Java Coding Problems

7. Converting a string into an int, long, float, or double

Let's consider the following strings (negatives can be used as well):

private static final String TO_INT = "453"; private static final String TO_LONG = "45234223233"; private static final String TO_FLOAT = "45.823F";private static final String TO_DOUBLE = "13.83423D";

A proper solution for converting String into int, long, float, or double consists of using the following Java methods of the Integer, Long, Float, and Double classes—parseInt(), parseLong(), parseFloat(), and parseDouble():

int toInt = Integer.parseInt(TO_INT);long toLong = Long.parseLong(TO_LONG);float toFloat = Float.parseFloat(TO_FLOAT);double toDouble = Double.parseDouble(TO_DOUBLE);

Converting String into an Integer ...