CheckingAccount.java

package com.luxoft.bankapp.model;

import com.luxoft.bankapp.model.exception.OverDraftLimitExceededException;

// this is an incomplete class. use it as example.
public class CheckingAccount extends AbstractAccount {
    private float overdraft;

    public CheckingAccount(float balance) {
        super(balance);
    }

    public CheckingAccount(float balance, float overdraft) {
        this(balance);
        if(overdraft < 0) {
            throw new IllegalArgumentException("Overdraft must be greater than or equal to 0");
        }
        this.overdraft = overdraft;
    }

    public float getOverdraft() {
        return overdraft;
    }

    public void withdraw(float amount) {
        if(balance + overdraft < amount) {
            throw new OverDraftLimitExceededException();
        }
        balance -= amount;
    }
}