Question

Write a Java program which displays a menu to allow user the following functionality:

1. Load employees’ data - prompts user for the number of employees to be loaded and then prompts for each employee name, id (5 digit number), and annual salary
2. Add new employee - prompts user for an employee data, name, id, and annual salary
3. Display all employees - displays each employee’s data to the console, one employee per line
4. Retrieve specific employee’s data - prompts user for the employee id and displays the corresponding employee’s data: id, name, and salary
5. Retrieve employees with salaries based on range - prompts user for the lowest and highest salary and displays all employees with salaries in that range. Display each employee on separate line with all information - name, id, and salary
6. Exit

Answer 1

The student's question pertains to writing a Java program for managing employee data, which involves implementing several functionalities such as adding and retrieving employee details. The program would likely involve a menu loop, use of classes, and dynamic data structures for efficient management.

Step-by-step explanation:

Java Program for Employee Management

This Java program should meet the requirements as described, allowing for various operations related to employee data management. It involves a menu-driven approach using a while loop to continually display the menu until the user chooses to exit. The Scanner class is used for input, and a custom Employee class may be created to store individual employee data. Here's a simplified version of what the program structure would look like:

1. Define an Employee class with name, ID, and salary attributes.
2. Use a dynamic data structure like ArrayList to hold Employee objects.
3. Display options in a menu format and prompt for user input using System.in.
4. Implement functions for each menu option, such as loading data, adding new employees, displaying all employees, retrieving specific employee data, and retrieving employees within a salary range.
5. Include data validation for employee ID and salary.
6. Loop back to the main menu after each operation is completed, until the exit option is selected.

The use of Object-Oriented Programming principles can make the code more organized and modular, and exception handling can ensure that it is robust against invalid inputs.