Question

1. Design and implement classes.

Design a class named Account and its two subclasses named Checking and Saving. Make Flexible and NotFlexbile subclasses of Saving. An account has a name, address, phone number, and balance. A checking account has a overdraft limit. A saving account has an interest rate. A flexible saving account has the accumulated interest rate. A none flexible account has the expected accumulated interest rate at the maturity of the account. Override the toString method in each class to display the complete type of the account and owner’s name.

Draw the UML diagram for the classes. Write the code for the Checking class only.

Answer 1

<<Java Class> Account (def ault package) o name: String o address: String o phoneNumber: String o balance: float Account) o getName() String o setName(String)void o getA ddress0:String o setAddress(String):void o getPhoneNumber) String o setPhoneNumber(String) void o getBalance) float o setBalance(float)void o toString):String <<Java Cass> Saving (def ault package) <<Java Cass> C Checking (def ault package) o interestRate: float อั้ Saving) o getinterestRate):float o setinterestRate(float)void o toString0:String o OverdraftLimit: float Checking o getOverdraftLimitOfloat o setOverdraftLimit(float):void o toString):String <<Java Cass G Flexible Saving (def ault package) <<Java Cass> C NonFlexible Saving (def ault package) o accumulatednterestRate: float o expectedAccumulatedinterestRate: float NonFlexibleSaving) o getExpectedAccumulatedinterestRate)float o setExpectedAccumulatedinterestRate(float) void o toString):String FlexibleSaving) o getAccumulatedinterestRate) float setAccumulatedinterestRate(float):void o toString0:String

public class Checking extends Account {
  
   public float OverdraftLimit;

   /**
   * @return the overdraftLimit
   */
   public float getOverdraftLimit() {
       return OverdraftLimit;
   }

   /**
   * @param overdraftLimit the overdraftLimit to set
   */
   public void setOverdraftLimit(float overdraftLimit) {
       OverdraftLimit = overdraftLimit;
   }
  
   @Override
   public String toString() {
   return this.getClass().getSimpleName() + "Owner Name:" +this.getName();
   }
   }