Java Utililty Methods Number Convert

List of utility methods to do Number Convert

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Description

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

Method

BigDecimalconvert(long value, long factor, int comma)
Converter from long to bigDecimal 
BigDecimal retVal = new BigDecimal(value);
retVal = retVal.divide(new BigDecimal(factor), comma, BigDecimal.ROUND_HALF_UP);
return retVal;
LongconvertBytesToKBytes(String value)
convert Bytes to KiloBytes 
if (null == value) {
    return 0L;
BigDecimal val = new BigDecimal(value);
BigDecimal kbconverter = new BigDecimal(KILOBYTECONVERTERVALUE);
BigDecimal result = val.divide(kbconverter, RoundingMode.CEILING);
if (result.longValue() == 0) {
    return 1L;
...
StringconvertBytesToUnit(long bytes)
Converts bytes to a representable unit, such as MB,GB,TB etc. 
String unit = " kB";
BigDecimal divisor = new BigDecimal(1000);
BigDecimal value = new BigDecimal(bytes);
value = value.divide(divisor);
if (value.compareTo(divisor) == 1) {
    value = value.divide(divisor);
    unit = " MB";
if (value.compareTo(divisor) == 1) {
    value = value.divide(divisor);
    unit = " GB";
if (value.compareTo(divisor) == 1) {
    value = value.divide(divisor);
    unit = " TB";
if (value.compareTo(divisor) == 1) {
    value = value.divide(divisor);
    unit = " PB";
return value.setScale(2, RoundingMode.HALF_UP) + unit;
intconvertCount(Object obj)
This method safely converts the result of a SELECT COUNT(*) to an int. 
if (obj instanceof Integer) {
    return (Integer) obj;
} else if (obj instanceof Long) {
    return ((Long) obj).intValue();
} else if (obj instanceof BigDecimal) {
    return ((BigDecimal) obj).intValue();
throw new RuntimeException("Cannot convert type " + obj.getClass() + " to an int");
...
longconvertDurationToMillis(String time)
Calls the correct functions to convert the time period to milliseconds 
if (time == null || (time != null && "".equals(time))) {
    return 0;
BigDecimal milliseconds = null;
String line = time;
String pattern = "(\\d+.\\d+|\\d+)(\\w+)";
Pattern r = Pattern.compile(pattern);
Matcher m = r.matcher(line);
...
StringconvertedFileSize(Long fileSize)
converted File Size 
String convertedSize = null;
if (fileSize >= 1024 * 1024) {
    convertedSize = BigDecimal.valueOf(fileSize).divide(BigDecimal.valueOf(1024 * 1024), 1,
            RoundingMode.HALF_UP) + "M";
} else if (fileSize >= 1024) {
    convertedSize = BigDecimal.valueOf(fileSize).divide(BigDecimal.valueOf(1024), 1, RoundingMode.HALF_UP)
            + "K";
} else {
...
IntegerconvertFromMsToMinutes(Integer duration)
convert From Ms To Minutes 
return (duration != null) ? duration / MILISECONDS_IN_SECOND / SECONDS_IN_MINUTE
        : BigDecimal.ZERO.intValue();
doubleconvertGeoCoordinateToDouble(int point)
Takes a Lat or Long as an int and converts to a double. 
double convertedPoint = ((double) point) / LAT_LONG_CONVERSION_FACTOR;
BigDecimal bd = new BigDecimal(convertedPoint);
bd.setScale(LAT_LONG_DECIMAL_PRECISION, BigDecimal.ROUND_HALF_UP);
return bd.doubleValue();
BigDecimalconvertImperialToMetric(String areaImp)
Converts an area in imperial format to its metric equivalent. 
BigDecimal result = null;
if (areaImp != null && !areaImp.trim().isEmpty()) {
    String regex = "(.*?)a| (.*?)r|(.*?)r|a(.*?)r| (.*?)p|(.*?)p|r(.*?)p|a(.*?)p";
    Pattern pattern = Pattern.compile(regex);
    if (pattern.matcher(areaImp.toLowerCase()).matches()) {
        Double acre = new Double(0);
        Double rood = new Double(0);
        Double perch = new Double(0);
...
BigDecimalconvertJcoDecimalDefaultValue(String jcoDefaultDecimalValue)
Converts the JCo string representation for the default value of a decimal type list parameter field into a BigDecimal. 
if (jcoDefaultDecimalValue == null) {
    return null;
try {
    return new BigDecimal(jcoDefaultDecimalValue);
} catch (NumberFormatException e) {
    return null;