Difference between Array and ArrayList in Java

 Program using Array:

public static void main(String[] args) { Reader r = new InputStreamReader(System.in); BufferedReader reader = new BufferedReader(r); // Read strings from the keyboard String[] list = new String[10]; for (int i = 0; i < list.length; i++) { String s = reader.readLine(); list[i] = s; } // Display the contents of the array for (int i = 0; i < list.length; i++) { int j = list.length - i - 1; System.out.println( list[j] ); } }

Program using ArrayList:

public static void main(String[] args)

{ Reader r = new InputStreamReader(System.in); BufferedReader reader = new BufferedReader(r); // Read strings from the keyboard ArrayList<String> list = new ArrayList<String>(); for (int i = 0; i < 10; i++) { String s = reader.readLine(); list.add(s); } // Display the contents of the collection for (int i = 0; i < list.size(); i++) { int j = list.size() - i - 1; System.out.println( list.get(j) ); }