public class CountDown
1:
2: import java.util.*
3: ;
4: public class CountDown
5: {
6: private int count;
7:
8: public static void main(String[] args)
9: {
10: CountDown countDowner = new CountDown( );
11: countDowner.getCount( );
12: countDowner.showCountDown( );
13: }
14:
15: public void getCount( )
16: {
17: System.out.println("Enter a positive number:");
18: Scanner keyboard = new Scanner(System.in);
19: count = keyboard.nextInt( );
20: if (count <= 0)
21: {
22: System.out.println("Input must be positive.");
23: System.out.println("Try again.");
24: getCount( );//start over
25: }
26: }
27:
28: public void showCountDown( )
29: {
30: int left;
31: System.out.println("Counting down:");
32: for (left = count; left >= 0; left--)
33: System.out.print(left + ", ");
34: System.out.println("Blast Off!");
35: }
36: }
37:
38:
39:
40:
41:
42: