本文整理了Java中java.lang.Math类的一些代码示例，展示了Math类的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Math类的具体详情如下：
包路径：java.lang.Math
类名称：Math
[英]Class Math provides basic math constants and operations such as trigonometric functions, hyperbolic functions, exponential, logarithms, etc.
[中]数学类提供基本的数学常数和运算，如三角函数、双曲函数、指数、对数等。
代码示例来源：origin: google/guava
private static byte[] combineBuffers(Deque<byte[]> bufs, int totalLen) {
byte[] result = new byte[totalLen];
int remaining = totalLen;
while (remaining > 0) {
byte[] buf = bufs.removeFirst();
int bytesToCopy = Math.min(remaining, buf.length);
int resultOffset = totalLen - remaining;
System.arraycopy(buf, 0, result, resultOffset, bytesToCopy);
remaining -= bytesToCopy;
}
return result;
}代码示例来源：origin: stackoverflow.com
jQuery.fn.center = function () {
this.css("position","absolute");
this.css("top", Math.max(0, (($(window).height() - $(this).outerHeight()) / 2) +
$(window).scrollTop()) + "px");
this.css("left", Math.max(0, (($(window).width() - $(this).outerWidth()) / 2) +
$(window).scrollLeft()) + "px");
return this;
}代码示例来源：origin: libgdx/libgdx
/** Returns the distance between the given line and point. Note the specified line is not a line segment. */
public static float distanceLinePoint (float startX, float startY, float endX, float endY, float pointX, float pointY) {
float normalLength = (float)Math.sqrt((endX - startX) * (endX - startX) + (endY - startY) * (endY - startY));
return Math.abs((pointX - startX) * (endY - startY) - (pointY - startY) * (endX - startX)) / normalLength;
}代码示例来源：origin: stackoverflow.com
value = 5.5
Math.floor(value) // 5
Math.ceil(value) // 6
Math.round(value) // 6
Math.trunc(value) // 5
parseInt(value) // 5
~~value // 5
value | 0 // 5
value >> 0 // 5
value >>> 0 // 5
value - value % 1 // 5代码示例来源：origin: stackoverflow.com
public static String humanReadableByteCount(long bytes, boolean si) {
int unit = si ? 1000 : 1024;
if (bytes < unit) return bytes + " B";
int exp = (int) (Math.log(bytes) / Math.log(unit));
String pre = (si ? "kMGTPE" : "KMGTPE").charAt(exp-1) + (si ? "" : "i");
return String.format("%.1f %sB", bytes / Math.pow(unit, exp), pre);
}代码示例来源：origin: netty/netty
@Override
public EventExecutor next() {
return executors[Math.abs(idx.getAndIncrement() % executors.length)];
}
}代码示例来源：origin: google/guava
/**
* Computes the optimal k (number of hashes per element inserted in Bloom filter), given the
* expected insertions and total number of bits in the Bloom filter.
*
* <p>See http://en.wikipedia.org/wiki/File:Bloom_filter_fp_probability.svg for the formula.
*
* @param n expected insertions (must be positive)
* @param m total number of bits in Bloom filter (must be positive)
*/
@VisibleForTesting
static int optimalNumOfHashFunctions(long n, long m) {
// (m / n) * log(2), but avoid truncation due to division!
return Math.max(1, (int) Math.round((double) m / n * Math.log(2)));
}代码示例来源：origin: libgdx/libgdx
/** Ratio of circumradius to shortest edge as a measure of triangle quality.
