Complete the two Java programs below. The first one, PrimeGenerator, generates prime numbers, and the second one, prompts the user for an integer, and then prints out all prime numbers up to that integer. For example, when the user enters 10, the program should print: 2 3 5 7

/** This class generates all prime numbers.

*/ public class PrimeGenerator { private int current; public PrimeGenerator() { current = 1; }

/** Calculates the next prime number. @return the next prime number

*/ public int nextPrime() { // Complete this part ... }

/** Check if n is a prime number. @param n to check whether it is prime or not @return true if n is prime

*/ public static boolean isPrime(int n) { // Complete this part ... } } import java.util.Scanner;

/** 2 This class prints prime numbers.

*/ public class PrimePrinter { public static void main (String[] args) { Scanner in = new Scanner(System.in); System.out.print("Enter upper limit: "); int limit = in.nextInt();

// Complete this part ... } }