Example usage for java.lang Number toString

Introduction

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

Prototype

public String toString() 

Source Link

Document

Returns a string representation of the object.

Usage

From source file:org.eclipse.smarthome.binding.homematic.internal.type.MetadataUtils.java

/**
 * Helper method for creating a BigDecimal.
 *///from w  ww.  j a v  a 2s. co  m
public static BigDecimal createBigDecimal(Number number) {
    if (number == null) {
        return null;
    }
    try {
        return new BigDecimal(number.toString());
    } catch (Exception ex) {
        logger.warn("Can't create BigDecimal for number: {}", number.toString());
        return null;
    }
}

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From source file:org.red5.server.service.ConversionUtils.java

/**
 * Convert number to primitive wrapper like Boolean or Float
 * @param num               Number to conver
 * @param wrapper           Primitive wrapper type
 * @return                  Converted object
 *//*from   ww  w . ja v a 2 s.com*/
public static Object convertNumberToWrapper(Number num, Class<?> wrapper) {
    //XXX Paul: Using valueOf will reduce object creation
    if (wrapper.equals(String.class)) {
        return num.toString();
    } else if (wrapper.equals(Boolean.class)) {
        return Boolean.valueOf(num.intValue() == 1);
    } else if (wrapper.equals(Double.class)) {
        return Double.valueOf(num.doubleValue());
    } else if (wrapper.equals(Long.class)) {
        return Long.valueOf(num.longValue());
    } else if (wrapper.equals(Float.class)) {
        return Float.valueOf(num.floatValue());
    } else if (wrapper.equals(Integer.class)) {
        return Integer.valueOf(num.intValue());
    } else if (wrapper.equals(Short.class)) {
        return Short.valueOf(num.shortValue());
    } else if (wrapper.equals(Byte.class)) {
        return Byte.valueOf(num.byteValue());
    }
    throw new ConversionException("Unable to convert number to: " + wrapper);
}

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From source file:edu.harvard.iq.dvn.ingest.statdataio.impl.plugins.util.StatHelper.java

/**
 * Returns a frequency table constructed from a byte array
 *
 * @param x     a byte array/*from w w w  . j av a 2 s . c om*/
 * @return      a Map whose keys are the set of responses in the byte array,
 *               and whose values are the corresponding frequencies
 */
public static Map<String, Integer> getFrequencyTable(Number[] x) {
    Map<String, Integer> tbl = new TreeMap<String, Integer>();
    for (Number entry : x) {
        if (entry == null || entry.toString().equals("NaN")) {
            // TODO: - ?
            // Add cases for +-Inf? (or are they valid values?) 
            // --L.A.
            // (and how come we are not counting them anyway??)
            continue;
        }

        String sentry = String.valueOf(entry);
        Integer freq = tbl.get(sentry);
        tbl.put(sentry, (freq == null ? 1 : freq + 1));
    }
    return tbl;
}

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From source file:com.feilong.core.lang.NumberUtil.java

/**
 * ?? ??? 0.0,0.5,1.0,1.5,2.0,2.5....//from www .j a  va 2 s .  c o m
 * 
 * <p>
 *  
 * </p>
 *
 * @param value
 *            
 * @return  <code>value</code> null, {@link NullPointerException}
 */
public static String toPointFive(Number value) {
    Validate.notNull(value, "value can't be null/empty!");

    long avgRankLong = Math.round(Double.parseDouble(value.toString()) * 2);
    BigDecimal avgBigDecimal = BigDecimal.valueOf((double) (avgRankLong) / 2);
    return setScale(avgBigDecimal, 1).toString();
}

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From source file:org.projectforge.common.NumberHelper.java

