In Java, Write a program that prompts the user for a positive integer and then prints out all prime numbers up to and including that integer.

For example: if the user enters 20, the program should print.

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Recall that if a number is a prime number it is not divisible by any number except 1 and itself. Use a class PrimeGenerator with methods nextPrime and isPrime. Supply a class PrimePrinter whose main method reads a user input from the command line using the Scanner and constructs a PrimeGenerator object and prints the primes.