* <p>
* Gary L. Miller, Dafna Talmor, Shang-Hua Teng, and Noel Walkington. A Delaunay Based Numerical Method for Three Dimensions:
* Generation, Formulation, and Partition. */
static public float triangleQuality (float x1, float y1, float x2, float y2, float x3, float y3) {
float length1 = (float)Math.sqrt(x1 * x1 + y1 * y1);
float length2 = (float)Math.sqrt(x2 * x2 + y2 * y2);
float length3 = (float)Math.sqrt(x3 * x3 + y3 * y3);
return Math.min(length1, Math.min(length2, length3)) / triangleCircumradius(x1, y1, x2, y2, x3, y3);
}代码示例来源：origin: libgdx/libgdx
/** Calls {@link #cone(float, float, float, float, float, int)} by estimating the number of segments needed for a smooth
* circular base. */
public void cone (float x, float y, float z, float radius, float height) {
cone(x, y, z, radius, height, Math.max(1, (int)(4 * (float)Math.sqrt(radius))));
}代码示例来源：origin: stackoverflow.com
var date1 = new Date("7/13/2010");
var date2 = new Date("12/15/2010");
var timeDiff = Math.abs(date2.getTime() - date1.getTime());
var diffDays = Math.ceil(timeDiff / (1000 * 3600 * 24));
alert(diffDays);代码示例来源：origin: libgdx/libgdx
public float apply (float a) {
if (a <= 0.5f) return (float)Math.pow(a * 2, power) / 2;
return (float)Math.pow((a - 1) * 2, power) / (power % 2 == 0 ? -2 : 2) + 1;
}
}代码示例来源：origin: stackoverflow.com
public static double round(double value, int places) {
if (places < 0) throw new IllegalArgumentException();
long factor = (long) Math.pow(10, places);
value = value * factor;
long tmp = Math.round(value);
return (double) tmp / factor;
}代码示例来源：origin: spring-projects/spring-framework
int calculateCapacity(CharSequence sequence, Charset charset) {
float maxBytesPerChar = this.charsetToMaxBytesPerChar
.computeIfAbsent(charset, cs -> cs.newEncoder().maxBytesPerChar());
float maxBytesForSequence = sequence.length() * maxBytesPerChar;
return (int) Math.ceil(maxBytesForSequence);
}代码示例来源：origin: libgdx/libgdx
@Override
public void update (int screenWidth, int screenHeight, boolean centerCamera) {
Vector2 scaled = scaling.apply(getWorldWidth(), getWorldHeight(), screenWidth, screenHeight);
int viewportWidth = Math.round(scaled.x);
int viewportHeight = Math.round(scaled.y);
// Center.
setScreenBounds((screenWidth - viewportWidth) / 2, (screenHeight - viewportHeight) / 2, viewportWidth, viewportHeight);
apply(centerCamera);
}代码示例来源：origin: google/guava
@GwtIncompatible // #trueLog2, Math.ulp
public void testLog2Accuracy() {
for (double d : POSITIVE_FINITE_DOUBLE_CANDIDATES) {
double dmLog2 = DoubleMath.log2(d);
double trueLog2 = trueLog2(d);
assertTrue(Math.abs(dmLog2 - trueLog2) <= Math.ulp(trueLog2));
}
}代码示例来源：origin: google/guava
private static int sqrtFloor(int x) {
// There is no loss of precision in converting an int to a double, according to
// http://java.sun.com/docs/books/jls/third_edition/html/conversions.html#5.1.2
return (int) Math.sqrt(x);
}代码示例来源：origin: spring-projects/spring-framework
public String getServerId() {
if (this.serverId == null) {
this.serverId = String.valueOf(Math.abs(getUuid().getMostSignificantBits()) % 1000);
}
return this.serverId;
}代码示例来源：origin: stackoverflow.com
value = Number.MAX_SAFE_INTEGER/10 * -1 // -900719925474099.1
Math.floor(value) // -900719925474100
Math.ceil(value) // -900719925474099
Math.round(value) // -900719925474099
Math.trunc(value) // -900719925474099
parseInt(value) // -900719925474099
value | 0 // -858993459
~~value // -858993459
value >> 0 // -858993459
value >>> 0 // 3435973837
value - value % 1 // -900719925474099代码示例来源：origin: libgdx/libgdx
/** Ratio of circumradius to shortest edge as a measure of triangle quality.
* <p>
* Gary L. Miller, Dafna Talmor, Shang-Hua Teng, and Noel Walkington. A Delaunay Based Numerical Method for Three Dimensions:
* Generation, Formulation, and Partition. */
static public float triangleQuality (float x1, float y1, float x2, float y2, float x3, float y3) {
float length1 = (float)Math.sqrt(x1 * x1 + y1 * y1);
float length2 = (float)Math.sqrt(x2 * x2 + y2 * y2);
float length3 = (float)Math.sqrt(x3 * x3 + y3 * y3);
return Math.min(length1, Math.min(length2, length3)) / triangleCircumradius(x1, y1, x2, y2, x3, y3);
}代码示例来源：origin: libgdx/libgdx
/** Calls {@link #cone(float, float, float, float, float, int)} by estimating the number of segments needed for a smooth
* circular base. */
public void cone (float x, float y, float z, float radius, float height) {
cone(x, y, z, radius, height, Math.max(1, (int)(4 * (float)Math.sqrt(radius))));
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