Example usage for java.lang Float NEGATIVE_INFINITY

Introduction

In this page you can find the example usage for java.lang Float NEGATIVE_INFINITY.

Prototype

float NEGATIVE_INFINITY

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Document

A constant holding the negative infinity of type float .

Usage

From source file:jp.furplag.util.commons.NumberUtilsTest.java

/**
 * {@link jp.furplag.util.commons.NumberUtils#add(java.lang.Number, java.lang.Number)}.
 *///from  w ww  .  j ava 2 s. co m
@SuppressWarnings("unchecked")
@Test
public void testAddTNumber() {
    assertEquals("null", null, add(null, null));
    assertEquals("null", null, add(null, 10));
    assertEquals("null", (Object) 123.456d, add(123.456, 0));
    assertEquals("null", (Object) 123.456f, add(123.456f, 0));
    assertEquals("123 + .456: Float", (Object) 123, add(123, .456f));
    assertEquals("123 + .456: Float", (Object) Double.class, add(123d, .456f).getClass());
    assertEquals("123 + .456: Float", (Object) BigDecimal.class,
            add(BigDecimal.valueOf(123d), .456f).getClass());
    for (Class<?> type : NUMBERS) {
        try {
            Object o = null;
            Number augend = null;
            Class<? extends Number> typeOfN = (Class<? extends Number>) type;
            Class<? extends Number> wrapper = (Class<? extends Number>) ClassUtils.primitiveToWrapper(type);
            if (ClassUtils.isPrimitiveWrapper(wrapper)) {
                o = wrapper.getMethod("valueOf", String.class).invoke(null, "123");
            } else {
                Constructor<?> c = type.getDeclaredConstructor(String.class);
                o = c.newInstance("123");
            }
            assertEquals("123.456: " + type.getSimpleName(), add((Number) o, augend, typeOfN),
                    add((Number) o, augend));
            augend = .456f;
            assertEquals("123.456: " + type.getSimpleName(), add((Number) o, augend, typeOfN),
                    add((Number) o, augend));
            augend = Double.NaN;
            assertEquals("NaN: " + type.getSimpleName(), add((Number) o, augend, typeOfN),
                    add((Number) o, augend));
            augend = Float.NEGATIVE_INFINITY;
            assertEquals("-Infinity: Float: " + type.getSimpleName(), add((Number) o, augend, typeOfN),
                    add((Number) o, augend));
            augend = Double.POSITIVE_INFINITY;
            assertEquals("Infinity: Double: : " + type.getSimpleName(), add((Number) o, augend, typeOfN),
                    add((Number) o, augend));

        } catch (Exception e) {
            e.printStackTrace();
            fail(e.getMessage() + "\n" + Arrays.toString(e.getStackTrace()));
        }
    }
}

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From source file:com.cognitect.transit.TransitMPTest.java

public void testWriteReadSpecialNumbers() throws Exception {
    ByteArrayOutputStream out = new ByteArrayOutputStream();
    Writer w = TransitFactory.writer(TransitFactory.Format.MSGPACK, out);
    w.write(Double.NaN);/*  w  w  w .j av  a  2  s  .  c  o  m*/
    w.write(Float.NaN);
    w.write(Double.POSITIVE_INFINITY);
    w.write(Float.POSITIVE_INFINITY);
    w.write(Double.NEGATIVE_INFINITY);
    w.write(Float.NEGATIVE_INFINITY);
    ByteArrayInputStream in = new ByteArrayInputStream(out.toByteArray());
    Reader r = TransitFactory.reader(TransitFactory.Format.MSGPACK, in);
    assert ((Double) r.read()).isNaN();
    assert ((Double) r.read()).isNaN();
    assertEquals(Double.POSITIVE_INFINITY, (Double) r.read());
    assertEquals(Double.POSITIVE_INFINITY, (Double) r.read());
    assertEquals(Double.NEGATIVE_INFINITY, (Double) r.read());
    assertEquals(Double.NEGATIVE_INFINITY, (Double) r.read());
}

