I'm trying to output a Mad Lib story, but I keep getting an "Exception in thread" error. How do I fix my code?

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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I'm trying to output a Mad Lib story, but I keep getting an "Exception in thread" error. How do I fix my code?

### Java Program to Take User Input

The following Java code snippet demonstrates how to use the `Scanner` class from the `java.util` package to take user inputs.

```java
import java.util.Scanner;

public class LabProgram {
    public static void main(String[] args) {
        Scanner scnr = new Scanner(System.in);

        String firstName;
        String genericLocation;
        int wholeNumber;
        String pluralNoun;

        firstName = scnr.next();
        genericLocation = scnr.next();
        wholeNumber = scnr.nextInt();
        pluralNoun = scnr.next();
    }
}
```

**Explanation:**

1. **Imports:**
    ```java
    import java.util.Scanner;
    ```
   - This line imports the `Scanner` class which is necessary for taking input from the user.

2. **Class Declaration:**
    ```java
    public class LabProgram {
    ```
   - This declares a public class named `LabProgram`.

3. **Main Method:**
    ```java
    public static void main(String[] args) {
    ```
   - This is the entry point of the Java program. The `main` method is where the program execution begins.

4. **Creating `Scanner` Object:**
    ```java
    Scanner scnr = new Scanner(System.in);
    ```
   - Creates a `Scanner` object named `scnr` which takes input from standard input (keyboard).

5. **Variable Declarations:**
    ```java
    String firstName;
    String genericLocation;
    int wholeNumber;
    String pluralNoun;
    ```
   - Declares four variables: `firstName` and `genericLocation` of type `String`, `wholeNumber` of type `int`, and `pluralNoun` of type `String`.

6. **Taking Inputs:**
    ```java
    firstName = scnr.next();
    genericLocation = scnr.next();
    wholeNumber = scnr.nextInt();
    pluralNoun = scnr.next();
    ```
   - This block of code takes user input for each variable:
     - `firstName` uses `scnr.next()` to read a `String`.
     - `genericLocation` uses `scnr.next()` to read a `String`.
     - `wholeNumber` uses `scnr.nextInt()` to read an `int`.
     - `pluralNoun` uses `scnr.next()` to
Transcribed Image Text:### Java Program to Take User Input The following Java code snippet demonstrates how to use the `Scanner` class from the `java.util` package to take user inputs. ```java import java.util.Scanner; public class LabProgram { public static void main(String[] args) { Scanner scnr = new Scanner(System.in); String firstName; String genericLocation; int wholeNumber; String pluralNoun; firstName = scnr.next(); genericLocation = scnr.next(); wholeNumber = scnr.nextInt(); pluralNoun = scnr.next(); } } ``` **Explanation:** 1. **Imports:** ```java import java.util.Scanner; ``` - This line imports the `Scanner` class which is necessary for taking input from the user. 2. **Class Declaration:** ```java public class LabProgram { ``` - This declares a public class named `LabProgram`. 3. **Main Method:** ```java public static void main(String[] args) { ``` - This is the entry point of the Java program. The `main` method is where the program execution begins. 4. **Creating `Scanner` Object:** ```java Scanner scnr = new Scanner(System.in); ``` - Creates a `Scanner` object named `scnr` which takes input from standard input (keyboard). 5. **Variable Declarations:** ```java String firstName; String genericLocation; int wholeNumber; String pluralNoun; ``` - Declares four variables: `firstName` and `genericLocation` of type `String`, `wholeNumber` of type `int`, and `pluralNoun` of type `String`. 6. **Taking Inputs:** ```java firstName = scnr.next(); genericLocation = scnr.next(); wholeNumber = scnr.nextInt(); pluralNoun = scnr.next(); ``` - This block of code takes user input for each variable: - `firstName` uses `scnr.next()` to read a `String`. - `genericLocation` uses `scnr.next()` to read a `String`. - `wholeNumber` uses `scnr.nextInt()` to read an `int`. - `pluralNoun` uses `scnr.next()` to
### Program Errors and Debugging

