String to Double conversion in java

Question

How can I convert a String such as "123.456" to a double in Java?

Answer 1

You can do it in the following way :

String s = "10.1";
Double d = Double.parseDouble(s);

The parseDouble method will achieve the desired effect, and so will the Double.valueOf() method.

Answer 2

If you have problems in parsing string to decimal values, you need to replace "," in the number to "."

String number = "123,321";
double value = Double.parseDouble( number.replace(",",".") );

Answer 3

Double temp = Double.valueOf(str);
number = temp.doubleValue();