Page 35 - Abstract Class, Interface & Struktur Data
P. 35

Other Types









             •        Elements in an ArrayList are actually objects. In the examples above, we created elements (objects) of type




                      "String". Remember that a String in Java is an object (not a primitive type). To use other types, such as int, you

                      must specify an equivalent wrapper class: Integer. For other primitive types, use: Boolean for boolean, Character


                      for char, Double for double, etc:

             •        Create an ArrayList to store numbers (add elements of type Integer):
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