#### Exception in Java

When running a Java program, an exception error may occur if the run-time environment detects an issue. An example of such an error is shown below:

```
Exception in thread "main" java.util.NoSuchElementException
    at java.base/java.util.Scanner.throwFor(Scanner.java:937)
    at java.base/java.util.Scanner.next(Scanner.java:1478)
    at LabProgram.main(LabProgram.java:15)
```

This error message indicates that a `NoSuchElementException` has been thrown. This typically occurs when one tries to access an element that does not exist. In this case, it’s happening within the `Scanner.next()` method. The error trace pinpoints the exact locations in the code where problems occurred:

1. **java.util.Scanner.throwFor** - Located at line 937 in `Scanner.java`.
2. **java.util.Scanner.next** - Located at line 1478 in `Scanner.java`.
3. **LabProgram.main** - Located at line 15 in `LabProgram.java`.

#### Coding Trail of Your Work

Below the error message, there appears to be a coding trail tracker:

```
6/8 W-----------4-----------3----------- min:68
```

This coding trail shows the progress of your work and might represent various checkpoints, changes, and possibly the time spent coding.

1. **6/8**: Possibly represents the number of completed tasks or levels out of a total of 8.
2. **W**: The letter might indicate a specific milestone or a point where significant work was done.
3. **4 and 3**: These numbers could represent different stages or steps in the coding process.

This tracker can help you visualize and keep track of your coding progress and milestones.

#### Icons at the Bottom

At the bottom of the screen, various application icons are displayed, which include:

- A web browser icon.
- File explorer.
- Email application.
- Cloud storage service.
- Office tools.

These icons suggest that you might have multiple tools at your disposal to assist with coding, documentation, and communication.

### Summary

Understanding and interpreting error messages are crucial for debugging. The `NoSuchElementException` in this example provides precise locations where the error occurs. Additionally, using coding trail features and tools can assist in maintaining an organized approach to coding and error resolution.
Transcribed Image Text:### Program Errors and Debugging #### Exception in Java When running a Java program, an exception error may occur if the run-time environment detects an issue. An example of such an error is shown below: ``` Exception in thread "main" java.util.NoSuchElementException at java.base/java.util.Scanner.throwFor(Scanner.java:937) at java.base/java.util.Scanner.next(Scanner.java:1478) at LabProgram.main(LabProgram.java:15) ``` This error message indicates that a `NoSuchElementException` has been thrown. This typically occurs when one tries to access an element that does not exist. In this case, it’s happening within the `Scanner.next()` method. The error trace pinpoints the exact locations in the code where problems occurred: 1. **java.util.Scanner.throwFor** - Located at line 937 in `Scanner.java`. 2. **java.util.Scanner.next** - Located at line 1478 in `Scanner.java`. 3. **LabProgram.main** - Located at line 15 in `LabProgram.java`. #### Coding Trail of Your Work Below the error message, there appears to be a coding trail tracker: ``` 6/8 W-----------4-----------3----------- min:68 ``` This coding trail shows the progress of your work and might represent various checkpoints, changes, and possibly the time spent coding. 1. **6/8**: Possibly represents the number of completed tasks or levels out of a total of 8. 2. **W**: The letter might indicate a specific milestone or a point where significant work was done. 3. **4 and 3**: These numbers could represent different stages or steps in the coding process. This tracker can help you visualize and keep track of your coding progress and milestones. #### Icons at the Bottom At the bottom of the screen, various application icons are displayed, which include: - A web browser icon. - File explorer. - Email application. - Cloud storage service. - Office tools. These icons suggest that you might have multiple tools at your disposal to assist with coding, documentation, and communication. ### Summary Understanding and interpreting error messages are crucial for debugging. The `NoSuchElementException` in this example provides precise locations where the error occurs. Additionally, using coding trail features and tools can assist in maintaining an organized approach to coding and error resolution.
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