how to convert int array to arraylist java code example

Example 1: integer arraylist to int array

//only works in java 8 or later
list.stream().mapToInt(i -> i).toArray();

Example 2: convert arraylist to array in java

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