thisAccount

testCount

limit

count

Listing 2:

2

3 import java.util.Scanner;

4 import java.util.Random;

5

6 public class AccountTester

7 {

8 Random randomNumbers = new Random();

9 Scanner userInput = new Scanner(System.in);

10

11 public void testAccountClass()

12 {

13 System.out.println("\n\n*** Testing the Account Class ***");

14

15 System.out.printf("\nCurrent Interest Rate: %.2f%%", Account.CURRENT_RATE *

16 100.0);

17

18 System.out.println("\n\nCreating Account Objects");

19 Account accountOne = new Account(5000.0);

20 Account accountTwo = new Account(accountOne);

21 accountOne.displayValues("\nInitial Values for Account One:");

22 accountTwo.displayValues("\nInitial Values for Account Two:");

23

24 System.out.println("\n\nExercising Account Transactions");

25 accountOne.credit(0.0);

26 accountOne.debit(-6);

27 accountTwo.credit(-1.50);

28 accountTwo.debit(100.0);

29 accountTwo.debit(5000);

30 exerciseTransactions(accountOne, 100, 500.0);

31 exerciseTransactions(accountTwo, 250.0);

32 accountOne.displayValues("\n\nUpdated Values for Account One:");

33 accountTwo.displayValues("\nUpdated Values for Account Two:");

34

35 System.out.println("\n\nExercising Future Value Calculators");

36 System.out.printf(" Calculation 1: $%.2f\n", accountOne.futureValue(6.5,

37 0.05));

38 System.out.printf(" Calculation 2: $%.2f\n", accountOne.futureValue(15,

39 0.05));

40 System.out.printf(" Calculation 3: $%.2f\n", accountTwo.futureValue(6.5));

41 System.out.printf(" Calculation 4: $%.2f\n", accountTwo.futureValue(15));

42 System.out.println("\n\n*** Testing Complete ***\n");

43 }

44

45 private void exerciseTransactions(Account thisAccount, int testCount,

46 double limit)

47 {

48 int count = 0;

49 while( count < testCount )

50 {

51 if( (count % 3) != 0 )

52 thisAccount.credit(getDataValue(limit));

53 else

54 thisAccount.debit(getDataValue(limit));

55 count++;CSC-240 Java Programming A????1 Exam One Listings Page 4 of 6

56 }

57 }

58

59 private void exerciseTransactions(Account thisAccount, double limit)

60 {

61 char answer;

62 displayMenu();

63 do

64 {

65 answer = getUserCommand();

66 switch( answer )

67 {

68 case 'D':

69 thisAccount.debit(getUserValue(limit));

70 break;

71 case 'C':

72 thisAccount.credit(getUserValue(limit));

73 break;

74 case 'V':

75 thisAccount.displayValues();

76 break;

77 case 'M':

78 displayMenu();

79 break;

80 }

81 }

82 while( answer != 'Q' );

83 }

84

85 private double getDataValue(double maxValue)

86 {

87 return 1.0 + randomNumbers.nextDouble() * maxValue;

88 }

89

90 private double getUserValue(double limit)

91 {

92 double thisValue;

93 do

94 {

95 System.out.printf("Please enter a value (0.0 - %.2f): ", limit);

96 thisValue = userInput.nextDouble();

97 if( !(thisValue >= 0.0 && thisValue <= limit) )

98 System.out.printf("? Invalid input: %.2f\n", thisValue);

99 }

100 while( thisValue < 0.0 || thisValue > limit );

101 return thisValue;

102 }

103

104 private void displayMenu()

105 {

106 System.out.println("\n\nPlease enter one of the following:");

107 System.out.println(" D - to test the debit method");

108 System.out.println(" C - to test the credit method");

109 System.out.println(" V - to display the values of the Account");

110 System.out.println(" M - to re-display this menu");

111 System.out.println(" Q - to exit this test\n");

112 }CSC-240 Java Programming A????1 Exam One Listings Page 5 of 6

113

114 private char getUserCommand()

115 {

116 char thisChar;

117 boolean goodChar;

118 do

119 {

120 System.out.print("Enter a command letter: ");

121 thisChar = userInput.next().toUpperCase().charAt(0);

122 goodChar = (thisChar == 'D' || thisChar == 'C' || thisChar == 'M' ||

123 thisChar == 'Q' || thisChar == 'V');

124 if( !goodChar )

125 System.out.println("That is not a valid command letter");

126 }

127 while( goodChar == false );

128 return thisChar;

129 }

130    }