java transform arraylist to array code example

Example 1: java arraylist to array

List<String> list = new ArrayList<>();
list.add("a");
list.add("ab");
list.add("abc");
list.add("abcd");
// convert
String[] array = list.toArray();

Example 2: java array to arraylist

List<Element> list = Arrays.asList(array);

Example 3: arraylist to array java

ArrayList<String> ArrayLister=new ArrayList<>(){ArrayLister.add("Hi")};
String[] array=ArrayLister.toArray(String[]);

Example 4: convert arraylist to array in java

Integer[] arr = new Integer[al.size()]; 
for (int i = 0; i < al.size(); i++) 
     arr[i] = al.get(i);