Chapter 19, Problem 4PP

Program Plan Intro

Factorials

Program plan:

Filename: “StreamUtil.java”

• Include the required header files
• Define the class “StreamUtil”
  • Define the “factorials” method
    • Return the factorial of passed values using stream.

Filename: “Main.java”

• Include the required header files
• Define the class “Main”
  • Define the “main” method
    • Call the “printFactorial” method with value “3” and display the result.
    • Display the expected value
    • Call the “printFactorial” method with value “4” and display the result.
    • Display the expected value
    • Call the “printFactorial” method with value “5” and display the result.
    • Display the expected value
  • Define the “printFactorial” method
    • Call the “factorials” method in “StreamUtil” class