I am worked on backend payment provider service for our E-commerce client using spring boot,spring security, spring jdbc, restful api's, microservices.

Java provides the foundation for the application, including the logic for handling user interactions, playing sounds, and managing the beat sequences. The Swing library is used to create the graphical user interface, including buttons, sliders, labels, and the grid-based sequencer. Java file I/O can be used to save and load beat sequences.Multithreading can be employed for handling real-time audio playback while keeping the user interface responsive.

Develop an e-commerce website structure using HTMLUse CSS media queries to apply appropriate styles based on the device's screen width.Develop a shopping cart system that allows users to add, remove, and update items seamlessly.Utilize local storage or cookies to persist cart data across sessions, ensuring a smooth user experience.Display the total price and quantity of items in the cart dynamically, updating in real-time as users interact with the cart using JavaScript.