Converting 'ArrayList to 'String[]' in Java

Question

How might I convert an ArrayList object to a String[] array in Java?

Answer 1

in case some extra manipulation of the data is desired, for which the user wants a function, this approach is not perfect (as it requires passing the class of the element as second parameter), but works:

import java.util.ArrayList; import java.lang.reflect.Array;

public class Test {
  public static void main(String[] args) {
    ArrayList al = new ArrayList<>();
    al.add(1);
    al.add(2);
    Integer[] arr = convert(al, Integer.class);
    for (int i=0; i T[] convert(ArrayList al, Class clazz) {
    return (T[]) al.toArray((T[])Array.newInstance(clazz, al.size()));
  }
}