📅 最后修改于: 2020-09-24 05:47:52 🧑 作者: Mango
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。
public class JavaMathExample1
{
public static void main(String[] args)
{
double x = 28;
double y = 4;
// return the maximum of two numbers
System.out.println("Maximum number of x and y is: " +Math.max(x, y));
// return the square root of y
System.out.println("Square root of y is: " + Math.sqrt(y));
//returns 28 power of 4 i.e. 28*28*28*28
System.out.println("Power of x and y is: " + Math.pow(x, y));
// return the logarithm of given value
System.out.println("Logarithm of x is: " + Math.log(x));
System.out.println("Logarithm of y is: " + Math.log(y));
// return the logarithm of given value when base is 10
System.out.println("log10 of x is: " + Math.log10(x));
System.out.println("log10 of y is: " + Math.log10(y));
// return the log of x + 1
System.out.println("log1p of x is: " +Math.log1p(x));
// return a power of 2
System.out.println("exp of a is: " +Math.exp(x));
// return (a power of 2)-1
System.out.println("expm1 of a is: " +Math.expm1(x));
}
} 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
public class JavaMathExample2
{
public static void main(String[] args)
{
double a = 30;
// converting values to radian
double b = Math.toRadians(a);
// return the trigonometric sine of a
System.out.println("Sine value of a is: " +Math.sin(a));
// return the trigonometric cosine value of a
System.out.println("Cosine value of a is: " +Math.cos(a));
// return the trigonometric tangent value of a
System.out.println("Tangent value of a is: " +Math.tan(a));
// return the trigonometric arc sine of a
System.out.println("Sine value of a is: " +Math.asin(a));
// return the trigonometric arc cosine value of a
System.out.println("Cosine value of a is: " +Math.acos(a));
// return the trigonometric arc tangent value of a
System.out.println("Tangent value of a is: " +Math.atan(a));
// return the hyperbolic sine of a
System.out.println("Sine value of a is: " +Math.sinh(a));
// return the hyperbolic cosine value of a
System.out.println("Cosine value of a is: " +Math.cosh(a));
// return the hyperbolic tangent value of a
System.out.println("Tangent value of a is: " +Math.tanh(a));
}
} 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.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：
| 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. |
| 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. |
| 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. |
| 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. |
| 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. |