Anatomy of a Class

AP Computer Science A· difficulty 1/5

public class Account {
    private double balance;
    public double getBalance() { return balance; }
    public void deposit(double amt) {
        if (amt > 0) balance += amt;
    }
}
// ...

Which best describes why balance is private?

A
$To enforce encapsulation; outside code must use methods that validate access and modification$
check_circle
B
$Because private variables run faster$
C
$So they cannot be initialized$
D
$So static methods cannot use them$

Explanation

Encapsulation hides internal state and exposes a controlled interface, allowing validation logic in the methods.

Want 10 more like this — adaptive to your weak spots?

Practice 10 like thisarrow_forward Predict my AP score

Related questions