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From source file:org.apache.axis2.databinding.utils.ConverterUtil.java

public static float convertToFloat(String s) {
    if ((s == null) || s.equals("")) {
        return Float.NaN;
    }/*from   w  w  w .j  a v  a 2 s .  c o m*/
    if (s.startsWith("+")) {
        s = s.substring(1);
    }
    if (POSITIVE_INFINITY.equals(s)) {
        return Float.POSITIVE_INFINITY;
    } else if (NEGATIVE_INFINITY.equals(s)) {
        return Float.NEGATIVE_INFINITY;
    }
    return Float.parseFloat(s);
}

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From source file:info.debatty.java.datasets.sift.Matrix.java

public static float max(final float[] A) {
    float maxval = Float.NEGATIVE_INFINITY;
    for (float val : A) {
        if (val > maxval) {
            maxval = val;
        }//  w  ww.ja  va 2s  .  c  om
    }
    return maxval;
}

---

From source file:org.apache.vxquery.runtime.functions.cast.CastToStringOperation.java

public void convertFloatCanonical(FloatPointable floatp, DataOutput dOut) throws SystemException, IOException {
    abvsInner.reset();//from   w w  w . j  av  a  2s . c  o  m
    float value = floatp.getFloat();

    if (Float.isInfinite(value)) {
        if (value == Float.NEGATIVE_INFINITY) {
            FunctionHelper.writeCharSequence("-", dOutInner);
        }
        FunctionHelper.writeCharSequence("INF", dOutInner);
    } else if (Float.isNaN(value)) {
        FunctionHelper.writeCharSequence("NaN", dOutInner);
    } else {
        dOut.write(returnTag);
        dOut.writeUTF(Float.toString(value));
        return;
    }
    sendStringDataOutput(dOut);
}

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From source file:papaya.Rank.java

/** Decide how to proceed with the NaN values */
private static List<Integer> nanStrategy(IntFloatPair[] ranks, int nanStrategy) {
    List<Integer> nanPositions = null;

    // Recode, remove or record positions of NaNs        
    switch (nanStrategy) {
    case MAXIMAL: // Replace NaNs with +INFs
        recodeNaNs(ranks, Float.POSITIVE_INFINITY);
        break;/*from w  w  w.j a v  a2s.  c  o m*/
    case MINIMAL: // Replace NaNs with -INFs
        recodeNaNs(ranks, Float.NEGATIVE_INFINITY);
        break;
    case REMOVED: // Drop NaNs from data
        ranks = removeNaNs(ranks);
        break;
    case FIXED: // Record positions of NaNs
        nanPositions = getNanPositions(ranks);
        break;
    }
    return nanPositions;
}

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From source file:org.caleydo.view.bicluster.elem.GLRootElement.java

/**
 *
 * @param isDimensionThresholds//from   w w  w  .j a  v a2  s. c  o m
 * @param thresholds
 *            bicluster id x threshold
 */
public void setThresholds(EDimension dimension, Map<Integer, Float> thresholds) {
    float thresh = Float.NEGATIVE_INFINITY;
    for (NormalClusterElement elem : allNormalClusters()) {
        int number = elem.getBiClusterNumber();
        if (thresholds.containsKey(number)) {
            float t = thresholds.get(number);
            if (Float.isInfinite(thresh))
                thresh = t;
            if (t != thresh)
                thresh = Float.NaN;
            elem.setThreshold(dimension, t, MyUnboundSpinner.UNBOUND, EThresholdMode.ABS);
        }
    }
    if (!Float.isNaN(thresh) && !Float.isInfinite(thresh)) { // all the same set that in the parameter toolbar
        this.toolbarParam.setThreshold(dimension, thresh);
    }
    updateAllEdges();
}

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From source file:com.opera.core.systems.scope.stp.services.ScopeEcmascriptService.java

