CODEWITHSUNDEEP
javastringstring-conversionparsefloat
kazor02x
kazor02x

Reputation: 43

Convert a String to float in java

I'm trying to parse a String to a float with the float.parsefloat() method but it gives me an error concerning the format.

int v_CurrentPosX = Math.round(Float.parseFloat(v_posString)); //where v_posString is the float that I want to convert in this case 5,828

And the error:

Exception in thread "main" java.lang.NumberFormatException: For input string: "5,828" at sun.misc.FloatingDecimal.readJavaFormatString(FloatingDecimal.java:2043) at sun.misc.FloatingDecimal.parseFloat(FloatingDecimal.java:122)

Upvotes: 2

Views: 7738

Answers (4)

ΦXocę 웃 Пepeúpa ツ
ΦXocę 웃 Пepeúpa ツ

Reputation: 48287

Your problem is that colon (,) is not a default locale in the JVM...

you can use a NumberFormat for that, with the right locale 

String x = "5,828";
NumberFormat myNumForm = NumberFormat.getInstance(Locale.FRENCH);
double myParsedFrenchNumber = (double) myNumForm.parse(x);
System.out.println("D: " + myParsedFrenchNumber);

Upvotes: 4

Anoop
Anoop

Reputation: 1305

Float.parseFloat() doesn't consider locale and always expects '.' to be your decimal point separator. You can use DecimalFormat instead.

    DecimalFormatSymbols symbols = new DecimalFormatSymbols();
    symbols.setDecimalSeparator(',');

    String str = "5,200";

    DecimalFormat format = new DecimalFormat("0.#");
    format.setDecimalFormatSymbols(symbols);
    float f = format.parse(str).floatValue();

Upvotes: 0

Abdullah Mohammad Motiullah
Abdullah Mohammad Motiullah

Reputation: 12572

Try this

NumberFormat.getNumberInstance(Locale.FRANCE).parse("5,828");

Upvotes: 0

uzr
uzr

Reputation: 1220

Try replacing the comma with a dot before parsing like so:

v_posString =  v_posString.replace(",",".");
int v_CurrentPosX = Math.round(Float.parseFloat(v_posString));

The problem is that your locale is set to use . for floats and not ,.

Upvotes: 0

Related Questions