What does the following initialization mean ?<br /> <br /> ArrayList<LinkedList> traversalPaths = new ArrayList<LinkedList>();<br /> <br /> What could be the use of such a collection.
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 Q1. What does the following initialization mean ?

ArrayList<LinkedList> traversalPaths = new ArrayList<LinkedList>();

What could be the use of such a collection.
Core Java2017-07-23 08:33:28

Ans. Initialize an ArrayList that will hold LinkedLists i.e every element of the arraylist will be a linked list.

Such collection could be used in algorithms that require first random access and then sequential traversal. For example - Storing traversal paths for a graph wherein we can start from any vertex. Implementing dictionary with each arraylist element holding staring with character and then linked list holding duplicate words.

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