本文整理了Java中java.lang.Double.isNaN()
方法的一些代码示例,展示了Double.isNaN()
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。Double.isNaN()
方法的具体详情如下:
包路径:java.lang.Double
类名称:Double
方法名:isNaN
[英]Indicates whether this object is a Not-a-Number (NaN) value.
[中]指示此对象是否为*非数字(NaN)*值。
代码示例来源:origin: google/guava
/** Returns whether any of the values in {@code dataset} are {@code NaN}. */
private static boolean containsNaN(double... dataset) {
for (double value : dataset) {
if (Double.isNaN(value)) {
return true;
}
}
return false;
}
代码示例来源:origin: stackoverflow.com
// 1. static method
if (Double.isNaN(doubleValue)) {
...
}
// 2. object's method
if (doubleObject.isNan()) {
...
}
代码示例来源:origin: org.apache.commons/commons-lang3
/**
* Checks whether the double value is the special NaN value.
*
* @return true if NaN
*/
public boolean isNaN() {
return Double.isNaN(value);
}
代码示例来源:origin: google/guava
/** Returns its argument if it is non-negative, zero if it is negative. */
static double ensureNonNegative(double value) {
checkArgument(!isNaN(value));
if (value > 0.0) {
return value;
} else {
return 0.0;
}
}
代码示例来源:origin: prestodb/presto
private PlanNodeStatsEstimate(double outputRowCount, PMap<Symbol, SymbolStatsEstimate> symbolStatistics)
{
checkArgument(isNaN(outputRowCount) || outputRowCount >= 0, "outputRowCount cannot be negative");
this.outputRowCount = outputRowCount;
this.symbolStatistics = symbolStatistics;
}
代码示例来源:origin: prestodb/presto
public void addValue(double value)
{
nonNullValueCount++;
if (Double.isNaN(value)) {
hasNan = true;
}
else {
minimum = Math.min(value, minimum);
maximum = Math.max(value, maximum);
}
}
代码示例来源:origin: prestodb/presto
public static Estimate of(double value)
{
if (isNaN(value)) {
throw new IllegalArgumentException("value is NaN");
}
if (isInfinite(value)) {
throw new IllegalArgumentException("value is infinite");
}
return new Estimate(value);
}
代码示例来源:origin: prestodb/presto
@Override
protected Number getNormalizedValue()
{
if (value.isNaN() || value.isInfinite()) {
return value;
}
return new BigDecimal(getValue().doubleValue()).round(new MathContext(precision)).doubleValue();
}
}
代码示例来源:origin: prestodb/presto
@Test
public void testGroupByNanMap()
{
MaterializedResult actual = computeActual("SELECT MAP_KEYS(x)[1] FROM (VALUES MAP(ARRAY[nan()], ARRAY[ARRAY[1]]), MAP(ARRAY[nan()], ARRAY[ARRAY[2]])) t(x) GROUP BY 1");
assertTrue(Double.isNaN((Double) actual.getOnlyValue()));
}
代码示例来源:origin: google/guava
/**
* Finish building an instance with the given slope, i.e. the rate of change of {@code y} with
* respect to {@code x}. The slope must not be {@code NaN}. It may be infinite, in which case
* the transformation is vertical. (If it is zero, the transformation is horizontal.)
