List at least 6 suggestions for improving this class. Highlight the code using a box and the draw an arrow from that box to write your comments in the right column (example shown).
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import java.util.ArrayList; import java.util.Collections; import java.util.Comparator; import java.util.Iterator; /** * Maintains a bike inventory. Each bike in the inventory * is identified using a unique Stock Number. The bike inventory * provides three functionalities. 1) Adding a new bike to the * inventory 2) Removing a bike from the inventory using the unique * stock number */ public class BikeInventory { private ArrayList<Bike> list_of_bikes; public boolean addBike(int stockNumber, String bikeMake, String bikeModel,int bikeYear, int bikeMileage, float bikePrice) { Bike newEntry; try{ newEntry = new Bike(stockNumber,bikeMake, bikeModel,bikeYear, bikeMileage,bikePrice); }catch(InvalidBikeException ice){
} this.list_of_bikes.add(newEntry); return true; } public boolean removeBike(int stockNumber) { Iterator<Bike> itr = list_of_bikes.iterator(); while (itr.hasNext()) { if (itr.next().stockNumber == stockNumber) itr.remove(); } return true; } private class Bike { public int stockNumber; // stock number of the bike, unique public String bikeMake; // Make of the bike e.g. Toyota public String bikeModel; // Model of the bike, e.g. Camry public int bikeYear; // Year of the bike public int bikeMileage; // bike mileage public float bikePrice; // listed price
public Bike(int stockNumber, String bikeMake, String bikeModel,int bikeYear, int bikeMileage, float bikePrice) throws InvalidBikeException{
if(stockNumber<0) return InvalidBikeException(“Invalid inventory!”); newEntry.stockNumber = stockNumber; newEntry.bikeMake = bikeMake; newEntry.bikeModel = bikeModel; newEntry.bikeYear = bikeYear; newEntry.bikeMileage = bikeMileage; newEntry.bikePrice = bikePrice;
} @Override public String toString() { return ("Stock#" + stockNumber + ": " + bikeYear + " " + bikeMake + " " + bikeModel + " \n Mileage:" + bikeMileage + "\n Price: " + bikePrice + "\n\n"); } } } |
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I HAVE ADDED THE 6 NEW SUGGESTION AS COMMENTS IN UPPER CASE
import java.util.ArrayList; // THIS IS NOT NEEDED AS LONG AS YOU IMPORT JAVA.UTIL.*
import java.util.Collections;
import java.util.Comparator;
import java.util.Iterator;
/**
* Maintains a bike inventory. Each bike in the inventory
* is identified using a unique Stock Number. The bike inventory
* provides three functionalities. 1) Adding a new bike to the
* inventory 2) Removing a bike from the inventory using the unique
* stock number
*/
public class BikeInventory {
private ArrayList<Bike> list_of_bikes; //CHANGE IT TO PUBLIC AS IT WILL NOT BE ACCESSIBLE BY main
public boolean addBike(int stockNumber, String bikeMake,
String bikeModel,int bikeYear, int bikeMileage, float bikePrice) {
Bike newEntry;
try{
newEntry = new Bike(stockNumber,bikeMake,
bikeModel,bikeYear, bikeMileage,bikePrice);
}catch(InvalidBikeException ice){
}
this.list_of_bikes.add(newEntry);
return true;
}
public boolean removeBike(int stockNumber) {
Iterator<Bike> itr = list_of_bikes.iterator();
while (itr.hasNext()) {
if (itr.next().stockNumber == stockNumber)
itr.remove();
}
return true;
}
private class Bike { //CAN BE WRITTEN A PUBLIC AND A SEPERATE CLASS OF ITS OWN
public int stockNumber; // stock number of the bike, unique // PRIVATE AS INCLUDUNG ABSTRACTION WHEN BIKE IS A SEPERATE CLASS
public String bikeMake; // Make of the bike e.g. Toyota
public String bikeModel; // Model of the bike, e.g. Camry
public int bikeYear; // Year of the bike
public int bikeMileage; // bike mileage
public float bikePrice; // listed price
public Bike(int stockNumber, String bikeMake,
String bikeModel,int bikeYear, int bikeMileage,
float bikePrice) throws InvalidBikeException{
if(stockNumber<0)
return InvalidBikeException(“Invalid inventory!”); // THROWING EXCEPTION INSIDE CONSTRUCTION IS A BAD PRACTICE .ONE CAN A NEW FUNCTION FOR IT
newEntry.stockNumber = stockNumber;
newEntry.bikeMake = bikeMake;
newEntry.bikeModel = bikeModel;
newEntry.bikeYear = bikeYear;
newEntry.bikeMileage = bikeMileage; // USE (this.) INSTEAD OF newEntry .IT WILL MAKE THE CODE LESS COMPLEX
newEntry.bikePrice = bikePrice;
}
@Override
public String toString() {
return ("Stock#" + stockNumber + ": " + bikeYear + "
" + bikeMake + " " + bikeModel + " \n Mileage:" +
bikeMileage + "\n Price: " + bikePrice + "\n\n");
}
}
}
List at least 6 suggestions for improving this class. Highlight the code using a box and...
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