java.lang.Math.getExponent()方法的使用及代码示例

x33g5p2x  于2022-01-16 转载在 其他  
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本文整理了Java中java.lang.Math.getExponent()方法的一些代码示例，展示了Math.getExponent()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.getExponent()方法的具体详情如下：
包路径：java.lang.Math
类名称：Math
方法名：getExponent

Math.getExponent介绍

[英]Returns the unbiased base-2 exponent of double d.
[中]返回双d的无偏基2指数。

代码示例

代码示例来源：origin: google/guava

  1. static boolean isNormal(double d) {
  2.  return getExponent(d) >= MIN_EXPONENT;
  3. }

代码示例来源：origin: google/guava

  1. static boolean isFinite(double d) {
  2.  return getExponent(d) <= MAX_EXPONENT;
  3. }

代码示例来源：origin: prestodb/presto

  1. static boolean isFinite(double d) {
  2.  return getExponent(d) <= MAX_EXPONENT;
  3. }

代码示例来源：origin: prestodb/presto

  1. static boolean isNormal(double d) {
  2.  return getExponent(d) >= MIN_EXPONENT;
  3. }

代码示例来源：origin: google/j2objc

  1. static boolean isFinite(double d) {
  2.  return getExponent(d) <= MAX_EXPONENT;
  3. }

代码示例来源：origin: google/j2objc

  1. static boolean isNormal(double d) {
  2.  return getExponent(d) >= MIN_EXPONENT;
  3. }

代码示例来源：origin: robovm/robovm

  1. /**
  2.  * Returns the exponent of float {@code f}.
  3.  * @since 1.6
  4.  */
  5. public static int getExponent(float f) {
  6.   return Math.getExponent(f);
  7. }

代码示例来源：origin: robovm/robovm

  1. /**
  2.  * Returns the exponent of double {@code d}.
  3.  * @since 1.6
  4.  */
  5. public static int getExponent(double d){
  6.   return Math.getExponent(d);
  7. }

代码示例来源：origin: google/guava

  1. static long getSignificand(double d) {
  2.  checkArgument(isFinite(d), "not a normal value");
  3.  int exponent = getExponent(d);
  4.  long bits = doubleToRawLongBits(d);
  5.  bits &= SIGNIFICAND_MASK;
  6.  return (exponent == MIN_EXPONENT - 1) ? bits << 1 : bits | IMPLICIT_BIT;
  7. }

代码示例来源：origin: apache/incubator-druid

  1. @Override
  2.  protected ExprEval eval(double param)
  3.  {
  4.   return ExprEval.of(Math.getExponent(param));
  5.  }
  6. }

代码示例来源：origin: google/j2objc

  1. static long getSignificand(double d) {
  2.  checkArgument(isFinite(d), "not a normal value");
  3.  int exponent = getExponent(d);
  4.  long bits = doubleToRawLongBits(d);
  5.  bits &= SIGNIFICAND_MASK;
  6.  return (exponent == MIN_EXPONENT - 1) ? bits << 1 : bits | IMPLICIT_BIT;
  7. }

代码示例来源：origin: google/guava

  1. /**
  2.  * Returns {@code true} if {@code x} represents a mathematical integer.
  3.  *
  4.  * <p>This is equivalent to, but not necessarily implemented as, the expression {@code
  5.  * !Double.isNaN(x) && !Double.isInfinite(x) && x == Math.rint(x)}.
  6.  */
  7. @GwtIncompatible // java.lang.Math.getExponent, com.google.common.math.DoubleUtils
  8. public static boolean isMathematicalInteger(double x) {
  9.  return isFinite(x)
  10.    && (x == 0.0
  11.      || SIGNIFICAND_BITS - Long.numberOfTrailingZeros(getSignificand(x)) <= getExponent(x));
  12. }

代码示例来源：origin: wildfly/wildfly

  1. static long getSignificand(double d) {
  2.  checkArgument(isFinite(d), "not a normal value");
  3.  int exponent = getExponent(d);
  4.  long bits = doubleToRawLongBits(d);
  5.  bits &= SIGNIFICAND_MASK;
  6.  return (exponent == MIN_EXPONENT - 1) ? bits << 1 : bits | IMPLICIT_BIT;
  7. }

代码示例来源：origin: prestodb/presto

  1. static long getSignificand(double d) {
  2.  checkArgument(isFinite(d), "not a normal value");
  3.  int exponent = getExponent(d);
  4.  long bits = doubleToRawLongBits(d);
  5.  bits &= SIGNIFICAND_MASK;
  6.  return (exponent == MIN_EXPONENT - 1) ? bits << 1 : bits | IMPLICIT_BIT;
  7. }