/**
 * Parses a reply and returns the result of the script execution.  The result from EcmaScript is
 * converted based on the object types specified by Scope:
 *
 * <dl> <dt>undefined</dt> <dd> The undefined type, returned when no value was found or
 * "undefined" was references.  Will return null. </dd>
 *
 * <dt>true</dt> <dd>Boolean true value.</dd>
 *
 * <dt>false</dt> <dd>Boolean false value.</dd>
 *
 * <dt>NaN</dt> <dd> NaN value (not a number) which cannot be exported to JSON directly.  Will be
 * treated as a number, and returns a {@link Float#NaN} reference. </dd>
 *
 * <dt>Infinity</dt> <dd> Plus infinity value which cannot be exported to JSON directly.  Will be
 * treated as a number, and returns a {@link Float#POSITIVE_INFINITY} reference. </dd>
 *
 * <dt>-Infinity</dt> <dd> Negative infinity value which cannot be exported to JSON directly. Will
 * be treated as a number, and returns a {@link Float#NEGATIVE_INFINITY} reference. </dd>
 *
 * <dt>number</dt> <dd>A number, will return a long or double value depending on its value.</dd>
 *
 * <dt>string</dt> <dd>A string.</dd>
 *
 * <dt>object</dt> <dd> A non-primitive value in EcmaScript, typically a generic object.  This
 * includes functions and arrays. </dd> </dl>
 *
 * @param result the result of a script execution
 * @return the parsed result of a reply/*from w  w w  .j a v a  2  s  .  c om*/
 */
private Object parseEvalReply(EvalResult result) {
    Status status = result.getStatus();

    switch (status) {
    case CANCELLED:
        return null;
    case EXCEPTION:
        throw new ScopeException("EcmaScript exception");
    case NO_MEMORY:
        //releaseObjects();
        throw new ScopeException("Out of memory");
    case FAILURE:
        throw new ScopeException("Could not execute script");
    }

    Value value = result.getValue();
    Type type = value.getType();

    switch (type) {
    case STRING:
        return value.getStr();
    case FALSE:
        return false;
    case TRUE:
        return true;
    case OBJECT:
        return value.getObject();
    case NUMBER:
        return parseNumber(String.valueOf(value.getNumber()));
    case NAN:
        return Float.NaN;
    case MINUS_INFINITY:
        return Float.NEGATIVE_INFINITY;
    case PLUS_INFINITY:
        return Float.POSITIVE_INFINITY;
    case UNDEFINED:
    case NULL:
    default:
        return null;
    }
}

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From source file:com.anhth12.nn.multilayer.MultiLayerNetwork.java

public double reductionRation(INDArray p, double currScore, double score, INDArray gradient) {
    double currentDamp = layerWiseConfiguration.getDampingFactor();
    layerWiseConfiguration.setDampingFactor(0);
    ;/* w w w.ja v  a2s.c  om*/
    INDArray denom = getBackPropRGradient(p);
    denom.muli(0.5).muli(p.mul(denom)).sum(0);
    denom.subi(gradient.mul(p).sum(0));
    double rho = (currScore - score) / (double) denom.getScalar(0).element();
    layerWiseConfiguration.setDampingFactor(currentDamp);
    if (score - currScore > 0) {
        return Float.NEGATIVE_INFINITY;
    }
    return rho;
}

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From source file:com.cognitect.transit.TransitTest.java

public void testSpecialNumbers() throws Exception {
    assertEquals(scalar("\"~zNaN\""), writeJson(Double.NaN));
    assertEquals(scalar("\"~zINF\""), writeJson(Double.POSITIVE_INFINITY));
    assertEquals(scalar("\"~z-INF\""), writeJson(Double.NEGATIVE_INFINITY));

    assertEquals(scalar("\"~zNaN\""), writeJson(Float.NaN));
    assertEquals(scalar("\"~zINF\""), writeJson(Float.POSITIVE_INFINITY));
    assertEquals(scalar("\"~z-INF\""), writeJson(Float.NEGATIVE_INFINITY));

    assertEquals(scalarVerbose("\"~zNaN\""), writeJsonVerbose(Double.NaN));
    assertEquals(scalarVerbose("\"~zINF\""), writeJsonVerbose(Double.POSITIVE_INFINITY));
    assertEquals(scalarVerbose("\"~z-INF\""), writeJsonVerbose(Double.NEGATIVE_INFINITY));

    assertEquals(scalarVerbose("\"~zNaN\""), writeJsonVerbose(Float.NaN));
    assertEquals(scalarVerbose("\"~zINF\""), writeJsonVerbose(Float.POSITIVE_INFINITY));
    assertEquals(scalarVerbose("\"~z-INF\""), writeJsonVerbose(Float.NEGATIVE_INFINITY));
}

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