// Zorah Fung, CSE 143
// Some examples of using ArrayLists

import java.util.*;

// Translation from array to ArrayList:
//      String[]             ArrayList<String>
//      new String[n]        new ArrayList<String>()
//      list[i]              list.get(i)
//      list[i] = val        list.set(i, val);
//      list.length          list.size()
// New operations:
//      list.add(val)        appends val to list
//      list.add(i, val)     inserts val at index i shifting subsequent values to the right
//      list.remove(i)       removes and returns the value at i
//      list.clear()         clears the entire ArrayList


public class ArrayListExamples {
   public static void main(String[] args) {
      ArrayList<String> list = new ArrayList<String>();
      
      System.out.println("length of list is " + list.size());

      list.add("it's");
      list.add("friday");
      list.add("friday");
      list.add("gotta");
      list.add("get");
      list.add("down");
      list.add("on");
      list.add("thursday"); 
  
      list.set(7, "friday");
      
      // Size changes automatically
      System.out.println("length of list is " + list.size());
      
      ArrayList<Integer> numbers = new ArrayList<Integer>();
      
      numbers.add(42);
      numbers.add(17);
      numbers.add(99);
      numbers.add(-2);
     
      // ArrayLists know how to print themselves. 
      System.out.println("numbers = " + numbers);
   }
}