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Android parsing negative row numbers

How to analyze strings of negative numbers?

lines can be of the form:

-123.23  
(123.23)  
123.23-

is there a class that converts any of the above lines to a number?

if not, what is the best way to do this?

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3 answers

Based on WarrenFaiths answer you can add the following:

Double newNumber = 0;
if(number.charAt(i).isDigit()){
     //parse numeber here using WarrenFaiths method and place the int or float or double 
     newNumber = Double.valueOf(number);
}else{
    Boolean negative = false;

    if(number.startsWith("-") || number.endsWith("-")){
         number = number.replace("-", "");
         negative = true;
    }
    if(number.startsWith("(") || number.endsWith(")"){
        number = number.replace("(", "");
        number = number.replace(")", "");
    }

    //parse numeber here using WarrenFaiths method and place the float or double 
    newNumber = Double.valueOf(number);

    if(negative){
      newNumber = newNumber * -1;
    }
}

I'm sorry if the replacement methods are wrong, please correct me.

+4
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"-123.23"can be analyzed using Float.valueOf("-123.23");orDouble.valueOf("-123.23");

"(123.23)" "123.23-" / . , , . a - , ...

+4

here's a hack, pls comment about improvements, etc., time to learn even more :)

private Double RegNumber(String sIn) {
        Double result = 0E0;
        Pattern p = Pattern.compile("^\\-?([0-9]{0,3}(\\,?[0-9]{3})*(\\.?[0-9]*))");   // -1,123.11
        Matcher m = p.matcher(sIn);
        if (m.matches()) {
            result = Double.valueOf(sIn);
        } else {
            Pattern p1 = Pattern.compile("^\\(?([0-9]{0,3}(\\,?[0-9]{3})*(\\.?[0-9]*))\\)?$");  // (1,123.22)
            Matcher m1 = p1.matcher(sIn);
            if (m1.matches()) {
                String x[] = sIn.split("(\\({1})|(\\){1})"); // extract number
                result = Double.valueOf("-" + x[1]);
            } else {
                Pattern p2 = Pattern.compile("([0-9]{0,3}(\\,?[0-9]{3})*(\\.?[0-9]*))\\-$");  // 1,123.22-
                Matcher m2 = p2.matcher(sIn);
                if (m2.matches()) {
                    String x[] = sIn.split("(\\-{1})"); // extract number
                    result = Double.valueOf("-" + x[0]);
                } else {
                    result = 99999999E99;  // error, big value
                }
            }
        }
        return result;
    }
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