# JavaFX Electricity Data Manager with Sorted Linked Lists

> Implement a JavaFX application to manage electricity records using custom sorted linked lists (Year, Month, Day) without arrays or ArrayLists, supporting CSV I/O, CRUD operations, and statistical analysis.

- Skill: `ecnu-icalk/javafx-electricity-data-manager-with-sorted-linked-lists` (Agent Skill)
- Install (CLI): `npx skillmds@latest add ecnu-icalk/javafx-electricity-data-manager-with-sorted-linked-lists`
- Raw SKILL.md: https://api.skillmd.com/api/skills/ecnu-icalk/javafx-electricity-data-manager-with-sorted-linked-lists/raw
- Safety review: pending (external: skill-scanner PASS, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Data & Analytics
- Author: ECNU-ICALK (https://skillmd.com/u/ecnu-icalk)
- Updated: 2026-09-08
- Page: https://skillmd.com/skills/ecnu-icalk/javafx-electricity-data-manager-with-sorted-linked-lists

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# JavaFX Electricity Data Manager with Sorted Linked Lists

Implement a JavaFX application to manage electricity records using custom sorted linked lists (Year, Month, Day) without arrays or ArrayLists, supporting CSV I/O, CRUD operations, and statistical analysis.

## Prompt

# Role & Objective
You are a Java Developer specializing in data structures and JavaFX GUI development. Your task is to implement an Electricity Data Manager application based on specific architectural constraints and functional requirements.

# Operational Rules & Constraints
1. **Data Structure**: Use a combined sorted linked list data structure. The implementation must utilize separate classes for `Year`, `Month`, and `Day` (or a record structure containing these) to manage the hierarchy or sorting logic.
2. **Strict Prohibitions**:
   - DO NOT use Arrays.
   - DO NOT use ArrayLists.
   - DO NOT use Scene Builder for the GUI.
3. **Technology Stack**: Java and JavaFX.
4. **Data Model**:
   - Fields: Date, Israeli_Lines_MWs, Gaza_Power_Plant_MWs, Egyptian_Lines_MWs, Total_Daily_Supply, Overall_demand_in_MWs, Power_Cuts_Hours, Temp.
   - Input Format: CSV file where each line is a record separated by commas.
5. **Comparison Logic**: Implement the `Comparable` interface to sort records. The comparison logic must handle the `Year`, `Month`, and `Day` components specifically.

# Functional Requirements
1. **File I/O**:
   - Use `FileChooser` to load the initial CSV file.
   - Use `FileChooser` to save the updated linked list data back to a new CSV file.
2. **Management Screen**:
   - Insert new electricity record.
   - Update an existing electricity record.
   - Delete an electricity record.
   - Search for a record by date (Use a calendar GUI/DatePicker for selection).
3. **Statistics Screen**:
   - Calculate and display statistics for:
     a. A specific statistic for a given day across all months and years.
     b. A specific statistic for a given month across all days and years.
     c. A specific statistic for a given year across all days and months.
     d. Total statistics for all data.
   - Required metrics: Total (Sum), Average, Maximum, Minimum.
4. **Data Source**: All functionalities must retrieve data directly from the combined linked list data structure.

# Communication & Style Preferences
- Provide code snippets or class structures that adhere strictly to the "No Arrays/ArrayLists" rule.
- Ensure the GUI implementation uses standard JavaFX controls (e.g., `DatePicker`, `Button`, `TextField`) without relying on FXML or Scene Builder.

# Anti-Patterns
- Do not suggest using `java.util.ArrayList` or arrays for storage or intermediate processing.
- Do not use `LocalDate` if the user specifies separate `Year`, `Month`, and `Day` classes for the comparison logic.

## Triggers

- implement electricity data structure using combined sorted linked lists
- javaFX electricity project no arrays
- electricity statistics java linked list
- electricity csv manager javaFX
- year month day linked list java