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javaarraysarraylist

How can I create an Array of ArrayLists?

I am wanting to create an array of arraylist like below:

ArrayList<Individual>[] group = new ArrayList<Individual>()[4];

But it's not compiling. How can I do this?

Solution

  • As per Oracle Documentation:

    "You cannot create arrays of parameterized types"

    Instead, you could do:

    ArrayList<ArrayList<Individual>> group = new ArrayList<ArrayList<Individual>>(4);

    As suggested by Tom Hawting - tackline, it is even better to do:

    List<List<Individual>> group = new ArrayList<List<Individual>>(4);