public static void main(String[] args) throws IOException {
int choice;
PrintWriter pw = new PrintWriter(new FileWriter("csis.txt"));
Decimal dec = new Decimal(pw);
Binary bin = new Binary(pw);
Hexadecimal hex = new Hexadecimal(pw);
Menu menu = new Menu(pw);
do {
menu.display();
choice = menu.getSelection();
switch (choice) {
case 1:
dec.decToBin();
break;
case 2:
dec.decToHex();
break;
case 3:
bin.binToDec();
break;
case 4:
bin.binToHex();
break;
case 5:
hex.hexToDec();
break;
case 6:
hex.hexToBin();
break;
}
} while (choice != 7);
pw.close();
}