public class DoDivision
1:
2: import java.util.Scanner;
3:
4: public class DoDivision
5: {
6: private int numerator;
7: private int denominator;
8: private double quotient;
9:
10: public static void main(String[] args)
11: {
12: DoDivision doIt = new DoDivision( );
13:
14: try
15: {
16: doIt.doNormalCase( );
17: }
18: catch(DivideByZeroException e)
19: {
20: System.out.println(e.getMessage( ));
21: doIt.giveSecondChance( );
22: }
23:
24: System.out.println("End of Program.");
25: }
26:
27: public void doNormalCase( ) throws DivideByZeroException
28: {
29: System.out.println("Enter numerator:");
30: Scanner keyboard = new Scanner(System.in);
31: numerator = keyboard.nextInt( );
32:
33: System.out.println("Enter denominator:");
34: denominator = keyboard.nextInt( );
35: if (denominator == 0)
36: throw new DivideByZeroException( );
37: quotient = numerator / (double)denominator;
38: System.out.println(numerator + "/" + denominator +
39: " = " + quotient);
40: }
41:
42: public void giveSecondChance( )
43: {
44: System.out.println("Try Again:");
45: System.out.println("Enter numerator:");
46: Scanner keyboard = new Scanner(System.in);
47:
48: numerator = keyboard.nextInt( );
49: System.out.println("Enter denominator:");
50: System.out.println("Be sure the denominator is not zero.");
51: denominator = keyboard.nextInt( );
52:
53: if (denominator == 0)
54: {
55: System.out.println("I cannot do division by zero.");
56: System.out.println("Since I cannot do what you want,");
57: System.out.println("the program will now end.");
58: System.exit(0);
59: }
60:
61: quotient = ((double)numerator) / denominator;
62: System.out.println(numerator + "/" + denominator +
63: " = " + quotient);
64: }
65: }
66:
67:
68:
69:
70:
71:
72: