class BankAccount {
        /*
         * Fields, atributes
         */
        long    accountNumber;
        double  balance;
        String  customerName;

        /*
         * Constructor
         */
        BankAccount(long number, double openingBal, String customer) {
                // Code to create a new BankAccount object
                accountNumber = number;
                balance = openingBal;
                customerName = customer;
        }

        /*
         * Methods
         */
        void deposit(double amount) {
                // code to deposit amount
                balance += amount;
        }

        void withdraw(double amount) {
                // code to withdraw amount
                balance -= amount;
        }

        // any additional methods, constructors and/or fields
}

Použití objektů třídy BankAccount. Nejdříve vytvoření objektů.

BankAccount  account1 = new BankAccount(123456, 1E6, "J DOe");
BankAccount  account2 = new BankAccount(123457, 112E6, "D Beckham");

double difference = account2.balance - account1.balance;

System.out.println(account2.customerName + " has " + difference + " more than " + account1.customerName);

account2.withdraw(difference);
account1.deposit(difference);

account1 = account2;