BloodMatch

A simple CLI-based Java application that matches blood donors with patient requests based on blood type, city, and urgency (priority). The system uses multithreading to simulate urgency-based scheduling for real-life donor matching scenarios.

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📁 Prepare data files

Before starting the application, make sure the following files exist inside the data directory. You can create them as empty files:

data/donors.txt  
data/patients.txt

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⚙️ Compile the source

javac -d out src/main/java/BloodMatch/src/bloodmatch/*.java

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▶️ Run the application

java -cp out BloodMatch.src.bloodmatch.Main

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🧭 How to Use

• Use the menu to:
  • Add a new donor
  • Add a new patient request
  • Display all donors or patients
  • Match donors with patient requests based on urgency

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💡 Example Output

===BLOOD MATCH SYSTEM===
1. Add donor
2. Add patient
3. Show all donors
4. Show all requests
5. Match donors with requests
6. Exit
Choose: 1

Enter id: D100
Enter name: Alice Smith
Enter email: alice@example.com
Enter city: Denver
Enter blood type: O-NEG

Alice Smith with id D100 has been written to our database successfully.

===BLOOD MATCH SYSTEM===
Choose: 2

Enter id: P200
Enter name: Bob Jones
Enter city: Denver
Enter blood type: O-NEG
Enter urgency(1-10): 8

P200 has been written to our database successfully.

Choose: 5

To quit the buffer, enter 'exit'
Enter id: P200
D100 is suitable for P200 with O-
[NEW THREADS STARTED – suspended...]
Making operation for P200...
Operation for P200 is completed.

Match processing complete. Queue empty.

Choose: 6
Terminating the program.

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✅ Notes

• This project demonstrates use of:
  • File I/O
  • Collections (List)
  • Custom Thread logic (suspend/resume)
  • Simple matching logic based on real-life hospital workflow

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🏁 End

Developed for educational purposes to simulate a basic blood donation management system.