Unit 7: ArrayList

limitation of arrays

it has a fixed length, and can only store, one specific type of data.

NullPointerException

Extra spaces will simply be ignored, and once you reach one it will result in a

ArrayList

is a solution for this issue.

ArrayList object

is dynamically sized

dynamically sized

it can become smaller or larger as elements are added or removed.

typed ArrayList

ArrayLists are very adaptable, so if you need to make an ArrayList set to a specific type, you set it up as

Integer and Double objects

can be created with integers and doubles, as parameters.

Integer class

The static variables of MIN_VALUE, and MAX_VALUE found in the

Elements

can be accessed with index notation.

Give example of methods used to access ArrayList.

myList.get(2), myList.add(“Bob”)

static variables

it store the minimum and maximum values of an integer.

int and double

The primitive data types that can’t be stored in ArrayLists.

Parameters

Integer and Double objects can be created with integers and doubles

Integer n

new Integer (5);

Double x

new Double (6.1);