import java.util.Scanner;

public class NumberParsing {
    public static void main(String[] args) {
        // With Double.parseDouble, we don't need to specify precision
        // as Java's double type is always 64-bit
        double f = Double.parseDouble("1.234");
        System.out.println(f);

        // For parsing integers, we can use Integer.parseInt or Long.parseLong
        // depending on the size of the number
        long i = Long.parseLong("123");
        System.out.println(i);

        // Java can parse hexadecimal numbers using the same method
        long d = Long.parseLong("1c8", 16);
        System.out.println(d);

        // For parsing unsigned integers, we can use Long.parseUnsignedLong
        long u = Long.parseUnsignedLong("789");
        System.out.println(u);

        // Java doesn't have a direct equivalent to Atoi, but we can use Integer.parseInt
        int k = Integer.parseInt("135");
        System.out.println(k);

        // Parse methods throw NumberFormatException on bad input
        try {
            int badNumber = Integer.parseInt("wat");
        } catch (NumberFormatException e) {
            System.out.println(e.getMessage());
        }
    }
}