What types of data are used to account for the balance on a bank account?

To account for the balance on a bank account in Java, the following data types are usually used:

• BigDecimal — the preferred type for storing monetary values, as it provides precision in floating-point operations and prevents rounding errors.
• long or int — sometimes used to store amounts in the smallest units of currency (for example, kopecks or cents) to avoid issues with floating-point.

Example of using BigDecimal:

import java.math.BigDecimal;

public class BankAccount {
    private BigDecimal balance;

    public BankAccount() {
        this.balance = BigDecimal.ZERO;
    }

    public void deposit(BigDecimal amount) {
        balance = balance.add(amount);
    }

    public void withdraw(BigDecimal amount) {
        balance = balance.subtract(amount);
    }

    public BigDecimal getBalance() {
        return balance;
    }
}