How to read an int or double?

[Dominik Pawlocki]

Hi all ;-)
Situation:
I'm writing an math application,and I need some fields in my GUI to enter the calculation params(lenght for example).
The TextField with getText method (you have explained me grately) returns a String;I need the method read a double or int from the field to use in aplication's further calculations.
How shall I do this?
And what about sending the result back to my window? (setText or drawText use Strings too)
Thank's very much.

[Matt Senecal]

To make a double from a String:

double dbl = new Double(field.getText()).doubleValue();

To make an int:

int x = Integer.decode(field.getText()).intValue();

[Dave Vick]

Dominik
To get an int or double from a string you'd use one of the wrapper classes. Check out the Integer and Double classes in the java.lang.Number package. Both of these classes have methods that will take a String value and return a primitive. For example to get a double from a String you would do somehting like this:

...
String strDbl = "2.456";
double dbl;
dbl = Double.parseDouble(strDbl);
...

After that code the variable dbl will have the primitive double value of 2.456
Hope that helps

------------------
Dave
Sun Certified Programmer for the Java� 2 Platform