java.lang.Math.nextDown()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.nextDown()方法的一些代码示例，展示了Math.nextDown()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.nextDown()方法的具体详情如下：
包路径：java.lang.Math
类名称：Math
方法名：nextDown

Math.nextDown介绍

暂无

代码示例

代码示例来源：origin: org.apache.lucene/lucene-core

  1. /**
  2.  * Return the greatest float that compares less than {@code f} consistently
  3.  * with {@link Float#compare}. The only difference with
  4.  * {@link Math#nextDown(float)} is that this method returns {@code -0f} when
  5.  * the argument is {@code +0f}.
  6.  */
  7. public static float nextDown(float f) {
  8.  if (Float.floatToIntBits(f) == 0) { // +0f
  9.   return -0f;
  10.  }
  11.  return Math.nextDown(f);
  12. }

代码示例来源：origin: org.apache.lucene/lucene-core

  1. /**
  2.  * Return the greatest double that compares less than {@code d} consistently
  3.  * with {@link Double#compare}. The only difference with
  4.  * {@link Math#nextDown(double)} is that this method returns {@code -0d} when
  5.  * the argument is {@code +0d}.
  6.  */
  7. public static double nextDown(double d) {
  8.  if (Double.doubleToLongBits(d) == 0L) { // +0d
  9.   return -0f;
  10.  }
  11.  return Math.nextDown(d);
  12. }

代码示例来源：origin: google/error-prone

  1. @Override
  2. Float nextNumber(Number actual) {
  3.  float number = actual.floatValue();
  4.  return Math.min(Math.nextUp(number) - number, number - Math.nextDown(number));
  5. }

代码示例来源：origin: google/error-prone

  1. @Override
  2. Double nextNumber(Number actual) {
  3.  double number = actual.doubleValue();
  4.  return Math.min(Math.nextUp(number) - number, number - Math.nextDown(number));
  5. }

代码示例来源：origin: org.apache.lucene/lucene-core

  1. /**
  2.  * Quantizes double (64 bit) latitude into 32 bits (rounding down: in the direction of -90)
  3.  * @param latitude latitude value: must be within standard +/-90 coordinate bounds.
  4.  * @return encoded value as a 32-bit {@code int}
  5.  * @throws IllegalArgumentException if latitude is out of bounds
  6.  */
  7. public static int encodeLatitude(double latitude) {
  8.  checkLatitude(latitude);
  9.  // the maximum possible value cannot be encoded without overflow
  10.  if (latitude == 90.0D) {
  11.   latitude = Math.nextDown(latitude);
  12.  }
  13.  return (int) Math.floor(latitude / LAT_DECODE);
  14. }

代码示例来源：origin: org.apache.lucene/lucene-core

  1. /**
  2.  * Quantizes double (64 bit) longitude into 32 bits (rounding down: in the direction of -180)
  3.  * @param longitude longitude value: must be within standard +/-180 coordinate bounds.
  4.  * @return encoded value as a 32-bit {@code int}
  5.  * @throws IllegalArgumentException if longitude is out of bounds
  6.  */
  7. public static int encodeLongitude(double longitude) {
  8.  checkLongitude(longitude);
  9.  // the maximum possible value cannot be encoded without overflow
  10.  if (longitude == 180.0D) {
  11.   longitude = Math.nextDown(longitude);
  12.  }
  13.  return (int) Math.floor(longitude / LON_DECODE);
  14. }

代码示例来源：origin: org.apache.lucene/lucene-core

  1. /**
  2.  * Quantizes double (64 bit) longitude into 32 bits (rounding up: in the direction of +180)
  3.  * @param longitude longitude value: must be within standard +/-180 coordinate bounds.
  4.  * @return encoded value as a 32-bit {@code int}
  5.  * @throws IllegalArgumentException if longitude is out of bounds
  6.  */
  7. public static int encodeLongitudeCeil(double longitude) {
  8.  GeoUtils.checkLongitude(longitude);
  9.  // the maximum possible value cannot be encoded without overflow
  10.  if (longitude == 180.0D) {
  11.   longitude = Math.nextDown(longitude);
  12.  }
  13.  return (int) Math.ceil(longitude / LON_DECODE);
  14. }

