User Input not working with keyboard.nextLine() and String (Java)

Question

I recently started learning java during my spare time. So to practice, I\'m making a program that takes a temperature (Celsius or Fahrenheit) and converts it to the opposite

Answer 1

Never use Scanner#nextLine after Scanner#nextInt. Whenever you hit enter button after Scanner#nextInt than it will skip the Scanner#nextLine command. So, Change from

 int temp = keyboard.nextInt();

to

 int temp = Integer.parseInt(keyboard.nextLine());