Java math 函数

JavaMath类提供了几种用于数学计算的方法，例如min()，max()，avg()，sin()，cos()，tan()，round()，ceil()，floor()，abs()等

与某些StrictMath类数字方法不同，Math类的等效函数的所有实现都不能定义为返回逐位相同的结果。在不需要严格的可重复性的情况下，这种放宽允许以更好的性能实现。

如果大小为int或long，并且结果超出值的范围，则方法addExact()，subtractExact()，multipleExact()和toIntExact()会引发ArithmeticException。

对于其他算术运算，例如递增，递减，除法，绝对值和取反溢出仅在具有特定的最小值或最大值的情况下发生。应根据最大值和最小值进行检查。

例子1

输出：

Maximum number of x and y is: 28.0

Square root of y is: 2.0

Power of x and y is: 614656.0

Logarithm of x is: 3.332204510175204

Logarithm of y is: 1.3862943611198906

log10 of x is: 1.4471580313422192

log10 of y is: 0.6020599913279624

log1p of x is: 3.367295829986474

exp of a is: 1.446257064291475E12

expm1 of a is: 1.446257064290475E12

例子2

输出：

Sine value of a is: -0.9880316240928618

Cosine value of a is: 0.15425144988758405

Tangent value of a is: -6.405331196646276

Sine value of a is: NaN

Cosine value of a is: NaN

Tangent value of a is: 1.5374753309166493

Sine value of a is: 5.343237290762231E12

Cosine value of a is: 5.343237290762231E12

Tangent value of a is: 1.0

Java数学方法

java.lang.Math类包含各种用于执行基本数字运算的方法，例如对数，立方根和三角函数等。各种Java数学方法如下：

基本数学方法

Method

Description

Math.abs()

It will return the Absolute value of the given value.

Math.max()

It returns the Largest of two values.

Math.min()

It is used to return the Smallest of two values.

Math.round()

It is used to round of the decimal numbers to the nearest value.

Math.sqrt()

It is used to return the square root of a number.

Math.cbrt()

It is used to return the cube root of a number.

Math.pow()

It returns the value of first argument raised to the power to second argument.

Math.signum()

It is used to find the sign of a given value.

Math.ceil()

It is used to find the smallest integer value that is greater than or equal to the argument or mathematical integer.

Math.copySign()

It is used to find the Absolute value of first argument along with sign specified in second argument.

Math.nextAfter()

It is used to return the floating-point number adjacent to the first argument in the direction of the second argument.

Math.nextUp()

It returns the floating-point value adjacent to d in the direction of positive infinity.

Math.nextDown()

It returns the floating-point value adjacent to d in the direction of negative infinity.

Math.floor()

It is used to find the largest integer value which is less than or equal to the argument and is equal to the mathematical integer of a double value.

Math.floorDiv()

It is used to find the largest integer value that is less than or equal to the algebraic quotient.

Math.random()

It returns a double value with a positive sign, greater than or equal to 0.0 and less than 1.0.

Math.rint()

It returns the double value that is closest to the given argument and equal to mathematical integer.

Math.hypot()

It returns sqrt(x2 +y2) without intermediate overflow or underflow.

Math.ulp()

It returns the size of an ulp of the argument.

Math.getExponent()

It is used to return the unbiased exponent used in the representation of a value.

Math.IEEEremainder()

It is used to calculate the remainder operation on two arguments as prescribed by the IEEE 754 standard and returns value.

Math.addExact()

It is used to return the sum of its arguments, throwing an exception if the result overflows an int or long.

Math.subtractExact()

It returns the difference of the arguments, throwing an exception if the result overflows an int.

Math.multiplyExact()

It is used to return the product of the arguments, throwing an exception if the result overflows an int or long.

Math.incrementExact()

It returns the argument incremented by one, throwing an exception if the result overflows an int.

Math.decrementExact()

It is used to return the argument decremented by one, throwing an exception if the result overflows an int or long.

Math.negateExact()

It is used to return the negation of the argument, throwing an exception if the result overflows an int or long.

Math.toIntExact()

It returns the value of the long argument, throwing an exception if the value overflows an int.

对数数学方法

Method

Description

Math.log()

It returns the natural logarithm of a double value.

Math.log10()

It is used to return the base 10 logarithm of a double value.

Math.log1p()

It returns the natural logarithm of the sum of the argument and 1.

Math.exp()

It returns E raised to the power of a double value, where E is Euler’s number and it is approximately equal to 2.71828.

Math.expm1()

It is used to calculate the power of E and subtract one from it.

三角数学方法

Method

Description

Math.sin()

It is used to return the trigonometric Sine value of a Given double value.

Math.cos()

It is used to return the trigonometric Cosine value of a Given double value.

Math.tan()

It is used to return the trigonometric Tangent value of a Given double value.

Math.asin()

It is used to return the trigonometric Arc Sine value of a Given double value

Math.acos()

It is used to return the trigonometric Arc Cosine value of a Given double value.

Math.atan()

It is used to return the trigonometric Arc Tangent value of a Given double value.

双曲数学方法

Method

Description

Math.sinh()

It is used to return the trigonometric Hyperbolic Cosine value of a Given double value.

Math.cosh()

It is used to return the trigonometric Hyperbolic Sine value of a Given double value.

Math.tanh()

It is used to return the trigonometric Hyperbolic Tangent value of a Given double value.

角数学方法

Method

Description

Math.toDegrees

It is used to convert the specified Radians angle to equivalent angle measured in Degrees.

Math.toRadians

It is used to convert the specified Degrees angle to equivalent angle measured in Radians.

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