Convert a String to Double - Java

Question

What is the easiest and correct way to convert a String number with commas (for example: 835,111.2) to a Double instance.

Thanks.

Answer 1

A link can say more than thousand words

// Format for CANADA locale
Locale locale = Locale.CANADA;
String string = NumberFormat.getNumberInstance(locale).format(-1234.56);  // -1,234.56

// Format for GERMAN locale
locale = Locale.GERMAN;
string = NumberFormat.getNumberInstance(locale).format(-1234.56);   // -1.234,56

// Format for the default locale
string = NumberFormat.getNumberInstance().format(-1234.56);


// Parse a GERMAN number
try {
    Number number = NumberFormat.getNumberInstance(locale.GERMAN).parse("-1.234,56");
    if (number instanceof Long) {
        // Long value
    } else {
        // Double value
    }
} catch (ParseException e) {
}