Java's math class

Java's math class Java's math class encapsulates a lot of math-related properties and methods, and subsequent encounters commonly used will be directly updated in this blog ...

public static void T2 () {System.out.println (MATH.E);//A double value that is closer to E (that is, the base of the natural logarithm) than any other value.    System.out.println (Math.PI);//is closer to the double value of PI (that is, the ratio of circumference to diameter of the circle) than any other value. /* * 1.abs absolute value function * Absolute value for various data types/SYSTEM.OUT.PRINTLN (Math.Abs (-10));//Output 10/* 2. Trigonometric functions and Inverse trigonometric function * CO s cosine * sin seeking sine * tan seeking tangent * acos Negation cosine * ASIN seeking inverse sine * atan seeking inverse tangent * atan2 (y,x    . OUT.PRINTLN (Math.acos (-1.0));//output Pi 3.14 ... System.out.println (Math.atan2 (1.0, 1.0));//output Π/4 Small value//* 3. Open Radical Root * CBRT (x) Open cubic * sqrt (x) Open square * Hypot (y sqrt (x*x+y*y) is useful sqrt ((x1-x2) ^2+ (y1-y2) ^2)/System.out.println (MATH.SQRT (4.0)) when seeking distance between two points;//Output 2.0 System.out.prin TLN (MATH.CBRT (8.0));//Output 2.0 System.out.println (Math.hypot (3.0, 4.0));//Output 5.0/* * 4. Max. * MAX (A, A, b) for maximum value *     Min (A, b) Minimum value */System.out.println (Math.max (1, 2));//Output 2 System.out.println (Math.min (1.9,-0.2));//output-0.2/* * 5. Logarithm * log (a) A's natural logarithm (base is e) * LOG10 (a) alogarithm of base 10 * log1p (a) a+1 natural logarithm * It is worth noting that other functions previously overloaded, logarithmic operations can only pass double data and return double type data */SYSTEM.OUT.PRINTLN (Math . log (MATH.E));//Output 1.0 System.out.println (MATH.LOG10 (10));//Output 1.0 System.out.println (math.log1p (math.e-1.0));//     Output 1.0/* 6. Power * EXP (x) returns the value of E^x * EXPM1 (x) returns the value of E^x-1 * POW (x, y) returns the value of X^y * The data types available here are also double type  */System.out.println (MATH.EXP (2));//output e^2 value System.out.println (Math.pow (2.0, 3.0));//Output 8.0/* * 7. Random number * Random () returns the double value between [0.0,1.0] * This generates an integer that can actually be obtained by *x control * such as (int) (random*100) after [0,100] */SYSTEM.OUT.PR INTLN ((int) (Math.random () * 100));//output [0,100] random number//ceil (a) returns the floating-point numbers corresponding to the first integer greater than a (the value is integer, the type is floating-point type)///can be converted by casting the type to integral type S Ystem.out.println (Math.ceil (1.3443));//Output 2.0 System.out.println ((int) Math.ceil (1.3443));//Output 2//floor (a) Returns the floating-point number of the first integer less than a (the value is integer, the type is float) System.out.println (Math.floor (1.3443)), or the output 1.0//rint (a) returns the double value of the integer closest to a System  . OUT.PRINTLN (Math.rint (1.2));//Output 1.0  System.out.println (Math.rint (1.8));//Output 2.0} 

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Java's math class