Java Utililty Methods Double Number From

List of utility methods to do Double Number From

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Description

The list of methods to do Double Number From are organized into topic(s).

Method

doubletoDoubleAsUnsigned(long v)
to Double As Unsigned 
if (v >= 0)
    return (double) v;
double dbl = v;
dbl += Math.pow(2, 64);
return dbl;
DoubletoDoubleByObject(Object obj)
to Double By Object 
try {
    return Double.valueOf(toStringByObject(obj, true));
} catch (Exception e) {
    return 0.0d;
StringtoDoubleDigit(int number)
to Double Digit 
if (number >= 0 && number < 10) {
    return "0" + ((Integer) number).toString();
return ((Integer) number).toString();
double[][]toDoubleMatrix(Number[][] matrix)
Turns the Number matrix into one consisting of primitive doubles. 
double[][] result;
int i;
int n;
result = new double[matrix.length][];
for (i = 0; i < matrix.length; i++) {
    result[i] = new double[matrix[i].length];
    for (n = 0; n < matrix[i].length; n++)
        result[i][n] = matrix[i][n].doubleValue();
...
DoubletoDoubleObject(Object obj)
Converts an Object to a Double. 
if (obj == null) {
    return null;
if (obj instanceof Double) {
    return (Double) obj;
if (obj instanceof Number) {
    return new Double(((Number) obj).doubleValue());
...
doubletoDoublePow10(long m, int n)
Returns the closest double representation of the specified long number multiplied by a power of ten. 
assert m >= 0;
if (m == 0)
    return 0.0;
if (n >= 0) { 
    if (n > 308)
        return Double.POSITIVE_INFINITY;
    long x0 = 0; 
    long x1 = 0; 
...
doubletoDoublePow2(long m, int n)
Returns the closest double representation of the specified long number multiplied by a power of two. 
assert m >= 0;
if (m == 0)
    return 0.0;
int bitLength = Long.SIZE - Long.numberOfLeadingZeros(m);
int shift = bitLength - 53;
long exp = 1023L + 52 + n + shift; 
if (exp >= 0x7FF)
    return Double.POSITIVE_INFINITY;
...
doubletoDoublePrecision(long fixedPrecisionOrdinate)
Converts the requested coordinate from fixed to double precision. 
double ordinate = (double) fixedPrecisionOrdinate / FIXED_PRECISION_FACTOR;
return ordinate;
double[]toDoublePrimitiveArray(final Double[] wrappedArray)
Returns the primitive double array from wrapper double array 
final double[] array = new double[wrappedArray.length];
for (int i = 0; i < wrappedArray.length; i++) {
    array[i] = wrappedArray[i].intValue();
return array;
StringtoDoubleQuotes(String str)
Takes a string, surrounds it with double-quotes and escapes all double-quotes already in the string according to Unix rules. 
StringBuilder buf = new StringBuilder();
buf.append('"');
if (str != null) {
    int len = str.length();
    for (int i = 0; i < len; i++) {
        char c = str.charAt(i);
        if (c == '"') {
            buf.append('\\');
...