Example usage for java.lang Number doubleValue

Introduction

In this page you can find the example usage for java.lang Number doubleValue.

Prototype

public abstract double doubleValue();

Source Link

Document

Returns the value of the specified number as a double .

Usage

From source file:iDynoOptimizer.MOEAFramework26.src.org.moeaframework.util.tree.NumberArithmetic.java

/**
 * Returns the sign of the number.//from w  w w .ja v a2  s. c o  m
 * 
 * @param a the number
 * @return the sign of the number
 * @see Long#signum(long)
 * @see Math#signum(double)
 */
public static Number sign(Number a) {
    if (isFloatingPoint(a)) {
        return Math.signum(a.doubleValue());
    } else {
        return Long.signum(a.longValue());
    }
}

From source file:com.jeeframework.util.validate.GenericTypeValidator.java

/**
 *  Checks if the value can safely be converted to a float primitive.
 *
 *@param  value   The value validation is being performed on.
 *@param  locale  The locale to use to parse the number (system default if
 *      null)/* w w  w  . j  av  a2 s .  co m*/
 *@return the converted Float value.
 */
public static Float formatFloat(String value, Locale locale) {
    Float result = null;

    if (value != null) {
        NumberFormat formatter = null;
        if (locale != null) {
            formatter = NumberFormat.getInstance(locale);
        } else {
            formatter = NumberFormat.getInstance(Locale.getDefault());
        }
        ParsePosition pos = new ParsePosition(0);
        Number num = formatter.parse(value, pos);

        // If there was no error      and we used the whole string
        if (pos.getErrorIndex() == -1 && pos.getIndex() == value.length()) {
            if (num.doubleValue() >= (Float.MAX_VALUE * -1) && num.doubleValue() <= Float.MAX_VALUE) {
                result = new Float(num.floatValue());
            }
        }
    }

    return result;
}

From source file:com.jeeframework.util.validate.GenericTypeValidator.java

/**
 *  Checks if the value can safely be converted to a double primitive.
 *
 *@param  value   The value validation is being performed on.
 *@param  locale  The locale to use to parse the number (system default if
 *      null)//from  w  ww  . j ava 2s . co  m
 *@return the converted Double value.
 */
public static Double formatDouble(String value, Locale locale) {
    Double result = null;

    if (value != null) {
        NumberFormat formatter = null;
        if (locale != null) {
            formatter = NumberFormat.getInstance(locale);
        } else {
            formatter = NumberFormat.getInstance(Locale.getDefault());
        }
        ParsePosition pos = new ParsePosition(0);
        Number num = formatter.parse(value, pos);

        // If there was no error      and we used the whole string
        if (pos.getErrorIndex() == -1 && pos.getIndex() == value.length()) {
            if (num.doubleValue() >= (Double.MAX_VALUE * -1) && num.doubleValue() <= Double.MAX_VALUE) {
                result = new Double(num.doubleValue());
            }
        }
    }

    return result;
}

From source file:com.jeeframework.util.validate.GenericTypeValidator.java

/**
 *  Checks if the value can safely be converted to a byte primitive.
 *
 *@param  value   The value validation is being performed on.
 *@param  locale  The locale to use to parse the number (system default if
 *      null)//from  w w w. ja va 2s  .  c  o  m
 *@return the converted Byte value.
 */
public static Byte formatByte(String value, Locale locale) {
    Byte result = null;

    if (value != null) {
        NumberFormat formatter = null;
        if (locale != null) {
            formatter = NumberFormat.getNumberInstance(locale);
        } else {
            formatter = NumberFormat.getNumberInstance(Locale.getDefault());
        }
        formatter.setParseIntegerOnly(true);
        ParsePosition pos = new ParsePosition(0);
        Number num = formatter.parse(value, pos);

        // If there was no error      and we used the whole string
        if (pos.getErrorIndex() == -1 && pos.getIndex() == value.length()) {
            if (num.doubleValue() >= Byte.MIN_VALUE && num.doubleValue() <= Byte.MAX_VALUE) {
                result = new Byte(num.byteValue());
            }
        }
    }

    return result;
}

From source file:com.jeeframework.util.validate.GenericTypeValidator.java

/**
 *  Checks if the value can safely be converted to a short primitive.
 *
 *@param  value   The value validation is being performed on.
 *@param  locale  The locale to use to parse the number (system default if
 *      null)vv/*  w  w w.  j ava 2  s  . co  m*/
 *@return the converted Short value.
 */
public static Short formatShort(String value, Locale locale) {
    Short result = null;

    if (value != null) {
        NumberFormat formatter = null;
        if (locale != null) {
            formatter = NumberFormat.getNumberInstance(locale);
        } else {
            formatter = NumberFormat.getNumberInstance(Locale.getDefault());
        }
        formatter.setParseIntegerOnly(true);
        ParsePosition pos = new ParsePosition(0);
        Number num = formatter.parse(value, pos);

        // If there was no error      and we used the whole string
        if (pos.getErrorIndex() == -1 && pos.getIndex() == value.length()) {
            if (num.doubleValue() >= Short.MIN_VALUE && num.doubleValue() <= Short.MAX_VALUE) {
                result = new Short(num.shortValue());
            }
        }
    }

    return result;
}

From source file:com.jeeframework.util.validate.GenericTypeValidator.java

/**
 *  Checks if the value can safely be converted to an int primitive.
 *
 *@param  value   The value validation is being performed on.
 *@param  locale  The locale to use to parse the number (system default if
 *      null)//  w w w  .  j  a  v  a  2 s.  co m
 *@return the converted Integer value.
 */
public static Integer formatInt(String value, Locale locale) {
    Integer result = null;

    if (value != null) {
        NumberFormat formatter = null;
        if (locale != null) {
            formatter = NumberFormat.getNumberInstance(locale);
        } else {
            formatter = NumberFormat.getNumberInstance(Locale.getDefault());
        }
        formatter.setParseIntegerOnly(true);
        ParsePosition pos = new ParsePosition(0);
        Number num = formatter.parse(value, pos);

        // If there was no error      and we used the whole string
        if (pos.getErrorIndex() == -1 && pos.getIndex() == value.length()) {
            if (num.doubleValue() >= Integer.MIN_VALUE && num.doubleValue() <= Integer.MAX_VALUE) {
                result = new Integer(num.intValue());
            }
        }
    }

    return result;
}

From source file:com.jeeframework.util.validate.GenericTypeValidator.java

/**
 *  Checks if the value can safely be converted to a long primitive.
 *
 *@param  value   The value validation is being performed on.
 *@param  locale  The locale to use to parse the number (system default if
 *      null)/*  w ww  . j a v a 2 s  .  c  om*/
 *@return the converted Long value.
 */
public static Long formatLong(String value, Locale locale) {
    Long result = null;

    if (value != null) {
        NumberFormat formatter = null;
        if (locale != null) {
            formatter = NumberFormat.getNumberInstance(locale);
        } else {
            formatter = NumberFormat.getNumberInstance(Locale.getDefault());
        }
        formatter.setParseIntegerOnly(true);
        ParsePosition pos = new ParsePosition(0);
        Number num = formatter.parse(value, pos);

        // If there was no error      and we used the whole string
        if (pos.getErrorIndex() == -1 && pos.getIndex() == value.length()) {
            if (num.doubleValue() >= Long.MIN_VALUE && num.doubleValue() <= Long.MAX_VALUE) {
                result = new Long(num.longValue());
            }
        }
    }

    return result;
}

From source file:de.christianseipl.utilities.maputils.MapMath.java

/**
 * Addiert zu jedem Eintrag in der Map den Wert {@code _value} hinzu.
 * /*from   w w w.ja v a2s. c o m*/
 * @param <K> ein beliebiger Objekttyp
 *            
 * @param _map
 *            Die Ursprungsmap mit den Werten fr den ersten Summanden
 * @param _value
 *            der zweite Summand
 * @return Eine neue Map deren Werte die Summe darstellen.
 */
public static <K> Map<K, Double> add(Map<? extends K, ? extends Number> _map, final double _value) {
    return operateOnMap(_map, new NumberTransformer<K, Double>() {

        @Override
        public Double transform(K _key, Number _number) {
            return _number.doubleValue() + _value;
        }
    });
}

From source file:de.christianseipl.utilities.maputils.MapMath.java

/**
 * Addiert zwei Maps und liefert eine neue Map mit der paarweisen
 * Addition der Werte./*from w  ww  . j  av a 2  s. c o m*/
 * 
 * @param <K> ein beliebiger Objekttyp
 * @param _this Die Ursprungsmap mit den Werten fr den ersten Summanden
 * @param _that Die Ursprungsmap mit den Werten fr den zweiten Summanden
 * @return Eine neue Map mit den neuen Werten
 */
public static <K> Map<K, Double> add(Map<? extends K, ? extends Number> _this,
        final Map<? extends K, ? extends Number> _that) {
    return operateOnMap(_this, new NumberTransformer<K, Double>() {

        @Override
        public Double transform(K _key, Number _number) {
            return _number.doubleValue() + _that.get(_key).doubleValue();
        }
    });
}

From source file:de.christianseipl.utilities.maputils.MapMath.java

/**
 * Es wird folgende Operation durchgefhrt:
 * <code>d - Math.floor(d)</code>
 * //from   w w w  .j ava  2s .c o m
 * Der Nachkommateil hat somit einen Wertebereich von [0;+1]. Ist d
 * negativ, so wird die Differenz zur nchsten kleineren ganzen Zahl
 * zurckgegeben.
 * 
 * @param <K> ein beliebiger Objekttyp
 *            
 * @param _map
 *            Die Ursprungsmap
 * @return Eine neue Map mit den Nachkommaanteilen
 */
public static <K> Map<K, Double> frac(Map<? extends K, ? extends Number> _map) {
    return operateOnMap(_map, new NumberTransformer<K, Double>() {

        @Override
        public Double transform(K _key, Number _number) {
            return _number.doubleValue() - Math.floor(_number.doubleValue());
        }

    });
}