Data Structure

ArrayList

---

// the data type must be a type of class
ArrayList<String>  a = new ArrayList<String>();
ArrayList<Integer> b = new ArrayList<Integer>();

// the size of the ArrayList
arrayList.size();

// add data to the ArrayList
arrayList.add("DATA");

// replace data by returning the value of the replaced data
arrayList.set();

// remove data by returning the value of the removed data
arratList.remove();

How to traverse the ArrayList