How can I convert string to double? [duplicate]

问题

This question already has answers here:

Converting String to Double in Android (8 answers)

Closed 6 days ago.

I am developing an android app. I need to convert string to double. How can I do it?

回答1:

You just need this :

double d=Double.parseDouble(myString);

If your String value cannot be parsed to double it will throw NumberFormatException. So better you put the parseDouble statement inside try catch block.

回答2:

here is the example

try{
   double dbl = Double.parseDouble("99.882039");
catch(NumberFormatException ex){
  // handle exception
}

回答3:

double d = Double.parseDouble(theString);

回答4:

That's not a thing of android but if you're sure you string can be expressed as a double you can do it like this with simple Java:

Double.valueOf("1.2");

来源：https://stackoverflow.com/questions/7239542/how-can-i-convert-string-to-double