Arrays

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Introduction

  • Arrays store multiple variables of the same type.
  • The array itself is always an object on the heap (even if it is storing primitive elements).


Declaring

  • int[] scores; (Preferred) or int scores[]; (Legal, but bad)
  • String[] names;
  • int[][] matrix;

Constructing

  • int[] scores = new int[10];
  • This will create a new array object on the heap. All the int values will be assigned their default values, Object references will be assigned null.
  • The array size must be present, when there is no initializer.
  • double[] rates = new double[]; //illegal