convert arraylist of arraylist to single array code example

Example 1: 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);

Example 2: arraylist to java

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