Write a program that allows a user to enter a series of numbers and displays frequency of each number. Implement the following: 1. The user can enter a maximum of 20 numbers or enter-1 to end the series (i.e. they can enter less than 20 numbers by entering -1) 2. Only numbers between 0-9 is allowed (or -1 ); if the user enters a number outside the valid input, inform the user and ask them to enter a valid number; keep repeating till a valid input is entered. Implement reading and validation of user input in a class "UserInput" - it should have a static method getNextNumber() that returns a valid integer. In your main program, use UserInput.getNextNumber() to read a valid input. 3. Display the frequency of each number in the output, in the following format Number: Frequency For example, if the u

Write in Java please

please write in JAVA

In Coral Language 3.22 LAB: Loops: Countdown until matching digits Write a program that takes in an integer in the range 20-98 as input. The output is a countdown starting from the integer, and stopping when both output digits are identical. Ex: If the input is: 93 the output is: 93 92 91 90 89 88 Ex: If the input is: 77 the output is: 77 Ex: If the input is: 9 or any number not between 20 and 98 (inclusive), the output is: Input must be 20-98 For coding simplicity, follow each output number by a space, even the last one. Use a while loop. Compare the digits; do not write a large if-else for all possible same-digit numbers (11, 22, 33, ..., 88), as that approach would be cumbersome for large ranges.

Java Calculating the User's Sum Write a complete program that reads in numbers and calculates the sum of the numbers in that range. Code Specifications In the main method, read input from the user. Read in two integers from the user: a lower end of the range and an upper end of the range. Check if the numbers are valid: the lower number cannot be greater than the upper number. If the numbers are invalid, use a loop to ask for new numbers. Continue looping until you get two valid values. Write a method called calculateTheSum. The method takes in a lower and upper end of the range. The method calculates the sum of all values from lower (inclusive) to upper (inclusive). Invoke the method from main the output the result. Test Cases I recommend testing your code using the test cases below. I've listed the user inputs along with a sample of the result. User Inputs Result lower = 10, upper = 1 the program should ask for new input lower = 5, upper = -5 the program should ask...

This example creates a program to teach a first grade child how to learn subtractions. The program randomly generates two single- digit integers number1 and number2 with number1> number2 and displays a question such as "What is 9 – 2?" to the student. After the student types the answer, the program displays a message to indicate whether the answer is correct.

A company has 5 stores {1, 2, 3, 4, 5}. The sales for each store is as follows: {200, 300, 400, 500, 600}. The tax rate is 6% Write a java program that: 1) Calculates the sales tax for each store and the total sales tax for the company.

This needs to be done in Java! (Calculating Sales) An online retailer sells five products whose retail prices are as follows: Product 1, 2ドル.98; product 2, 4ドル.50; product 3, 9ドル.98; product 4, 4ドル.49 and product 5, 6ドル.87. Write an application that reads a series of pairs of numbers as follows: product number quantity sold Your program should use a switch statement to determine the retail price for each product. It should calculate and display the total retail value of all products sold. Use a sentinel-controlled loop to determine when the program should stop looping and display the final results.