Purpose Of This Assignment Is To Implement A Sta

Purpose The purpose of this assignment is to implement a Stack ADT in the two most common ways, an array and a linked list. You will implement stacks for Java double numbers.

The assignment involves creating two implementations of the Stack Abstract Data Type (ADT) for handling double values in Java: one using arrays (ArrayStack) and another using linked lists (ListStack). Both implementations must conform to the DStack interface provided, which includes methods for checking if the stack is empty, pushing, popping, and peeking at elements. The overall goal is to use these stacks to read .dat audio files, reverse the sound data (backmasking), and write the reversed audio data to new files.

The specific tasks include coding the ArrayStack and ListStack classes, ensuring proper handling of stack operations and dynamic resizing for the array-based stack. Additionally, the assignment involves writing a driver program (Reverse) that reads a sound data .dat file, pushes data onto the selected stack implementation, and then pops the data to write the reversed sound file. The process also includes testing, creating meaningful reports, and optional extensions for bonus points, such as resizing strategies.

Paper For Above instruction

The implementation and understanding of data structures like stacks are fundamental in computer science, especially for applications involving data reversal or backmasking in audio processing. The specific context of this assignment involves creating two stack implementations in Java to process sound data stored in .dat files, enabling audio reversal by utilizing the Last-In-First-Out (LIFO) property of stacks. This project not only solidifies knowledge of Java programming and interfaces but also demonstrates how data structures underpin real-world multimedia applications.

The ArrayStack implementation begins with a fixed capacity array (e.g., size 10). When the array becomes full, it dynamically resizes by creating a new array of twice the size and copying existing elements into the new storage manually via a loop. This manual copying process enhances understanding of array management and memory handling. The ArrayStack should throw an EmptyStackException if pop() or peek() is called on an empty stack, as mandated by the interface.

The ListStack implementation employs a linked list where each node contains a data value (double) and a reference to the next node. This structure allows dynamic growth without explicit resizing concerns. As with ArrayStack, pop() and peek() must handle the empty stack case by throwing an exception. Proper comment documentation is essential to clarify method behaviors, especially when handling edge cases.

The Reverse class acts as the control program, managing file input and output. It begins by parsing command-line arguments to determine whether to use list-based or array-based stacks, and specifies input and output filenames with a .dat extension. The program reads the first line to extract the sample rate, then reads subsequent data lines, ignoring comments or non-data lines (e.g., starting with ';'). Data values from the second column across the input file are pushed onto the chosen stack until the end of the file.

Once data reading completes, the program writes a header to the output file indicating the sample rate and then pops data off the stack, writing it to the output file. This reverse order effectively backtracks the audio data, producing a reversed sound file suitable for backmasking techniques used by famous musicians. The implementation ensures proper resource management by closing files after processing, and robust error handling to catch IO and number parsing exceptions.

In addition to implementing the primary functionality, the assignment entails writing a detailed report answering questions about the testing process, the effect of doubling array size on large datasets, and reflections on the experience. Optional bonus components include resizing the array down to half when a certain threshold is reached, improving memory efficiency.

Overall, this assignment deepens understanding of Java interfaces, dynamic arrays, linked lists, exception handling, file I/O, and practical applications of stacks in audio data processing, combining theoretical knowledge with applied programming tasks.

References

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• Audio Processing and Sound Programming in Java. Mark C. Miller. Journal of Audio Engineering Society, 2015.
• Sox – Sound Exchange, a command-line utility for audio processing. https://sox.sourceforge.net/. Accessed October 2023.
• Stack Data Structure in Java. GeeksforGeeks. https://www.geeksforgeeks.org/stack-data-structure/. Accessed October 2023.
• Java I/O Streams. Oracle Documentation. https://docs.oracle.com/javase/tutorial/essential/io/. Accessed October 2023.