Introduction to ArrayList

AP Computer Science A· difficulty 2/5

Which is a correct ArrayList declaration?

  • A

    ArrayList list = new ArrayList(int);

  • B

    ArrayList<Integer> list = new ArrayList<>();

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  • C

    ArrayList<int> list = new ArrayList<int>();

  • D

    ArrayList<int> list = new ArrayList<>();

Explanation

Generic type parameter must be a reference type; use <code>Integer</code> (not <code>int</code>).

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