Creating Superclasses and Subclasses

public class Account {
    protected double balance;
    public Account(double b) { balance = b; }
}
public class Savings extends Account {
    private double rate;
    public Savings(double b, double r) {
        super(b);
        rate = r;
    }
    public double interest() { return balance * rate; }
}
// Usage:
Savings s = new Savings(1000.0, 0.05);
System.out.print(s.interest());

• A

  Compile error

• B

  50.0

  check_circle
• C

  0.05

• D

  1000.0