代码示例来源：origin: google/guava

  1. /**
  2.  * Returns the {@code BigInteger} value that is equal to {@code x} rounded with the specified
  3.  * rounding mode, if possible.
  4.  *
  5.  * @throws ArithmeticException if
  6.  *     <ul>
  7.  *       <li>{@code x} is infinite or NaN
  8.  *       <li>{@code x} is not a mathematical integer and {@code mode} is {@link
  9.  *           RoundingMode#UNNECESSARY}
  10.  *     </ul>
  11.  */
  12. // #roundIntermediate, java.lang.Math.getExponent, com.google.common.math.DoubleUtils
  13. @GwtIncompatible
  14. public static BigInteger roundToBigInteger(double x, RoundingMode mode) {
  15.  x = roundIntermediate(x, mode);
  16.  if (MIN_LONG_AS_DOUBLE - x < 1.0 & x < MAX_LONG_AS_DOUBLE_PLUS_ONE) {
  17.   return BigInteger.valueOf((long) x);
  18.  }
  19.  int exponent = getExponent(x);
  20.  long significand = getSignificand(x);
  21.  BigInteger result = BigInteger.valueOf(significand).shiftLeft(exponent - SIGNIFICAND_BITS);
  22.  return (x < 0) ? result.negate() : result;
  23. }

代码示例来源：origin: prestodb/presto

  1. /**
  2.  * Returns {@code true} if {@code x} represents a mathematical integer.
  3.  *
  4.  * <p>This is equivalent to, but not necessarily implemented as, the expression {@code
  5.  * !Double.isNaN(x) && !Double.isInfinite(x) && x == Math.rint(x)}.
  6.  */
  7. @GwtIncompatible // java.lang.Math.getExponent, com.facebook.presto.jdbc.internal.guava.math.DoubleUtils
  8. public static boolean isMathematicalInteger(double x) {
  9.  return isFinite(x)
  10.    && (x == 0.0
  11.      || SIGNIFICAND_BITS - Long.numberOfTrailingZeros(getSignificand(x)) <= getExponent(x));
  12. }

代码示例来源：origin: prestodb/presto

  1. /**
  2.  * Returns the {@code BigInteger} value that is equal to {@code x} rounded with the specified
  3.  * rounding mode, if possible.
  4.  *
  5.  * @throws ArithmeticException if
  6.  *     <ul>
  7.  *       <li>{@code x} is infinite or NaN
  8.  *       <li>{@code x} is not a mathematical integer and {@code mode} is {@link
  9.  *           RoundingMode#UNNECESSARY}
  10.  *     </ul>
  11.  */
  12. // #roundIntermediate, java.lang.Math.getExponent, com.facebook.presto.jdbc.internal.guava.math.DoubleUtils
  13. @GwtIncompatible
  14. public static BigInteger roundToBigInteger(double x, RoundingMode mode) {
  15.  x = roundIntermediate(x, mode);
  16.  if (MIN_LONG_AS_DOUBLE - x < 1.0 & x < MAX_LONG_AS_DOUBLE_PLUS_ONE) {
  17.   return BigInteger.valueOf((long) x);
  18.  }
  19.  int exponent = getExponent(x);
  20.  long significand = getSignificand(x);
  21.  BigInteger result = BigInteger.valueOf(significand).shiftLeft(exponent - SIGNIFICAND_BITS);
  22.  return (x < 0) ? result.negate() : result;
  23. }

代码示例来源：origin: google/j2objc

  1. /**
  2.  * Returns {@code true} if {@code x} represents a mathematical integer.
  3.  *
  4.  * <p>This is equivalent to, but not necessarily implemented as, the expression {@code
  5.  * !Double.isNaN(x) && !Double.isInfinite(x) && x == Math.rint(x)}.
  6.  */
  7. @GwtIncompatible // java.lang.Math.getExponent, com.google.common.math.DoubleUtils
  8. public static boolean isMathematicalInteger(double x) {
  9.  return isFinite(x)
  10.    && (x == 0.0
  11.      || SIGNIFICAND_BITS - Long.numberOfTrailingZeros(getSignificand(x)) <= getExponent(x));
  12. }

代码示例来源：origin: wildfly/wildfly

  1. /**
  2.  * Returns {@code true} if {@code x} represents a mathematical integer.
  3.  *
  4.  * <p>This is equivalent to, but not necessarily implemented as, the expression {@code
  5.  * !Double.isNaN(x) && !Double.isInfinite(x) && x == Math.rint(x)}.
  6.  */
  7. @GwtIncompatible // java.lang.Math.getExponent, com.google.common.math.DoubleUtils
  8. public static boolean isMathematicalInteger(double x) {
  9.  return isFinite(x)
  10.    && (x == 0.0
  11.      || SIGNIFICAND_BITS - Long.numberOfTrailingZeros(getSignificand(x)) <= getExponent(x));
  12. }

代码示例来源：origin: google/guava

  1. public static int log2(double x, RoundingMode mode) {
  2.  checkArgument(x > 0.0 && isFinite(x), "x must be positive and finite");
  3.  int exponent = getExponent(x);
  4.  if (!isNormal(x)) {
  5.   return log2(x * IMPLICIT_BIT, mode) - SIGNIFICAND_BITS;

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