Account Simulation Project

This Java project demonstrates a multi-threaded account simulation using concurrent programming concepts such as ExecutorService, Locks, and Conditions.

Project Overview

The AccountWithConditionUsers class simulates a user account with two concurrent operations:

1. Adding money to the account
2. Removing money from the account

These operations are performed by two separate threads, demonstrating thread safety and coordination using ReentrantLock and Condition.

Key Components

1. UserAccount: A class representing the user's account with methods to add and remove money.
2. AddMoney: A Runnable implementation that simulates adding random amounts of money to the account.
3. RemoveMoney: A Runnable implementation that simulates removing random amounts of money from the account.

Features

• Concurrent execution of add and remove operations
• Thread-safe account balance management
• Condition-based waiting when attempting to remove more money than the current balance
• Random amounts for add and remove operations
• Timed execution (60 seconds) using ExecutorService

How it Works

1. The program creates an ExecutorService with a fixed thread pool of 2 threads.
2. It submits AddMoney and RemoveMoney tasks to the executor.
3. The executor runs for 60 seconds, during which:
   • AddMoney thread adds random amounts to the account every 2 seconds.
   • RemoveMoney thread attempts to remove random amounts from the account every 2 seconds.
4. If the removal amount exceeds the current balance, the thread waits until sufficient funds are available.
5. After 60 seconds, the executor is shut down, and the program terminates.

Running the Project

To run this project:

1. Ensure you have Java Development Kit (JDK) installed on your system.
2. Compile the Java file:

   javac org/vinam/AccountWithConditionUsers.java
   

3. Run the compiled class:

   java org.vinam.AccountWithConditionUsers
   

Output

The program will output the add and remove operations, along with the current balance, for 60 seconds. Example output:

Added:   5		Current balance: 5
Removed: 3		Current balance: 2
Added:   7		Current balance: 9
Insufficient Balance while removing: 10
Added:   6		Current balance: 15
Removed: 10		Current balance: 5

Notes

• This project is for demonstration purposes and simulates a simplified version of concurrent account operations.
• The use of ReentrantLock and Condition ensures thread-safe operations on the shared account balance.
• The project runs for a fixed duration of 60 seconds. You can modify this in the main method if needed.