Answers for "string into double java"

string to double java exception

try {
  a = Double.parseDouble(b);
} catch (NumberFormatException e) {
  //the parseDouble failed and you need to handle it here
}

java string to double

Double d = Double.valueOf(String str);

transformer un string en double java

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