/**
 *///from w ww. ja  v a2  s.  c  om
public static BigDecimal parseCurrency(String value, final Locale locale) {
    if (value == null) {
        return null;
    }
    value = value.trim();
    if (value.length() == 0) {
        return null;
    }
    final NumberFormat format = getCurrencyFormat(locale);
    BigDecimal result = null;
    try {
        final Number number = format.parse(value);
        if (number != null) {
            result = new BigDecimal(number.toString());
            result = result.setScale(2, BigDecimal.ROUND_HALF_UP);
        }
    } catch (final ParseException ex) {
        log.debug(ex.getMessage(), ex);
    }
    return result;
}

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From source file:org.red5.io.utils.ConversionUtils.java

/**
 * Convert number to primitive wrapper like Boolean or Float
 * /*ww w  . ja  va  2  s .  c  o  m*/
 * @param num
 *            Number to conver
 * @param wrapper
 *            Primitive wrapper type
 * @return Converted object
 */
public static Object convertNumberToWrapper(Number num, Class<?> wrapper) {
    //XXX Paul: Using valueOf will reduce object creation
    if (wrapper.equals(String.class)) {
        return num.toString();
    } else if (wrapper.equals(Boolean.class)) {
        return Boolean.valueOf(num.intValue() == 1);
    } else if (wrapper.equals(Double.class)) {
        return Double.valueOf(num.doubleValue());
    } else if (wrapper.equals(Long.class)) {
        return Long.valueOf(num.longValue());
    } else if (wrapper.equals(Float.class)) {
        return Float.valueOf(num.floatValue());
    } else if (wrapper.equals(Integer.class)) {
        return Integer.valueOf(num.intValue());
    } else if (wrapper.equals(Short.class)) {
        return Short.valueOf(num.shortValue());
    } else if (wrapper.equals(Byte.class)) {
        return Byte.valueOf(num.byteValue());
    }
    throw new ConversionException(String.format("Unable to convert number to: %s", wrapper));
}

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From source file:adalid.core.primitives.NumericPrimitive.java

private static int compare(Number x, Number y) {
    BigDecimal bx = new BigDecimal(x.toString());
    BigDecimal by = new BigDecimal(y.toString());
    return bx.compareTo(by);
}

---

From source file:Main.java

/**
 * Casts an object to the specified type
 *
 * @param var//  w w w.  j a  v a  2 s . c  om
 * @param type
 *
 */
static Object convert(Object var, Class type) {
    if (var instanceof Number) { //use number conversion

        Number newNum = (Number) var;

        if (type == Integer.class) {
            return new Integer(newNum.intValue());
        } else if (type == Long.class) {
            return new Long(newNum.longValue());
        } else if (type == Float.class) {
            return new Float(newNum.floatValue());
        } else if (type == Double.class) {
            return new Double(newNum.doubleValue());
        } else if (type == String.class) {
            return new String(newNum.toString());
        }
    } else { //direct cast

        if (type == Integer.class) {
            return new Integer(((Integer) var).intValue());
        } else if (type == Long.class) {
            return new Long(((Long) var).longValue());
        } else if (type == Float.class) {
            return new Float(((Float) var).floatValue());
        } else if (type == Double.class) {
            return new Double(((Double) var).doubleValue());
        } else if (type == String.class) {
            return new String(var.toString());
        }
    }

    return null;
}

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From source file:org.xenei.jdbc4sparql.iface.TypeConverter.java

