Why Arrays are Useful

  • Bunch of variables smashed together in an organized fashion
  • Reduces the number of variables you'll need to use
  • Can be sorted

Things to Note

  • Arrays have a different syntax than just creating a bunch of variables
  • You can cause errors by going outside the boundaries of Arrays (ArrayIndexOutOfBoundsException)
  • Arrays come in different forms: Arrays and ArrayLists
    • Arrays need to have their size defined before you can use them
    • ArrayLists don't need their size defined and can grow and shrink dynamically
  • Arrays are zero based (i.e. an item at position 0 is actually the FIRST item in the array, item at position 1 is the second and so on)

Multi-dimensional Arrays

  • Remember math class? Think of them like a matrix

Homework:

Read https://www.coderscampus.com/java-arrays/

Free Java Beginners Course

Start learning how to code today with our free beginners course. Learn more.

Thank you for your message. It has been sent.
There was an error trying to send your message. Please try again later.