Java by API/java.lang/Math
Содержание
- 1 Math: abs(int value)
- 2 Math.cbrt(double a) Returns the cube root of a double value.
- 3 Math: ceil(float value)
- 4 Math: copySign(double magnitude, double sign)
- 5 Math: cos(double doubleValue)
- 6 Math.E
- 7 Math: exp(double a)
- 8 Math: floor(float value)
- 9 Math: getExponent(double d)
- 10 Math.hypot(double x, double y) Returns sqrt(x2 +y2) without intermediate overflow or underflow.
- 11 Math.log10(double a)
- 12 Math: log(double doubleValue)
- 13 Math: max(int value1, int value2)
- 14 Math: min(double a, double b)
- 15 Math: min(int value1, int value2)
- 16 Math: nextAfter(double start, double direction)
- 17 Math: nextUp(double d)
- 18 Math.PI
- 19 Math: pow(int a, int b)
- 20 Math: random()
- 21 Math.round(double a)
- 22 Math: scalb(double d, int scaleFactor)
- 23 Math.signum(float f)
- 24 Math: sin(double doubleValue)
- 25 Math.sqrt(int intValue)
- 26 Math: tan(double doubleValue)
- 27 Math: toDegrees(double theta)
- 28 Math: toRadians(double theta)
Math: abs(int value)
<source lang="java">
/*
* Output:
Absolute value of -18 is 18
*/
public class MainClass {
public static void main(String args[]) {
System.out.println("Absolute value of -18 is " +
Math.abs(-18));
}
}
</source>
Math.cbrt(double a) Returns the cube root of a double value.
<source lang="java">
public class Main {
public static void main(String[] args) {
int a = 10;
int b = -50;
int c = 3;
double x = 25.0;
double y = 3.0;
double z = 4.0;
System.out.println("abs(b) = " + Math.abs(b));
System.out.println("cbrt(x) = " + Math.cbrt(x));
System.out.println("exp(y) = " + Math.exp(z));
System.out.println("hypot(y, z)= " + Math.hypot(y, z));
System.out.println("log(y) = " + Math.log(y));
System.out.println("log10(y) = " + Math.log10(y));
System.out.println("max(a, b) = " + Math.max(a, b));
System.out.println("min(a, b) = " + Math.min(a, b));
System.out.println("pow(a, c) = " + Math.pow(a, c));
System.out.println("random() = " + Math.random());
System.out.println("signum(b) = " + Math.signum(b));
System.out.println("sqrt(x) = " + Math.sqrt(y));
}
}
</source>
Math: ceil(float value)
<source lang="java">
/*
* Output:
The ceiling of 45.7 is 46.0
*/
public class MainClass {
public static void main(String args[]) {
System.out.println("The ceiling of 45.7 is " +
Math.ceil(45.7));
}
}
</source>
Math: copySign(double magnitude, double sign)
<source lang="java">
public class Main {
public static void main(String[] args) {
// Returns a copySign of the first argument
double d = Math.copySign (1234.56, -1);
System.out.println ("Math.copySign (1234.56, -1) = " + d);
}
}
</source>
Math: cos(double doubleValue)
<source lang="java">
/*
* Output:
cos = 0.9999451693655121
*/
public class MainClass {
public static void main(String args[]) {
double radians = 0.60 * Math.PI/180;
System.out.println("cos = " + Math.cos(radians));
}
}
</source>
Math.E
<source lang="java">
/*
* Output:
E = 2.718281828459045
*/
public class MainClass {
public static void main(String args[]) {
System.out.println("E = " + Math.E);
}
}
</source>
Math: exp(double a)
<source lang="java">
public class Main {
public static void main(String args[]) {
double loanAmount = 0;
double top = 2 * 5 / 1200;
double bot = 1 - Math.exp(5 * (-12) * Math.log(1 + 7 / 1200));
System.out.println(loanAmount);
System.out.println(top);
System.out.println(bot);
}
}
</source>
Math: floor(float value)
<source lang="java">
/*
* Output:
The floor of 45.7 is 45.0
*/
public class MainClass {
public static void main(String args[]) {
System.out.println("The floor of 45.7 is " +
Math.floor(45.7));
}
}
</source>
Math: getExponent(double d)
<source lang="java">
public class Main {
public static void main (String[] args) {
int exp = Math.getExponent (17.0);
System.out.println ("Math.getExponent (17.0) = " + exp);
}
}
</source>
Math.hypot(double x, double y) Returns sqrt(x2 +y2) without intermediate overflow or underflow.