代码示例来源：origin: org.apache.lucene/lucene-core

  1. /**
  2.  * Quantizes double (64 bit) latitude into 32 bits (rounding up: in the direction of +90)
  3.  * @param latitude latitude value: must be within standard +/-90 coordinate bounds.
  4.  * @return encoded value as a 32-bit {@code int}
  5.  * @throws IllegalArgumentException if latitude is out of bounds
  6.  */
  7. public static int encodeLatitudeCeil(double latitude) {
  8.  GeoUtils.checkLatitude(latitude);
  9.  // the maximum possible value cannot be encoded without overflow
  10.  if (latitude == 90.0D) {
  11.   latitude = Math.nextDown(latitude);
  12.  }
  13.  return (int) Math.ceil(latitude / LAT_DECODE);
  14. }

代码示例来源：origin: vavr-io/vavr

  1. @GwtIncompatible("Math::nextUp is not implemented")
  2.   static BigDecimal asDecimal(double number) {
  3.     if (number == NEGATIVE_INFINITY) {
  4.       final BigDecimal result = BigDecimal.valueOf(Math.nextUp(NEGATIVE_INFINITY));
  5.       return result.subtract(INFINITY_DISTANCE.get());
  6.     } else if (number == POSITIVE_INFINITY) {
  7.       final BigDecimal result = BigDecimal.valueOf(Math.nextDown(POSITIVE_INFINITY));
  8.       return result.add(INFINITY_DISTANCE.get());
  9.     } else {
  10.       return BigDecimal.valueOf(number);
  11.     }
  12.   }
  13. }

代码示例来源：origin: prestodb/presto

  1. @ScalarOperator(SATURATED_FLOOR_CAST)
  2. @SqlType(StandardTypes.REAL)
  3. public static strictfp long saturatedFloorCastToFloat(@SqlType(StandardTypes.DOUBLE) double value)
  4. {
  5.   float result;
  6.   float minFloat = -1.0f * Float.MAX_VALUE;
  7.   if (value <= minFloat) {
  8.     result = minFloat;
  9.   }
  10.   else if (value >= Float.MAX_VALUE) {
  11.     result = Float.MAX_VALUE;
  12.   }
  13.   else {
  14.     result = (float) value;
  15.     if (result > value) {
  16.       result = Math.nextDown(result);
  17.     }
  18.     checkState(result <= value);
  19.   }
  20.   return floatToRawIntBits(result);
  21. }

代码示例来源：origin: vavr-io/vavr

  1. @GwtIncompatible
  2. static Iterator<Double> rangeClosedBy(double from, double toInclusive, double step) {
  3.   if (from == toInclusive) {
  4.     return of(from);
  5.   }
  6.   final double toExclusive = (step > 0) ? Math.nextUp(toInclusive) : Math.nextDown(toInclusive);
  7.   return rangeBy(from, toExclusive, step);
  8. }

代码示例来源：origin: prestodb/presto

  1. @Test
  2. public void testCastToBigint()
  3. {
  4.   assertFunction("cast(37.7E0 as bigint)", BIGINT, 38L);
  5.   assertFunction("cast(-37.7E0 as bigint)", BIGINT, -38L);
  6.   assertFunction("cast(17.1E0 as bigint)", BIGINT, 17L);
  7.   assertFunction("cast(-17.1E0 as bigint)", BIGINT, -17L);
  8.   assertFunction("cast(9.2E18 as bigint)", BIGINT, 9200000000000000000L);
  9.   assertFunction("cast(-9.2E18 as bigint)", BIGINT, -9200000000000000000L);
  10.   assertFunction("cast(2.21E9 as bigint)", BIGINT, 2210000000L);
  11.   assertFunction("cast(-2.21E9 as bigint)", BIGINT, -2210000000L);
  12.   assertFunction("cast(17.5E0 as bigint)", BIGINT, 18L);
  13.   assertFunction("cast(-17.5E0 as bigint)", BIGINT, -18L);
  14.   assertFunction("cast(" + Math.nextDown(0x1.0p63) + " as bigint)", BIGINT, (long) Math.nextDown(0x1.0p63));
  15.   assertInvalidFunction("cast(" + 0x1.0p63 + " as bigint)", INVALID_CAST_ARGUMENT);
  16.   assertInvalidFunction("cast(" + Math.nextUp(0x1.0p63) + " as bigint)", INVALID_CAST_ARGUMENT);
  17.   assertInvalidFunction("cast(" + Math.nextDown(-0x1.0p63) + " as bigint)", INVALID_CAST_ARGUMENT);
  18.   assertFunction("cast(" + -0x1.0p63 + " as bigint)", BIGINT, (long) -0x1.0p63);
  19.   assertFunction("cast(" + Math.nextUp(-0x1.0p63) + " as bigint)", BIGINT, (long) Math.nextUp(-0x1.0p63));
  20.   assertInvalidFunction("cast(9.3E18 as bigint)", INVALID_CAST_ARGUMENT);
  21.   assertInvalidFunction("cast(-9.3E18 as bigint)", INVALID_CAST_ARGUMENT);
  22.   assertInvalidFunction("cast(infinity() as bigint)", INVALID_CAST_ARGUMENT);
  23.   assertInvalidFunction("cast(-infinity() as bigint)", INVALID_CAST_ARGUMENT);
  24.   assertInvalidFunction("cast(nan() as bigint)", INVALID_CAST_ARGUMENT);
  25. }

代码示例来源：origin: org.elasticsearch/elasticsearch

  1. @Override
  2. public Query containsQuery(String field, Object from, Object to, boolean includeFrom, boolean includeTo) {
  3.   return DoubleRange.newContainsQuery(field,
  4.     new double[] {includeFrom ? (Double)from : Math.nextUp((Double)from)},
  5.     new double[] {includeTo ? (Double)to : Math.nextDown((Double)to)});
  6. }
  7. @Override

代码示例来源：origin: org.elasticsearch/elasticsearch

  1. @Override
  2. public Query containsQuery(String field, Object from, Object to, boolean includeFrom, boolean includeTo) {
  3.   return FloatRange.newContainsQuery(field,
  4.     new float[] {includeFrom ? (Float)from : Math.nextUp((Float)from)},
  5.     new float[] {includeTo ? (Float)to : Math.nextDown((Float)to)});
  6. }
  7. @Override

代码示例来源：origin: org.elasticsearch/elasticsearch

  1. @Override
  2. public Query withinQuery(String field, Object from, Object to, boolean includeFrom, boolean includeTo) {
  3.   return DoubleRange.newWithinQuery(field,
  4.     new double[] {includeFrom ? (Double)from : Math.nextUp((Double)from)},
  5.     new double[] {includeTo ? (Double)to : Math.nextDown((Double)to)});
  6. }
  7. @Override

代码示例来源：origin: org.elasticsearch/elasticsearch

  1. @Override
  2.   public Query intersectsQuery(String field, Object from, Object to, boolean includeFrom, boolean includeTo) {
  3.     return DoubleRange.newIntersectsQuery(field,
  4.       new double[] {includeFrom ? (Double)from : Math.nextUp((Double)from)},
  5.       new double[] {includeTo ? (Double)to : Math.nextDown((Double)to)});
  6.   }
  7. },

代码示例来源：origin: org.elasticsearch/elasticsearch

  1. @Override
  2. public Query withinQuery(String field, Object from, Object to, boolean includeFrom, boolean includeTo) {
  3.   return FloatRange.newWithinQuery(field,
  4.     new float[] {includeFrom ? (Float)from : Math.nextUp((Float)from)},
  5.     new float[] {includeTo ? (Float)to : Math.nextDown((Float)to)});
  6. }
  7. @Override

代码示例来源：origin: org.elasticsearch/elasticsearch

  1. @Override
  2.   public Query intersectsQuery(String field, Object from, Object to, boolean includeFrom, boolean includeTo) {
  3.     return FloatRange.newIntersectsQuery(field,
  4.       new float[] {includeFrom ? (Float)from : Math.nextUp((Float)from)},
  5.       new float[] {includeTo ? (Float)to : Math.nextDown((Float)to)});
  6.   }
  7. },

代码示例来源：origin: rnewson/couchdb-lucene

  1. @Override
  2. public Query toRangeQuery(final String name, final String lower, final String upper,
  3.              final boolean lowerInclusive, final boolean upperInclusive) {
  4.   return DoublePoint.newRangeQuery(name,
  5.                    lowerInclusive ? toDouble(lower) : Math.nextUp(toDouble(lower)),
  6.                    upperInclusive ? toDouble(upper) : Math.nextDown(toDouble(upper)));
  7. }

代码示例来源：origin: rnewson/couchdb-lucene

  1. @Override
  2. public Query toRangeQuery(final String name, final String lower, final String upper,
  3.              final boolean lowerInclusive, final boolean upperInclusive) {
  4.   return FloatPoint.newRangeQuery(name,
  5.                   lowerInclusive ? toFloat(lower) : Math.nextUp(toFloat(lower)),
  6.                   upperInclusive ? toFloat(upper) : Math.nextDown(toFloat(upper)));
  7. }

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