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Convertinf string to double from JTextField

Alex Perez
Greenhorn

Joined: Sep 18, 2003
Posts: 1
I want to convert a string from a JTextField gotten using field.getText();
to a type double. I tried using valueOf, but then I can't use the + operator or any other math operand. I am making a calculator program in Swing.
Wayne L Johnson
Ranch Hand

Joined: Sep 03, 2003
Posts: 399
How about:
double dbl = (new Double(field.getText())).doubleValue();
You'll probably want to wrap it in a try/catch block in case the user puts in something invalid. You could also use regular expressions to do some validation and warn the user if it's bad.
 
It is sorta covered in the JavaRanch Style Guide.
 
subject: Convertinf string to double from JTextField