arraylist to java

1List<String> list = new ArrayList<>();
2list.add("a");
3list.add("ab");
4list.add("abc");
5list.add("abcd");
6// convert
7String[] array = list.toArray();

1Integer[] arr = new Integer[al.size()]; 
2  
3        // ArrayList to Array Conversion 
4        for (int i = 0; i < al.size(); i++) 
5            arr[i] = al.get(i); 

1You can only use the to array method if you convert to any object type.
2