# mazharali-12/shopbillingsystem-java architecture

> Architecture diagram of the GitHub repository mazharali-12/shopbillingsystem-java, generated by GitDiagram from its file tree, README and a sample of source files (last updated 2026-11-14). It is an AI-made overview: check details against the source.

- Interactive diagram: https://gitdiagram.com/mazharali-12/shopbillingsystem-java
- Repository: https://github.com/mazharali-12/shopbillingsystem-java

## Overview

Shop Retail Billing System is a Java Swing desktop application for retail inventory, customer credit, supplier management, sales billing, and payment history. A shop operator works through the GUI to manage stock and customers, create discounted bills with cash-and-credit payments, and settle outstanding dues; managers coordinate business logic and JDBC persistence. MySQL supplies the durable records and documented trigger-based stock automation. The sampled source shows billing transactions, dues settlement, and manager-to-database calls; several GUI and database operations are only partially excerpted, so those relationships are omitted where not evidenced.

Main entry points: [`DatabaseManager.java`](https://github.com/mazharali-12/shopbillingsystem-java/blob/main/DatabaseManager.java) (JDBC data access), [`BillingManager.java`](https://github.com/mazharali-12/shopbillingsystem-java/blob/main/BillingManager.java) (Bill generation), [`ShopBillingSystem.java`](https://github.com/mazharali-12/shopbillingsystem-java/blob/main/ShopBillingSystem.java) (Swing application), [`InventoryManager.java`](https://github.com/mazharali-12/shopbillingsystem-java/blob/main/InventoryManager.java) (Inventory management)

## Diagram (Mermaid)

```mermaid
flowchart TD

subgraph group_ui["Desktop interface"]
  node_swing["Swing application"]
end

subgraph group_operations["Retail operations"]
  node_inventory["Inventory management"]
  node_customers["Customer and dues"]
  node_suppliers["Supplier management"]
  node_billing["Bill generation"]
end

subgraph group_records["Domain records"]
  node_bill["Bill<br/>[Bill.java]"]
  node_bill_line["Bill line<br/>[BillLine.java]"]
  node_bill_result["Bill result<br/>[BillResult.java]"]
  node_customer["Customer<br/>[Customer.java]"]
  node_item["Inventory item<br/>[Item.java]"]
  node_payment["Payment<br/>[Payment.java]"]
  node_supplier["Supplier<br/>[Supplier.java]"]
end

subgraph group_persistence["Persistence and automation"]
  node_jdbc["JDBC data access"]
  node_mysql[("MySQL database")]
  node_schema["Schema and triggers"]
end

node_operator(("Shop operator"))

node_operator -->|"uses"| node_swing
node_swing -->|"manages"| node_inventory
node_swing -->|"manages"| node_customers
node_swing -->|"manages"| node_suppliers
node_swing -->|"creates bills"| node_billing
node_inventory -->|"loads and updates"| node_jdbc
node_inventory -->|"looks up"| node_suppliers
node_customers -->|"loads and settles"| node_jdbc
node_suppliers -->|"loads and inserts"| node_jdbc
node_billing -->|"writes bill transaction"| node_jdbc
node_billing -->|"refreshes stock view"| node_inventory
node_billing -->|"refreshes credit view"| node_customers
node_billing -->|"reads line totals"| node_bill_line
node_billing -->|"creates"| node_bill
node_billing -->|"returns"| node_bill_result
node_jdbc -->|"queries via JDBC"| node_mysql
node_jdbc -->|"maps query results"| node_supplier
node_jdbc -->|"maps query results"| node_item
node_jdbc -->|"maps query results"| node_customer
node_jdbc -->|"loads bill records"| node_bill
node_jdbc -->|"loads bill lines"| node_bill_line
node_jdbc -->|"loads payment records"| node_payment
node_schema -.->|"defines tables and triggers"| node_mysql

click node_swing "https://github.com/mazharali-12/shopbillingsystem-java/blob/main/ShopBillingSystem.java"
click node_inventory "https://github.com/mazharali-12/shopbillingsystem-java/blob/main/InventoryManager.java"
click node_customers "https://github.com/mazharali-12/shopbillingsystem-java/blob/main/CustomerManager.java"
click node_suppliers "https://github.com/mazharali-12/shopbillingsystem-java/blob/main/SupplierManager.java"
click node_billing "https://github.com/mazharali-12/shopbillingsystem-java/blob/main/BillingManager.java"
click node_bill "https://github.com/mazharali-12/shopbillingsystem-java/blob/main/Bill.java"
click node_bill_line "https://github.com/mazharali-12/shopbillingsystem-java/blob/main/BillLine.java"
click node_bill_result "https://github.com/mazharali-12/shopbillingsystem-java/blob/main/BillResult.java"
click node_customer "https://github.com/mazharali-12/shopbillingsystem-java/blob/main/Customer.java"
click node_item "https://github.com/mazharali-12/shopbillingsystem-java/blob/main/Item.java"
click node_payment "https://github.com/mazharali-12/shopbillingsystem-java/blob/main/Payment.java"
click node_supplier "https://github.com/mazharali-12/shopbillingsystem-java/blob/main/Supplier.java"
click node_jdbc "https://github.com/mazharali-12/shopbillingsystem-java/blob/main/DatabaseManager.java"
click node_schema "https://github.com/mazharali-12/shopbillingsystem-java/blob/main/shop_billing-dbjava.sql"

classDef toneNeutral fill:#f8fafc,stroke:#334155,stroke-width:1.5px,color:#0f172a
classDef toneBlue fill:#dbeafe,stroke:#2563eb,stroke-width:1.5px,color:#172554
classDef toneAmber fill:#fef3c7,stroke:#d97706,stroke-width:1.5px,color:#78350f
classDef toneMint fill:#dcfce7,stroke:#16a34a,stroke-width:1.5px,color:#14532d
classDef toneRose fill:#ffe4e6,stroke:#e11d48,stroke-width:1.5px,color:#881337
classDef toneIndigo fill:#e0e7ff,stroke:#4f46e5,stroke-width:1.5px,color:#312e81
classDef toneTeal fill:#ccfbf1,stroke:#0f766e,stroke-width:1.5px,color:#134e4a
class node_swing toneBlue
class node_inventory,node_customers,node_suppliers,node_billing toneAmber
class node_bill,node_bill_line,node_bill_result,node_customer,node_item,node_payment,node_supplier toneMint
class node_jdbc,node_mysql,node_schema toneRose
class node_operator toneIndigo
```

