Java Utililty Methods Parse Number

List of utility methods to do Parse Number

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Description

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

Method

NumberparseNum(String numStr)
parse Num 
return NumberFormat.getInstance().parse(numStr);
ObjectparseNumber(CharacterIterator it)
parse Number 
StringBuffer buffer = new StringBuffer();
char c = it.current();
while (Character.isDigit(c) || c == '-' || c == '+' || c == '.' || c == 'e' || c == 'E') {
    buffer.append(c);
    c = it.next();
try {
    return new BigDecimal(buffer.toString());
...
NumberparseNumber(final String source, final String conversionPattern)
parse Number 
DecimalFormat df = DECIMAL_FORMAT.get();
df.applyPattern(conversionPattern);
return df.parse(source);
doubleparseNumber(String number)
Parses a string with the default locale and returns the corresponding number 
return parseNumber(number, Locale.getDefault());
doubleparseNumber(String number)
parse Number 
synchronized (NUMBER_PARSE) {
    return NUMBER_PARSE.parse(number.trim()).doubleValue();
NumberparseNumber(String s)
parse Number 
try {
    return NumberFormat.getInstance().parse(s);
} catch (ParseException e) {
    throw new RuntimeException("Could not parse " + s + " to number", e);
NumberparseNumber(String text, Class targetClass)
Parse the given text into a number instance of the given target class, using the corresponding default decode methods. 
String trimmed = text.trim();
if (targetClass.equals(Byte.class)) {
    return Byte.decode(trimmed);
} else if (targetClass.equals(Short.class)) {
    return Short.decode(trimmed);
} else if (targetClass.equals(Integer.class)) {
    return Integer.decode(trimmed);
} else if (targetClass.equals(Long.class)) {
...
NumberparseNumber(String text, Class targetClass, NumberFormat numberFormat)
Parse the given text into a number instance of the given target class, using the given NumberFormat. 
if (numberFormat != null) {
    DecimalFormat decimalFormat = null;
    boolean resetBigDecimal = false;
    if (numberFormat instanceof DecimalFormat) {
        decimalFormat = (DecimalFormat) numberFormat;
        if (BigDecimal.class.equals(targetClass) && !decimalFormat.isParseBigDecimal()) {
            decimalFormat.setParseBigDecimal(true);
            resetBigDecimal = true;
...
TparseNumber(String text, Class targetClass)
Parse the given text into a Number instance of the given target class, using the corresponding decode / valueOf method. 
Objects.requireNonNull(text, "Text must not be null");
Objects.requireNonNull(targetClass, "Target class must not be null");
String trimmed = text.trim();
if (Byte.class == targetClass) {
    return (T) (isHexNumber(trimmed) ? Byte.decode(trimmed) : Byte.valueOf(trimmed));
} else if (Short.class == targetClass) {
    return (T) (isHexNumber(trimmed) ? Short.decode(trimmed) : Short.valueOf(trimmed));
} else if (Integer.class == targetClass) {
...
NumberparseNumeric(String value)
parse Numeric 
try {
    return Long.parseLong(value);
} catch (NumberFormatException nfe) {
    try {
        return Double.parseDouble(value);
    } catch (NumberFormatException nfe2) {
        try {
            return NumberFormat.getInstance().parse(value);
...