public class ProjectEleven {

public static void main(String[] args){

Scanner keyScan = new Scanner(System.in);

System.out.println("This program will read a users 4-bit binary number"
+ "\nfrom the keyboard as a String and then convert it"
+ "\ninto decimal.");

System.out.println("Enter your 4-bit binary number");
String binary = keyScan.nextLine();

String bitOne = binary.substring(0, 1);
String bitTwo = binary.substring(1, 2);
String bitThree = binary.substring(2, 3);
String bitFour = binary.substring(3, 4);

int dBitOne = Integer.parseInt(bitOne);
int dBitTwo = Integer.parseInt(bitTwo);
int dBitThree = Integer.parseInt(bitThree);
int dBitFour = Integer.parseInt(bitFour);

System.out.println((dBitOne 8) + (dBitTwo 4) + (dBitThree 2) + (dBitFour 1));
}
}