ArrayList class is only the tip of the Java collections iceberg. The Java library contains many collections classes, each with its own advantages. This table contains an abbreviated list.
| Class Name | Characteristic |
| ArrayList | A resizable array. |
| LinkedList | A list of values, each having a field that points to the next one in the list. |
| Stack | A structure (which grows from bottom to top) that's optimized for access to the topmost value. You can easily add a value to the top or remove it from the top. |
| Queue | A structure (which grows at one end) that's optimized for adding values to one end (the rear) and removing values from the other end (the front). |
| PriorityQueue | A structure, like a queue, that lets certain (higher-priority) values move toward the front. |
| HashSet | A collection containing no duplicate values. |
| HashMap | A collection of key/value pairs. |
AbstractCollection, the ancestor of all collection classes).To find out which collection classes best meet your needs, visit the Android API documentation pages.