## Components

### Desktop interface

- [Swing application](https://github.com/mazharali-12/shopbillingsystem-java/blob/main/ShopBillingSystem.java): `ShopBillingSystem.java`

### Retail operations

- [Inventory management](https://github.com/mazharali-12/shopbillingsystem-java/blob/main/InventoryManager.java): `InventoryManager.java`
- [Customer and dues](https://github.com/mazharali-12/shopbillingsystem-java/blob/main/CustomerManager.java): `CustomerManager.java`
- [Supplier management](https://github.com/mazharali-12/shopbillingsystem-java/blob/main/SupplierManager.java): `SupplierManager.java`
- [Bill generation](https://github.com/mazharali-12/shopbillingsystem-java/blob/main/BillingManager.java): `BillingManager.java`

### Domain records

- [Bill](https://github.com/mazharali-12/shopbillingsystem-java/blob/main/Bill.java): `Bill.java`
- [Bill line](https://github.com/mazharali-12/shopbillingsystem-java/blob/main/BillLine.java): `BillLine.java`
- [Bill result](https://github.com/mazharali-12/shopbillingsystem-java/blob/main/BillResult.java): `BillResult.java`
- [Customer](https://github.com/mazharali-12/shopbillingsystem-java/blob/main/Customer.java): `Customer.java`
- [Inventory item](https://github.com/mazharali-12/shopbillingsystem-java/blob/main/Item.java): `Item.java`
- [Payment](https://github.com/mazharali-12/shopbillingsystem-java/blob/main/Payment.java): `Payment.java`
- [Supplier](https://github.com/mazharali-12/shopbillingsystem-java/blob/main/Supplier.java): `Supplier.java`

### Persistence and automation

- [JDBC data access](https://github.com/mazharali-12/shopbillingsystem-java/blob/main/DatabaseManager.java): `DatabaseManager.java`
- **MySQL database**
- [Schema and triggers](https://github.com/mazharali-12/shopbillingsystem-java/blob/main/shop_billing-dbjava.sql): `shop_billing-dbjava.sql`

### Other components

- **Shop operator**

## Connections

- Shop operator → Swing application: uses (evidence: `README.md`)
- Swing application → Inventory management: manages (evidence: `ShopBillingSystem.java`)
- Swing application → Customer and dues: manages (evidence: `ShopBillingSystem.java`)
- Swing application → Supplier management: manages (evidence: `ShopBillingSystem.java`)
- Swing application → Bill generation: creates bills (evidence: `ShopBillingSystem.java`)
- Inventory management → JDBC data access: loads and updates (evidence: `InventoryManager.java`)
- Inventory management → Supplier management: looks up (evidence: `InventoryManager.java`)
- Customer and dues → JDBC data access: loads and settles (evidence: `CustomerManager.java`)
- Supplier management → JDBC data access: loads and inserts (evidence: `SupplierManager.java`)
- Bill generation → JDBC data access: writes bill transaction (evidence: `BillingManager.java`)
- Bill generation → Inventory management: refreshes stock view (evidence: `BillingManager.java`)
- Bill generation → Customer and dues: refreshes credit view (evidence: `BillingManager.java`)
- Bill generation → Bill line: reads line totals (evidence: `BillingManager.java`)
- Bill generation → Bill: creates (evidence: `BillingManager.java`)
- Bill generation → Bill result: returns (evidence: `BillingManager.java`)
- JDBC data access → MySQL database: queries via JDBC (evidence: `README.md`)
- JDBC data access → Supplier: maps query results (evidence: `DatabaseManager.java`)
- JDBC data access → Inventory item: maps query results (evidence: `DatabaseManager.java`)
- JDBC data access → Customer: maps query results (evidence: `DatabaseManager.java`)
- JDBC data access → Bill: loads bill records (evidence: `DatabaseManager.java`)
- JDBC data access → Bill line: loads bill lines (evidence: `DatabaseManager.java`)
- JDBC data access → Payment: loads payment records (evidence: `DatabaseManager.java`)
- Schema and triggers → MySQL database: defines tables and triggers (evidence: `README.md`)