Database System Concepts
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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The image contains a UML diagram with two class boxes connected by arrows. Each class box includes two sections: one for listing instance variables in the constructor and one for listing methods in the class. Below the class boxes, an additional box labeled "Java.util." is connected with an arrow.

### Diagram Details:

1. **Class Boxes:**
   - Both class boxes are identical and labeled "CLASS NAME".
   - Each box contains two sections:
     - Section 1: "List the instance variables in the constructor."
     - Section 2: "List the methods in the class."

2. **Arrows:**
   - A red arrow connects both class boxes, pointing from the first class box to the second.
   - A vertical arrow extends from the second class box to the "Java.util." box, indicating a relationship or dependency.

3. **Java Util Box:**
   - A separate box labeled "Java.util." connected by an arrow, possibly representing a package or class library.

### Explanation:

- The **second row** of the UML diagram details the instance variables in the constructor. For example:
  - `-name: string`
    - `-` indicates a private variable
    - `name` is the variable name
    - `string` is the data type of the variable

- The **third row** of the diagram details the methods within the class. For example:
  - `+getName() : string`
    - `+` indicates a public method
    - `getName` is the method name
    - `()` empty parentheses imply that no parameters are passed to the method
    - `string` indicates the return data type of the method

This UML diagram serves as a template for organizing class structure, highlighting instance variables and methods, and illustrating relationships or dependencies with other classes or packages.
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Transcribed Image Text:The image contains a UML diagram with two class boxes connected by arrows. Each class box includes two sections: one for listing instance variables in the constructor and one for listing methods in the class. Below the class boxes, an additional box labeled "Java.util." is connected with an arrow. ### Diagram Details: 1. **Class Boxes:** - Both class boxes are identical and labeled "CLASS NAME". - Each box contains two sections: - Section 1: "List the instance variables in the constructor." - Section 2: "List the methods in the class." 2. **Arrows:** - A red arrow connects both class boxes, pointing from the first class box to the second. - A vertical arrow extends from the second class box to the "Java.util." box, indicating a relationship or dependency. 3. **Java Util Box:** - A separate box labeled "Java.util." connected by an arrow, possibly representing a package or class library. ### Explanation: - The **second row** of the UML diagram details the instance variables in the constructor. For example: - `-name: string` - `-` indicates a private variable - `name` is the variable name - `string` is the data type of the variable - The **third row** of the diagram details the methods within the class. For example: - `+getName() : string` - `+` indicates a public method - `getName` is the method name - `()` empty parentheses imply that no parameters are passed to the method - `string` indicates the return data type of the method This UML diagram serves as a template for organizing class structure, highlighting instance variables and methods, and illustrating relationships or dependencies with other classes or packages.
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