<source lang="java">
public class Main {
public static void main(String[] args) {
int a = 10;
int b = -50;
int c = 3;
double x = 25.0;
double y = 3.0;
double z = 4.0;
System.out.println("abs(b) = " + Math.abs(b));
System.out.println("cbrt(x) = " + Math.cbrt(x));
System.out.println("exp(y) = " + Math.exp(z));
System.out.println("hypot(y, z)= " + Math.hypot(y, z));
System.out.println("log(y) = " + Math.log(y));
System.out.println("log10(y) = " + Math.log10(y));
System.out.println("max(a, b) = " + Math.max(a, b));
System.out.println("min(a, b) = " + Math.min(a, b));
System.out.println("pow(a, c) = " + Math.pow(a, c));
System.out.println("random() = " + Math.random());
System.out.println("signum(b) = " + Math.signum(b));
System.out.println("sqrt(x) = " + Math.sqrt(y));
}
}
</source>
Math.log10(double a)
<source lang="java">
public class Main {
public static void main(String[] args) {
int a = 10;
int b = -50;
int c = 3;
double x = 25.0;
double y = 3.0;
double z = 4.0;
System.out.println("abs(b) = " + Math.abs(b));
System.out.println("cbrt(x) = " + Math.cbrt(x));
System.out.println("exp(y) = " + Math.exp(z));
System.out.println("hypot(y, z)= " + Math.hypot(y, z));
System.out.println("log(y) = " + Math.log(y));
System.out.println("log10(y) = " + Math.log10(y));
System.out.println("max(a, b) = " + Math.max(a, b));
System.out.println("min(a, b) = " + Math.min(a, b));
System.out.println("pow(a, c) = " + Math.pow(a, c));
System.out.println("random() = " + Math.random());
System.out.println("signum(b) = " + Math.signum(b));
System.out.println("sqrt(x) = " + Math.sqrt(y));
}
}
</source>
Math: log(double doubleValue)
<source lang="java">
/*
* Output:
2.5042189608203733
*/
public class MainClass {
public static void main(String args[]) {
System.out.println(Math.log(12.234));
}
}
</source>
Math: max(int value1, int value2)
<source lang="java">
/*
* Output:
Max of -8 and -4 is -4
*/
public class MainClass {
public static void main(String args[]) {
System.out.println("Max of -8 and -4 is " +
Math.max(-8, -4));
}
}
</source>
Math: min(double a, double b)
<source lang="java">
public class Main {
public static void main(String[] args) {
double enrollmentPrice = 45.875;
double closingPrice = 54.375;
System.out.println("Your purchase price is: $"
+ Math.min(enrollmentPrice, closingPrice));
}
}
</source>
Math: min(int value1, int value2)
<source lang="java">
/*
* Output:
Min of -8 and -4 is -8
*/
public class MainClass {
public static void main(String args[]) {
System.out.println("Min of -8 and -4 is " +
Math.min(-8, -4));
}
}
</source>
Math: nextAfter(double start, double direction)
<source lang="java">
public class Main {
public static void main(String[] args) {
// Returns the lesser adjacent of a double
double lesserAdjacent = Math.nextAfter(123.0, 120.0);
System.out.println("Math.nextAfter (123.0, 120.0) = " + lesserAdjacent);
}
}
</source>
Math: nextUp(double d)
<source lang="java">
public class Main {
public static void main(String[] args) {
// Returns the greater adjacent of a double
double greaterAdjacent = Math.nextUp(123.0);
System.out.println("Math.nextUp (123.0) = " + greaterAdjacent);
}
}
</source>
Math.PI
<source lang="java">
/*
* Output:
cos = 0.9999691576447897
*/
public class MainClass {
public static void main(String args[]) {
double radians = 0.45 * Math.PI/180;
System.out.println("cos = " + Math.cos(radians));
}
}
</source>
Math: pow(int a, int b)
<source lang="java">
/*
* Output:
4096.0
*/
public class MainClass {
public static void main(String args[]) {
System.out.println(Math.pow(2, 12));
}
}
</source>
Math: random()
<source lang="java">
/*
* Output:
0.2582865756128041 0.9294301072371337 1.0920958792665798 1.4810070289722757 1.8399471246981638 2.781546148684157 3.5957542851066675 4.113758777037293 4.150439043318967 4.529427701584921 5.512453021311045 6.251471026501456 6.905859639865632 7.2068223631146955 7.921371780218516 8.557002165650722 9.478668455875274 9.595839446980102 9.647163478750608 9.668347992354768 9.683406705822547 10.598477089056646 11.496213016728769 12.132696466140123 13.0249548161124 14.02288245273865 14.50775093575956 14.679130055985258 15.192336964943184 15.502199347000133 16.29952266399552 17.231728021301766 17.468410382732003 17.995911911474966 18.516058447611154 19.103517336900314 19.851387041991664 20.075180702257853
