the argument.
Since:
JDK1.0
See Also:
Long.MIN_VALUE

abs

public float abs(float a)
Returns the absolute value of a float value. If the argument is not negative, the argument is returned. If the argument is negative, the negation of the argument is returned.

Parameters:
a - a float value.
Returns:
the absolute value of the argument.
Since:
JDK1.0

abs

public double abs(double a)
Returns the absolute value of a double value. If the argument is not negative, the argument is returned. If the argument is negative, the negation of the argument is returned.

Parameters:
a - a double value.
Returns:
the absolute value of the argument.
Since:
JDK1.0

max

public int max(int a,
               int b)
Returns the greater of two int values.

Parameters:
a - an int value.
b - an int value.
Returns:
the larger of a and b.
Since:
JDK1.0

max

public long max(long a,
                long b)
Returns the greater of two long values.

Parameters:
a - a long value.
b - a long value.
Returns:
the larger of a and b.
Since:
JDK1.0

max

public float max(float a,
                 float b)
Returns the greater of two float values. If either value is NaN, then the result is NaN. Unlike the the numerical comparison operators, this method considers negative zero to be strictly smaller than positive zero.

Parameters:
a - a float value.
b - a float value.
Returns:
the larger of a and b.
Since:
JDK1.0

max

public double max(double a,
                  double b)
Returns the greater of two double values. If either value is NaN, then the result is NaN. Unlike the the numerical comparison operators, this method considers negative zero to be strictly smaller than positive zero.

Parameters:
a - a double value.
b - a double value.
Returns:
the larger of a and b.
Since:
JDK1.0

min

public int min(int a,
               int b)
Returns the smaller of two int values.

Parameters:
a - an int value.
b - an int value.
Returns:
the smaller of a and b.
Since:
JDK1.0

min

public long min(long a,
                long b)
Returns the smaller of two long values.

Parameters:
a - a long value.
b - a long value.
Returns:
the smaller of a and b.
Since:
JDK1.0

min

public float min(float a,
                 float b)
Returns the smaller of two float values. If either value is NaN, then the result is NaN. Unlike the the numerical comparison operators, this method considers negative zero to be strictly smaller than positive zero.

Parameters:
a - a float value.
b - a float value.
Returns:
the smaller of a and b.
Since:
JDK1.0

min

public double min(double a,
                  double b)
Returns the smaller of two double values. If either value is NaN, then the result is NaN. Unlike the the numerical comparison operators, this method considers negative zero to be strictly smaller than positive zero.

Parameters:
a - a double value.
b - a double value.
Returns:
the smaller of a and b.
Since:
JDK1.0

pgcd

public int pgcd(int a,
                int b)
retourne le pgcd de 2 nombres entiers

Parameters:
a - un entier
b - un entier
Returns:
le pgcd de a et b