Arrays and Array Lists - Java Concepts - page 417

32 for (BankAccount a : accounts)
33 {
34 total = total + a.getBalance();
35 }
36 return total;
37 }
38
39 /**
40 Counts the number of bank accounts whose
balance is at
41 least a given value.
42 @param atLeast the balance required to
count an account
43 @return the number of accounts having at
least the given balance
44 */
45 public int count( double atLeast)
46 {
47 int matches = 0 ;
48 for (BankAccount a : accounts)
49 {
50 if (a.getBalance() >= atLeast)
matches++; // Found a match
51 }
52 return matches;
53 }
54
55 /**
56 Finds a bank account with a given number.
57 @param accountNumber the number to find
58 @return the account with the given
number, or null if there
59 is no such account
60 */
61 public BankAccount find( int accountNumber)
62 {
63 for (BankAccount a : accounts)
64 {
65 if (a.getAccountNumber() ==
accountNumber) // Found a match
66 return a;
67 }
68 return null ; // No match in the entire array list
69 }