private static <T> T fromNumber(final Object columnObject, final Class<T> resultingClass) throws SQLException {
    final Number n = Number.class.cast(columnObject);
    if (resultingClass == BigDecimal.class) {
        return resultingClass.cast(new BigDecimal(n.toString()));
    }//  w ww . ja  v a2s .  com
    if (resultingClass == BigInteger.class) {
        return resultingClass.cast(new BigInteger(n.toString()));
    }
    if (resultingClass == Byte.class) {
        return resultingClass.cast(new Byte(n.byteValue()));
    }
    if (resultingClass == Double.class) {
        return resultingClass.cast(new Double(n.doubleValue()));
    }
    if (resultingClass == Float.class) {
        return resultingClass.cast(new Float(n.floatValue()));
    }
    if (resultingClass == Integer.class) {
        return resultingClass.cast(new Integer(n.intValue()));
    }
    if (resultingClass == Long.class) {
        return resultingClass.cast(new Long(n.longValue()));
    }
    if (resultingClass == Short.class) {
        return resultingClass.cast(new Short(n.shortValue()));
    }
    if (resultingClass == String.class) {
        return resultingClass.cast(n.toString());
    }
    if (resultingClass == Boolean.class) {
        if (n.byteValue() == 0) {
            return resultingClass.cast(Boolean.FALSE);
        }
        if (n.byteValue() == 1) {
            return resultingClass.cast(Boolean.TRUE);
        }
    }
    if (resultingClass == byte[].class) {
        return resultingClass.cast(n.toString().getBytes());
    }
    if (resultingClass == Blob.class) {
        return resultingClass.cast(new SerialBlob(n.toString().getBytes()));
    }
    if (resultingClass == Clob.class) {
        return resultingClass.cast(new SerialClob(n.toString().toCharArray()));
    }
    return null;
}

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From source file:org.loklak.harvester.TwitterAPI.java

/**
 * search for twitter user names by a given set of user id's
 * @param id_strs/*from   ww  w .j  a v a 2  s  .co m*/
 * @param lookupLocalUsersByUserId if this is true and successful, the resulting names may contain users without user info in the user dump
 * @return
 * @throws IOException
 * @throws TwitterException 
 */
public static Map<String, Number> getScreenName(Set<Number> id_strs, final int maxFollowers,
        boolean lookupLocalUsersByUserId) throws IOException, TwitterException {
    // we have several sources to get this mapping:
    // - 1st / fastest: mapping from DAO.twitter_user_dump
    // - 2nd / fast   : mapping from DAO.searchLocalUserByUserId(user_id)
    // - 3rd / slow   : from twitter API with twitter.lookupUsers(String[] user_id)
    // first we check all fast solutions until trying the twitter api
    Map<String, Number> r = new HashMap<>();
    Set<Number> id4api = new HashSet<>();
    for (Number id_str : id_strs) {
        if (r.size() >= maxFollowers)
            break;
        JsonFactory mapcapsule = DAO.user_dump.get("id_str", id_str.toString());
        if (mapcapsule != null) {
            JSONObject map = mapcapsule.getJSON();
            String screen_name = map.has("screen_name") ? (String) map.get("screen_name") : null;
            if (screen_name != null) {
                r.put(screen_name, id_str);
                continue;
            }
        }
        if (lookupLocalUsersByUserId) {
            UserEntry ue = DAO.searchLocalUserByUserId(id_str.toString());
            if (ue != null) {
                String screen_name = ue.getScreenName();
                if (screen_name != null) {
                    r.put(screen_name, id_str);
                    continue;
                }
            }
        }
        id4api.add(id_str);
    }

    while (id4api.size() > 100 && id4api.size() + r.size() > maxFollowers)
        id4api.remove(id4api.iterator().next());

    // resolve the remaining user_ids from the twitter api
    if (r.size() < maxFollowers && id4api.size() > 0) {
        TwitterFactory tf = getAppTwitterFactory();
        if (tf == null)
            return new HashMap<>();
        Twitter twitter = tf.getInstance();
        collect: while (id4api.size() > 0) {
            // construct a query term with at most 100 id's
            int chunksize = Math.min(100, id4api.size());
            long[] u = new long[chunksize];
            Iterator<Number> ni = id4api.iterator();
            for (int i = 0; i < chunksize; i++) {
                u[i] = ni.next().longValue();
            }
            try {
                ResponseList<User> users = twitter.lookupUsers(u);
                for (User usr : users) {
                    JSONObject map = user2json(usr);
                    enrichLocation(map);
                    DAO.user_dump.putUnique(map);
                    r.put(usr.getScreenName(), usr.getId());
                    id4api.remove(usr.getId());
                }
            } catch (TwitterException e) {
                if (r.size() == 0)
                    throw e;
                break collect;
            }
        }
    }
    return r;
}

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