Question

In: Computer Science

public class GroceryCart { private static final int DEFAULT_CAPACITY = 10; /* * Default constructor with...

public class GroceryCart {

private static final int DEFAULT_CAPACITY = 10;

/*

* Default constructor with zero arguments. This constructs a grocery

* cart with a default capacity of ten items.

*/

public GroceryCart() {

}

/*

* Alternate constructor which takes in a maxCapacity. This maxCapacity

* determines how many items can fit inside of this groceryCart.

*/

public GroceryCart(int maxCapacity) {

}

/*

* Adds an item to the grocery cart. Returns true if the item was added

* successfully (i.e. there was still room in the cart to add it.

*/

public boolean addItem(String item, Double cost) {

return false;

}

/*

* Removes the specified item from the cart. Returns true if the item was

* successfully removed (i.e. the item existed in the cart).

*/

public boolean removeItem(String item) {

return false;

}

/*

* Empties the cart of all contents.

*/

public void emptyCart() {

}

/*

* Returns a string representation of the carts contents. The contents

* should be printed out in alphabetical order. It should be of

* the form, "item:price, item:price, item:price". An example:

* "Green Beans:2.99, Milk:41.99, Rolled Oats:1.99, Zucchini:2.67"

*/

public String toString() {

return "";

}

Expert Solution

NOTE: Since you have not enclosed any description of the problem, I am providing the definitions of all the methods as per my understanding.

CODE

class Grocery {

private String item;

private double cost;

public Grocery(String item, double cost) {

this.item = item;

this.cost = cost;

}

public String getItem() {

return item;

}

public double getCost() {

return cost;

}

public class GroceryCart {

private static final int DEFAULT_CAPACITY = 10;

private Grocery[] groceries;

private int size;

/*

* Default constructor with zero arguments. This constructs a grocery

* cart with a default capacity of ten items.

*/

public GroceryCart() {

groceries = new Grocery[DEFAULT_CAPACITY];

size = 0;

}

/*

* Alternate constructor which takes in a maxCapacity. This maxCapacity

* determines how many items can fit inside of this groceryCart.

*/

public GroceryCart(int maxCapacity) {

groceries = new Grocery[maxCapacity];

size = 0;

}

/*

* Adds an item to the grocery cart. Returns true if the item was added

* successfully (i.e. there was still room in the cart to add it.

*/

public boolean addItem(String item, Double cost) {

if (size >= groceries.length) {

return false;

}

groceries[size ++] = new Grocery(item, cost);

}

/*

* Removes the specified item from the cart. Returns true if the item was

* successfully removed (i.e. the item existed in the cart).

*/

public boolean removeItem(String item) {

for (int i=0; i<groceries.length; i++) {

if (groceries[i].getItem().equals(item)) {

for (int j=i; j<groceries.length; j++) {

groceries[j] = groceries[j+1];

}

size --;

return true;

}

return false;

}

/*

* Empties the cart of all contents.

*/

public void emptyCart() {

groceries = new Grocery[DEFAULT_CAPACITY];

}

/*

* Returns a string representation of the carts contents. The contents

* should be printed out in alphabetical order. It should be of

* the form, "item:price, item:price, item:price". An example:

* "Green Beans:2.99, Milk:41.99, Rolled Oats:1.99, Zucchini:2.67"

*/

public String toString() {

String res = "";

for(int i=0; i<groceries.length; i++) {

res += groceries[i].getItem() + ":" + groceries[i].getCost() + ", ";

}

return res.substring(0, res.length() - 2);

}

venereology answered 9 months ago

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