Unit 8 - 2D Arrays

Vocab

• Array = a data structure used to implement a collection (list) of primitive or object reference data
• Element = a single value in the array
• Index = the position of the element in the array (starts from 0)
• Array Length = the number of elements in the array
  • Is public, so can be accessed in any class
  • Is also final, so can’t change it after array has been created

2D Arrays

• A 2D array is an array of arrays, and can be a better way to store data