How to properly define an array of linked list in Java ? [duplicate]

Answer 1

First of all define the array size where each element is a LinkedList.

LinkedList hashTable[] = new LinkedList[10];

Now since each element in the array is a LinkedList itself and all of them are null each of them needs to be initialized. Hence,

for (int i=0;i<10;i++)
        hashTable[i] = new LinkedList();

If you want to add data to a list, then do it like this:

hashTable[i].add(YOUR_LONG_DATA_HERE);

and finally to iterate,

for (int i=0;i<10;i++){
        for (Long j: hashTable[i])
            System.out.println(j);
}