import java.util.Scanner; import java.util.HashSet; public class GroceryList { public static void main(String[] args) { Scanner scnr = new Scanner (System.in); HashSet groceries = new HashSet (); String userInput; groceries.add("milk"); groceries.add("cereal"); groceries.add("tomatoes"); groceries.add("bananas"); groceries.add("eggs"); groceries.add("ham"); userInput = scnr.nextLine(); while (userInput.compareTo ("done") != 0) { if (groceries.remove(userInput)) { System.out.println(""); } else { System.out.println(""); } userInput = scnr.nextLine(); } "1 System.out.println("Size: + groceries.size()); Input butter ham chips cereal milk done Output

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
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## Java Programming Exercise: Grocery List

### Programming Code:

```java
import java.util.Scanner;
import java.util.HashSet;

public class GroceryList {
    public static void main(String[] args) {
        Scanner scnr = new Scanner(System.in);
        HashSet<String> groceries = new HashSet<String>();
        String userInput;

        groceries.add("milk");
        groceries.add("cereal");
        groceries.add("tomatoes");
        groceries.add("bananas");
        groceries.add("eggs");
        groceries.add("ham");

        userInput = scnr.nextLine();
        while (userInput.compareTo("done") != 0) {
            if (groceries.remove(userInput)) {
                System.out.println("r");
            } else {
                System.out.println("n");
            }
            userInput = scnr.nextLine();
        }

        System.out.println("Size: " + groceries.size());
    }
}
```

### Task:
Type the program's output as per the given inputs on the right.

### Explanation:

1. **Initialization & Setup:**
   - Import `Scanner` and `HashSet` from Java utilities.
   - Define a public class named `GroceryList`.

2. **Main Method:**
   - Create a `Scanner` object (`scnr`) for user input.
   - Create a `HashSet` named `groceries` to store the grocery items.
   - Add items "milk", "cereal", "tomatoes", "bananas", "eggs", and "ham" to the `groceries` set.

3. **User Input and Processing:**
   - Read the first line of user input.
   - Use a while loop to continue reading inputs until the user types "done".
   - For each input, check if the item is in the `groceries` set:
     - If the item is found in the set and is successfully removed, print "r".
     - If the item is not found in the set, print "n".

4. **Final Output:**
   - After exiting the loop, print the size of the remaining items in the `groceries` set.

### Input and Expected Output:
**Input:**  
```
butter
ham
chips
cereal
milk
done
```

**Output:**  
```
n
r
n
r
r
Size: 3
```

### Diagram:

#### Input Box:
Transcribed Image Text:## Java Programming Exercise: Grocery List ### Programming Code: ```java import java.util.Scanner; import java.util.HashSet; public class GroceryList { public static void main(String[] args) { Scanner scnr = new Scanner(System.in); HashSet<String> groceries = new HashSet<String>(); String userInput; groceries.add("milk"); groceries.add("cereal"); groceries.add("tomatoes"); groceries.add("bananas"); groceries.add("eggs"); groceries.add("ham"); userInput = scnr.nextLine(); while (userInput.compareTo("done") != 0) { if (groceries.remove(userInput)) { System.out.println("r"); } else { System.out.println("n"); } userInput = scnr.nextLine(); } System.out.println("Size: " + groceries.size()); } } ``` ### Task: Type the program's output as per the given inputs on the right. ### Explanation: 1. **Initialization & Setup:** - Import `Scanner` and `HashSet` from Java utilities. - Define a public class named `GroceryList`. 2. **Main Method:** - Create a `Scanner` object (`scnr`) for user input. - Create a `HashSet` named `groceries` to store the grocery items. - Add items "milk", "cereal", "tomatoes", "bananas", "eggs", and "ham" to the `groceries` set. 3. **User Input and Processing:** - Read the first line of user input. - Use a while loop to continue reading inputs until the user types "done". - For each input, check if the item is in the `groceries` set: - If the item is found in the set and is successfully removed, print "r". - If the item is not found in the set, print "n". 4. **Final Output:** - After exiting the loop, print the size of the remaining items in the `groceries` set. ### Input and Expected Output: **Input:** ``` butter ham chips cereal milk done ``` **Output:** ``` n r n r r Size: 3 ``` ### Diagram: #### Input Box:
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