2 questions by java code please

Write a program to check the given number is prime or not. Prime no: A prime number is a whole number greater than 1 , whose only two wholenumber factors are 1 and itself. Enter a number: 45 45 is not a prime number Enter a number: 13 13 is a prime number 2. Write an application that prompts the user for an integer and then prints out all prime numbers up to that integer. Enter the value of n:20 The prime numbers between 2 and 20 are 1235711131719