public class GuessTheNumbers
1: //GuessTheNumbers.java
3: import java.util.HashSet;
4: import java.util.Scanner;
6: public class GuessTheNumbers
7: {
8: public static void main(String[] args)
9: {
10: Scanner scnr = new Scanner(System.in);
11: HashSet<Integer> numbersToGuess = new HashSet<Integer>();
12: int userGuess;
14: numbersToGuess.add(3);
15: numbersToGuess.add(5);
16: numbersToGuess.add(1);
18: System.out.print("Enter a number between 1 to 10 (0 to exit): ");
19: userGuess = scnr.nextInt();
21: while (userGuess != 0)
22: {
23: // Check user's guess
24: //if (numbersToGuess.contains(userGuess))
25: //{
26: //numbersToGuess.remove(userGuess);
27: //Above 3 lines revised as the following line
28: if (numbersToGuess.remove(userGuess))
29: {
30: System.out.println
31: (
32: "Good guess! "
33: + numbersToGuess.size()
34: + " number(s) remaining."
35: );
36: }
37: else
38: {
39: System.out.println
40: (
41: "Incorrect guess. "
42: + numbersToGuess.size()
43: + " number(s) remaining."
44: );
45: }
47: System.out.println();
49: // Exit if no numbers are left, otherwise ask again
50: if (numbersToGuess.size() == 0)
51: {
52: break;
53: }
54: else
55: {
56: System.out.print
57: (
58: "Enter a number between 1 to 10 (0 to exit): "
59: );
60: userGuess = scnr.nextInt();
61: }
62: }
64: // Print victory/failure message
65: if (userGuess != 0)
66: {
67: System.out.println("You won!");
68: }
69: else
70: {
71: System.out.println("Quitters always lose!");
72: }
73: }
74: }