*/
public LinearTransformation withSlope(double slope) {
checkArgument(!Double.isNaN(slope));
if (isFinite(slope)) {
double yIntercept = y1 - x1 * slope;
return new RegularLinearTransformation(slope, yIntercept);
} else {
return new VerticalLinearTransformation(x1);
}
}
}
代码示例来源:origin: google/guava
public void testFuzzyEqualsZeroTolerance() {
// make sure we test -0 tolerance
for (double zero : Doubles.asList(0.0, -0.0)) {
for (double a : ALL_DOUBLE_CANDIDATES) {
for (double b : ALL_DOUBLE_CANDIDATES) {
assertEquals(
a == b || (Double.isNaN(a) && Double.isNaN(b)), DoubleMath.fuzzyEquals(a, b, zero));
}
}
}
}
代码示例来源:origin: google/guava
public void testIsFinite() {
for (double value : NUMBERS) {
assertEquals(!(Double.isNaN(value) || Double.isInfinite(value)), Doubles.isFinite(value));
}
}
代码示例来源:origin: google/guava
public void testLog2Negative() {
for (double d : POSITIVE_FINITE_DOUBLE_CANDIDATES) {
assertTrue(Double.isNaN(DoubleMath.log2(-d)));
}
}
代码示例来源:origin: google/guava
private static void assertEquivalent(double actual, double expected) {
if (expected == POSITIVE_INFINITY) {
assertThat(actual).isPositiveInfinity();
} else if (expected == NEGATIVE_INFINITY) {
assertThat(actual).isNegativeInfinity();
} else if (Double.isNaN(expected)) {
assertThat(actual).isNaN();
} else {
assertThat(actual).isWithin(ALLOWED_ERROR).of(expected);
}
}
}
代码示例来源:origin: prestodb/presto
public SymbolStatsAssertion distinctValuesCountUnknown()
{
assertTrue(isNaN(statistics.getDistinctValuesCount()), "expected unknown distinctValuesCount but got " + statistics.getDistinctValuesCount());
return this;
}
代码示例来源:origin: prestodb/presto
public SymbolStatsAssertion dataSizeUnknown()
{
assertTrue(isNaN(statistics.getAverageRowSize()), "expected unknown dataSize but got " + statistics.getAverageRowSize());
return this;
}
代码示例来源:origin: google/guava
public void testLog2NaNInfinity() {
assertEquals(Double.POSITIVE_INFINITY, DoubleMath.log2(Double.POSITIVE_INFINITY));
assertTrue(Double.isNaN(DoubleMath.log2(Double.NEGATIVE_INFINITY)));
assertTrue(Double.isNaN(DoubleMath.log2(Double.NaN)));
}
代码示例来源:origin: google/guava
@GwtIncompatible // DoubleMath.isPowerOfTwo, DoubleMath.log2(double, RoundingMode), StrictMath
public void testIsPowerOfTwo() {
for (double x : ALL_DOUBLE_CANDIDATES) {
boolean expected =
x > 0
&& !Double.isInfinite(x)
&& !Double.isNaN(x)
&& StrictMath.pow(2.0, DoubleMath.log2(x, FLOOR)) == x;
assertEquals(expected, DoubleMath.isPowerOfTwo(x));
}
}
代码示例来源:origin: google/guava
public void testMin() {
assertEquals(LEAST, Doubles.min(LEAST));
assertEquals(GREATEST, Doubles.min(GREATEST));
assertEquals(
(double) 0,
Doubles.min(
(double) 8, (double) 6, (double) 7, (double) 5, (double) 3, (double) 0, (double) 9));
assertEquals(-0.0, Doubles.min(-0.0, 0.0));
assertEquals(-0.0, Doubles.min(0.0, -0.0));
assertEquals(LEAST, Doubles.min(NUMBERS));
assertTrue(Double.isNaN(Doubles.min(VALUES)));
}
代码示例来源:origin: google/guava
public void testMax() {
assertEquals(LEAST, Doubles.max(LEAST));
assertEquals(GREATEST, Doubles.max(GREATEST));
assertEquals(
(double) 9,
Doubles.max(
(double) 8, (double) 6, (double) 7, (double) 5, (double) 3, (double) 0, (double) 9));
assertEquals(0.0, Doubles.max(-0.0, 0.0));
assertEquals(0.0, Doubles.max(0.0, -0.0));
assertEquals(GREATEST, Doubles.max(NUMBERS));
assertTrue(Double.isNaN(Doubles.max(VALUES)));
}
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