Java tutorial
public class Main { public static void main(String[] args) { String decimal = "10"; // Decimal String hexa = "0XFF"; // Hexa String octal = "077"; // Octal Integer number = Integer.decode(decimal); System.out.println("String [" + decimal + "] = " + number); number = Integer.decode(hexa); System.out.println("String [" + hexa + "] = " + number); number = Integer.decode(octal); System.out.println("String [" + octal + "] = " + number); } }