June 2012
Intermediate to advanced
288 pages
6h 48m
English
Content preview from Java For Dummies Quick Reference
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ArrayList Class
Package: java.util
The ArrayList package lets you create and maintain a special type of collection object: an array list. An array list is similar to an array but averts many of the most common problems of working with arrays, specifically the following:
An array list automatically resizes itself whenever necessary.
An array list lets you insert elements into the middle of the collection.
An array list lets you delete items.
Constructors
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Constructor |
Explanation |
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Creates an array list with an initial capacity of ten elements. |
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Creates an array list with the specified initial capacity. |
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Creates an array list and copies all the elements from the specified collection into the new array list. |
Methods
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Method |
Explanation |
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Adds the specified object to the array list. If you specified a type when you created the array list, the object must be of the correct type. |
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Adds the specified object to the array list at the specified index position. If you specified a type when you created the array list, the object must be of ... |
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