*/
public class MainClass {
public static void main(String args[]) {
double sum = 0;
while(true) {
sum += Math.random();
System.out.println(sum);
if(sum > 20)
break;
}
}
}
</source>
Math.round(double a)
<source lang="java">
public class MainCLass {
public static void main(String[] args) {
double x = 2.4;
double y = 9.5;
double z = -1.3;
System.out.println("round(x) = " + Math.round(x));
System.out.println("round(y) = " + Math.round(y));
System.out.println("round(z) = " + Math.round(z));
System.out.println();
System.out.println("ceil(x) = " + Math.ceil(x));
System.out.println("ceil(y) = " + Math.ceil(y));
System.out.println("ceil(z) = " + Math.ceil(z));
System.out.println();
System.out.println("floor(x) = " + Math.floor(x));
System.out.println("floor(y) = " + Math.floor(y));
System.out.println("floor(z) = " + Math.floor(z));
System.out.println();
System.out.println("rint(x) = " + Math.rint(x));
System.out.println("rint(y) = " + Math.rint(y));
System.out.println("rint(z) = " + Math.rint(z));
}
}
</source>
Math: scalb(double d, int scaleFactor)
<source lang="java">
public class Main {
public static void main(String[] args) {
// Returns 12.0 x (2^3)
double scalbResult = Math.scalb(12.0, 3);
System.out.println("Math.scalb (12.0, 3) = " + scalbResult);
}
}
</source>
Math.signum(float f)
<source lang="java">
public class Main {
public static void main(String[] args) {
int a = 10;
int b = -50;
int c = 3;
double x = 25.0;
double y = 3.0;
double z = 4.0;
System.out.println("abs(b) = " + Math.abs(b));
System.out.println("cbrt(x) = " + Math.cbrt(x));
System.out.println("exp(y) = " + Math.exp(z));
System.out.println("hypot(y, z)= " + Math.hypot(y, z));
System.out.println("log(y) = " + Math.log(y));
System.out.println("log10(y) = " + Math.log10(y));
System.out.println("max(a, b) = " + Math.max(a, b));
System.out.println("min(a, b) = " + Math.min(a, b));
System.out.println("pow(a, c) = " + Math.pow(a, c));
System.out.println("random() = " + Math.random());
System.out.println("signum(b) = " + Math.signum(b));
System.out.println("sqrt(x) = " + Math.sqrt(y));
}
}
</source>
Math: sin(double doubleValue)
<source lang="java">
/*
* Output:
sin = 0.007853900888711334
*/
public class MainClass {
public static void main(String args[]) {
double radians = 0.45 * Math.PI/180;
System.out.println("sin = " + Math.sin(radians));
}
}
</source>
Math.sqrt(int intValue)
<source lang="java">
/*
* Output: * 3.1622776601683795 * */
public class MainClass {
public static void main(String args[]) {
System.out.println(Math.sqrt(10));
}
}
</source>
Math: tan(double doubleValue)
<source lang="java">
/*
* Output:
tan = 0.005236035605700127
*/
public class MainClass {
public static void main(String args[]) {
double radians = 0.30 * Math.PI/180;
System.out.println("tan = " + Math.tan(radians));
}
}
</source>
Math: toDegrees(double theta)
<source lang="java">
/*
* Output:
120.0 degrees is 2.0943951023931953 radians. 1.312 radians is 75.17206272116401 degrees.
* */
public class MainClass {
public static void main(String args[]) {
double theta = 120.0;
System.out.println(theta + " degrees is " +
Math.toRadians(theta) + " radians.");
theta = 1.312;
System.out.println(theta + " radians is " +
Math.toDegrees(theta) + " degrees.");
}
}
</source>
Math: toRadians(double theta)
<source lang="java">
/*
* Output:
120.0 degrees is 2.0943951023931953 radians. 1.312 radians is 75.17206272116401 degrees.
* */
public class MainClass {
public static void main(String args[]) {
double theta = 120.0;
System.out.println(theta + " degrees is " +
Math.toRadians(theta) + " radians.");
theta = 1.312;
System.out.println(theta + " radians is " +
Math.toDegrees(theta) + " degrees.");
}
}
</source>
