Good friends, I need to pass a string string to float in JAVA . The problem is that in the end, each string ends with units (volt,%, cm, m .. etc)
example: Convert the String "0.22V" to float : 0.22
Thank you very much!
PS: All the Strings I want to transform are on the left and their corresponding units on the right. It is not feasible to split each one, since it would be inefficient since the +30 data is in a collection in which I must iterate.
I would greatly appreciate your help, thank you.
You can use the following method which extracts the decimal number from the string and stores it in a new string, finally converting it to float when you have already found all the numbers.
public float stringToFloat(String string){
String newString="";
for(int i=0;i<string.length();i++){
///Este if extrae digitos del 0 al 9 y el punto.
if(string.charAt(i)>=48 &&
string.charAt(i)<=57 ||
string.charAt(i)=='.'){
newString+=string.charAt(i);
}
///se termina el ciclo cuando encuentra el primer carácter no válido, ejemplos la V de volts.
else{
break;
}
}
return Float.parseFloat(newString); ///Finalmente convierte la nueva cadena a float.
}