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Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Question
Complete this code to swap the first and last element of the given array. Do nothing if the array is empty.
![The image shows a Java programming environment in which a user is editing a Java file titled `Numbers.java`. The code snippet displayed is part of a class definition and includes a method stub that appears to be incomplete. Below is a transcription suitable for an educational website:
---
**Java Programming: Understanding Method Definitions**
This example demonstrates a basic setup of a Java class and a method that is prepared for custom implementation.
```java
public class Numbers {
public static void swapFirstLast(int[] values) {
/* Your code goes here */
}
}
```
**Code Explanation:**
- **public class Numbers**: This line declares a public class named `Numbers`. In Java, classes are the blueprint for creating objects, and this class is the outer container for methods and variables.
- **public static void swapFirstLast(int[] values)**: Here, a static method named `swapFirstLast` is defined. It takes an array of integers (`int[] values`) as its parameter. The `void` keyword indicates that this method does not return a value.
- **/* Your code goes here */**: This comment inside the method body suggests that this is where the logic for swapping the first and last elements of the array would be implemented.
At the bottom of the screen, there is a console output displaying information, likely related to a separate program run:
```
0 2 4 6 8
Fred Amy Cindy Henry
2 4 6 8
Enter scores, -1 to quit:
12 25 20 0 10 -1
You entered the following scores:
12 25 20 0 10
Process finished with exit code 0
```
**Console Output Explanation:**
- Series of numbers (`0 2 4 6 8`) and names (`Fred Amy Cindy Henry`).
- A prompt: "Enter scores, -1 to quit", followed by a series of entered scores: `12 25 20 0 10 -1`.
- Confirmation of the entered scores: `12 25 20 0 10`.
- The process finishes with an exit code of 0, indicating successful execution.
This setup provides an environment for learners to practice coding a method in Java, enhancing their understanding of class structures and console interaction.](https://content.bartleby.com/qna-images/question/d6e87594-a0d7-48c0-af39-cad58e8108aa/f1036f8f-79db-463f-b7da-c97d07accac2/18w3ds6_thumbnail.jpeg)
Transcribed Image Text:The image shows a Java programming environment in which a user is editing a Java file titled `Numbers.java`. The code snippet displayed is part of a class definition and includes a method stub that appears to be incomplete. Below is a transcription suitable for an educational website:
---
**Java Programming: Understanding Method Definitions**
This example demonstrates a basic setup of a Java class and a method that is prepared for custom implementation.
```java
public class Numbers {
public static void swapFirstLast(int[] values) {
/* Your code goes here */
}
}
```
**Code Explanation:**
- **public class Numbers**: This line declares a public class named `Numbers`. In Java, classes are the blueprint for creating objects, and this class is the outer container for methods and variables.
- **public static void swapFirstLast(int[] values)**: Here, a static method named `swapFirstLast` is defined. It takes an array of integers (`int[] values`) as its parameter. The `void` keyword indicates that this method does not return a value.
- **/* Your code goes here */**: This comment inside the method body suggests that this is where the logic for swapping the first and last elements of the array would be implemented.
At the bottom of the screen, there is a console output displaying information, likely related to a separate program run:
```
0 2 4 6 8
Fred Amy Cindy Henry
2 4 6 8
Enter scores, -1 to quit:
12 25 20 0 10 -1
You entered the following scores:
12 25 20 0 10
Process finished with exit code 0
```
**Console Output Explanation:**
- Series of numbers (`0 2 4 6 8`) and names (`Fred Amy Cindy Henry`).
- A prompt: "Enter scores, -1 to quit", followed by a series of entered scores: `12 25 20 0 10 -1`.
- Confirmation of the entered scores: `12 25 20 0 10`.
- The process finishes with an exit code of 0, indicating successful execution.
This setup provides an environment for learners to practice coding a method in Java, enhancing their understanding of class structures and console interaction.
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