Credit

public class Credit {
    public enum CreditType {
        STUDENT,
        HOUSE,
        AUTO
    }

    private CreditType creditType;
    private double interest;

    public Credit(CreditType creditType) {
        this.creditType = creditType;
        setInterest(creditType);
    }

    public CreditType getCreditType() {
        return creditType;
    }

    public void setCreditType(CreditType creditType) {
        this.creditType = creditType;
        setInterest(creditType);
    }

    public double getInterest() {
        return interest;
    }

    private void setInterest(CreditType creditType) {
        switch (creditType) {
            case STUDENT:
                this.interest = 10.0;
                break;
            case HOUSE:
                this.interest = 7.0;
                break;
            case AUTO:
                this.interest = 5.0;
                break;
        }
    }

    @Override
    public String toString() {
        return "Credit type: " + getCreditType() + " Interest " + getInterest() + "%";
    }
}