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JAVA code can only be added to the MessageDetails.java file. Between lines of get code (ie libnes 12 and 14, as seen on image).

JAVA code can only be added to the MessageDetails.java file. Between lines of get code (ie libnes 12 and 14, as seen on image).

Database System Concepts
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
Problem 1PE
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JAVA code can only be added to the MessageDetails.java file. Between lines of get code (ie libnes 12 and 14, as seen on image). 

**Overview of Java Code for Message Handling** The provided Java code demonstrates how to utilize mutator and accessor methods within a class to manage simple message data. The `Message` class includes fields and methods to handle a greeting message and a corresponding area code. **Class and Methods Description:** 1. **Class Definition:** ```java public class Message { ``` The class is defined as `Message` and includes private fields for encapsulating data. 2. **Fields:** ```java private String greeting; private int areaCode; ``` - `greeting`: Stores the greeting message as a `String`. - `areaCode`: Stores the area code as an `int`. 3. **Mutator Methods:** - **setGreeting Method:** ```java public void setGreeting(String inputGreeting) { greeting = "Hi, you have reached " + inputGreeting; } ``` This method sets the `greeting` field by appending the input string to a predefined message. - **setAreaCode Method:** ```java public void setAreaCode(int inputAreaCode) { areaCode = inputAreaCode; } ``` This method assigns the input integer to the `areaCode` field. 4. **Accessor Methods:** - **getGreeting Method:** ```java public String getGreeting() { return greeting; } ``` Returns the current greeting message. - **getAreaCode Method:** ```java public int getAreaCode() { return areaCode; } ``` Returns the current area code. **Usage Example:** When `setGreeting("Dan")` and `setAreaCode(464)` are executed, the output will be: ``` Voicemail: Hi, you have reached Dan at area code 464 ``` **Diagram Explanation:** The image provides a clear view of the code structure with interactive buttons labeled `MessageDetails.java` and `Message.java`, indicating separate Java files for organization and modularity in larger applications.
Transcribed Image Text:**Overview of Java Code for Message Handling** The provided Java code demonstrates how to utilize mutator and accessor methods within a class to manage simple message data. The `Message` class includes fields and methods to handle a greeting message and a corresponding area code. **Class and Methods Description:** 1. **Class Definition:** ```java public class Message { ``` The class is defined as `Message` and includes private fields for encapsulating data. 2. **Fields:** ```java private String greeting; private int areaCode; ``` - `greeting`: Stores the greeting message as a `String`. - `areaCode`: Stores the area code as an `int`. 3. **Mutator Methods:** - **setGreeting Method:** ```java public void setGreeting(String inputGreeting) { greeting = "Hi, you have reached " + inputGreeting; } ``` This method sets the `greeting` field by appending the input string to a predefined message. - **setAreaCode Method:** ```java public void setAreaCode(int inputAreaCode) { areaCode = inputAreaCode; } ``` This method assigns the input integer to the `areaCode` field. 4. **Accessor Methods:** - **getGreeting Method:** ```java public String getGreeting() { return greeting; } ``` Returns the current greeting message. - **getAreaCode Method:** ```java public int getAreaCode() { return areaCode; } ``` Returns the current area code. **Usage Example:** When `setGreeting("Dan")` and `setAreaCode(464)` are executed, the output will be: ``` Voicemail: Hi, you have reached Dan at area code 464 ``` **Diagram Explanation:** The image provides a clear view of the code structure with interactive buttons labeled `MessageDetails.java` and `Message.java`, indicating separate Java files for organization and modularity in larger applications.
### Explanation of Code Snippet for Educational Purposes #### Overview The Java program consists of a class named `MessageDetails` that takes input for a greeting and an area code, and then prints a formatted voicemail message using these inputs. #### Description - **Classes and Methods**: - The program imports the `Scanner` class for taking user input. - The `MessageDetails` class contains the `main` method where the execution starts. - An instance of the `Message` class is created, though the details of this class are not provided in the snippet. - **Functionality**: - The program first initializes a `Scanner` object to read input data. - It then creates a `Message` object named `voicemail`. - Two variables, `inputGreeting` and `inputAreaCode`, are used to store the user's input for the greeting and area code, respectively. - The `inputGreeting` is read using `scnr.next()`, capturing a single word of input. - The `inputAreaCode` is read using `scnr.nextInt()`, capturing a numerical value. - **Code to Insert**: - The placeholder `/* Your code goes here */` suggests that additional instructions are needed, likely involving calling the `setGreeting()` and `setAreaCode()` methods on the `voicemail` object to set these values. - **Output**: - The program outputs the formatted voicemail message: ``` Voicemail: Hi, you have reached [Name] at area code [Code] ``` #### Example If the input is `Dan 464`, the output will be: ``` Voicemail: Hi, you have reached Dan at area code 464 ``` This program illustrates object-oriented principles in Java, showcasing how to manipulate class fields and methods to format strings based on user input.
Transcribed Image Text:### Explanation of Code Snippet for Educational Purposes #### Overview The Java program consists of a class named `MessageDetails` that takes input for a greeting and an area code, and then prints a formatted voicemail message using these inputs. #### Description - **Classes and Methods**: - The program imports the `Scanner` class for taking user input. - The `MessageDetails` class contains the `main` method where the execution starts. - An instance of the `Message` class is created, though the details of this class are not provided in the snippet. - **Functionality**: - The program first initializes a `Scanner` object to read input data. - It then creates a `Message` object named `voicemail`. - Two variables, `inputGreeting` and `inputAreaCode`, are used to store the user's input for the greeting and area code, respectively. - The `inputGreeting` is read using `scnr.next()`, capturing a single word of input. - The `inputAreaCode` is read using `scnr.nextInt()`, capturing a numerical value. - **Code to Insert**: - The placeholder `/* Your code goes here */` suggests that additional instructions are needed, likely involving calling the `setGreeting()` and `setAreaCode()` methods on the `voicemail` object to set these values. - **Output**: - The program outputs the formatted voicemail message: ``` Voicemail: Hi, you have reached [Name] at area code [Code] ``` #### Example If the input is `Dan 464`, the output will be: ``` Voicemail: Hi, you have reached Dan at area code 464 ``` This program illustrates object-oriented principles in Java, showcasing how to manipulate class fields and methods to format strings based on user input.
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