The Learning Objectives For This Assignment Are To Gain Expe

The learning objectives for this assignment are to gain experience with use of exceptions and file input and output

The goal of this programming assignment is to modify an existing Java program, initially developed in Programming Assignment #2, to incorporate robust exception handling and file processing capabilities. The revised program will read input data from a text file, process the information, and log the results to a new output file. It will also demonstrate multiple types of Java exceptions, including custom exceptions, and use structured exception handling techniques such as try/catch blocks and throw statements.

Specifically, the program will read user choices such as the player's name, difficulty level, and four room numbers from a designated input file. Since the input source is structured and predictable, the "run away" option will be eliminated to maintain consistency. During the game simulation, the choice of tools during the boss battle will be randomized, reflecting a non-interactive, automated process. The program must log all input data, responses, and outcomes to an output file, replacing console display, for easier review and debugging.

The assignment emphasizes demonstrating exception handling by intentionally causing and managing at least three different existing Java exceptions. The program must include a try/catch structure to intercept exceptions gracefully and a throw statement to generate exceptions explicitly when certain conditions are encountered. Additionally, students are required to create a custom exception class that provides detailed error messages and aids in debugging. Examples of exception scenarios include input type mismatches, arithmetic errors (such as invalid number ranges or format errors), failure to open or read the input file, and failure to write to the output file. In the case of input type mismatches, the program should catch the exception, log an appropriate error message, and continue reading the remaining input data.

Paper For Above instruction

The task of integrating exception handling and file input/output into a game simulation reflects a practical approach to developing resilient Java applications. This assignment emphasizes the importance of anticipating and managing runtime errors and demonstrates how robust exception handling contributes to program stability and user experience.

At the core of the project is reading user input data from a text file, which includes critical game parameters such as player name, difficulty level, and room numbers. The initial step involves handling FileNotFoundException or IOException that could occur if the input file is missing or inaccessible. The program must attempt to open and read from the specified file within a try block, and if an exception arises, it should catch and log a meaningful error message, then terminate or prompt for alternative input as appropriate.

Once the input file is successfully read, the program proceeds to process the data, which involves interpreting the player's choices and game settings. To ensure data integrity, the code must validate the input types and values, such as verifying that room numbers are integers within a predefined range. If a mismatch occurs—for example, a non-integer value where an integer is expected—the program must catch the InputMismatchException and log an error message. It should then continue processing the rest of the input, effectively demonstrating the handling of partial errors without halting the entire execution.

Arithmetic errors can occur during game calculations, such as health points going below zero or exceeding maximum thresholds. These can be caught as ArithmeticException, with deliberate checks or by intentionally causing such an exception (e.g., division by zero). When detected, the program can throw a custom exception or handle the error by adjusting the game state accordingly, providing meaningful feedback to the user through logged messages.

During the game, the program simulates a boss battle where the tool choice is randomized. If the random choice leads to an invalid state or an illegal operation, the code should throw an exception explicitly using the throw statement. A custom exception class tailored to game errors is to be implemented, which overloads or customizes the constructor to output detailed, helpful error messages. For instance, if the program encounters an invalid tool choice, it may throw an InvalidToolException, which is then caught in the main control flow, logged, and handled appropriately.

In rehearsal of file writing, the program must open an output file to log the input data, game events, and exception messages. Failures in writing to the output file—such as disk full or permission issues—are to be caught with IOException, and the program should respond accordingly, perhaps by alerting the user or attempting alternative log file locations.

Throughout the process, all exceptions should be neatly handled within try/catch blocks to prevent abrupt terminations. The program should demonstrate at least three concrete exception types, including FileNotFoundException, InputMismatchException, and ArithmeticException. The concrete implementation of exception handling will involve logging error messages to the output file to assist in post-execution debugging and review. Additionally, the use of the throw statement and custom exceptions, such as InvalidInputException, enhances the robustness and clarity of error management.

In summary, this assignment reinforces critical Java programming skills related to exception handling, file processing, and error logging. The program's ability to gracefully recover from errors, continue processing where feasible, and provide clear logs of actual and simulated errors reflects best practices in reliable software development.

References

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• National Institute of Standards and Technology. (2017). Best Practices for Error Handling in Java.