Critical Resource Manager (JavaBasics_Task_174_V0.1)

📖 Description

This project illustrates the behavior of the finally block when an exception occurs but is not caught by a catch block. It proves that the Java Virtual Machine guarantees the execution of the finally block before the program terminates due to a fatal error, which is essential for resource cleanup.

📋 Requirements Compliance

• Task: Intentionally cause a division by zero error in the try block.
• Constraint: Do not use a catch block.
• Mechanism: Implement a finally block to display a sensor message.
• Goal: Observe that the finally message is printed before the program crashes with an exception.

🚀 Architectural Stack

• Java 8+

🏗️ Implementation Details

The try-finally structure is used when we want to ensure specific code runs regardless of success or failure, but we want the exception to propagate further (to the caller or the JVM). In this case, the ArithmeticException is thrown, the finally block executes its print statement, and then the JVM terminates the thread with the error log.

📋 Expected result

=====================================================================
Sensor reports: finally execution completed. Even in case of a crash.
=====================================================================

The following message comes from the JVM, which terminates the thread
and writes an error to the error log:

Exception in thread "main" java.lang.ArithmeticException: / by zero
	at com.yurii.pavlenko.Solution.main(Solution.java:10)

Process finished with exit code 1

💻 Code Example

Project Structure:

src/com/yurii/pavlenko/
                └── Solution.java

Code

package com.yurii.pavlenko;

public class Solution {
    public static void main(String[] args) {
        try {
            int result = 5 / 0;
            System.out.println("Result: " + result);

        } finally {
            System.out.println("=====================================================================");
            System.out.println("Sensor reports: finally execution completed. Even in case of a crash.");
            System.out.println("=====================================================================");
            System.out.println();
            System.out.println("The following message comes from the JVM, which terminates the thread\n" +
                               "and writes an error to the error log:");
            System.out.println();
        }
    }
}

⚖️ License

This project is licensed under the MIT License.

Copyright (c) 2026 Yurii Pavlenko

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files...

License: MIT