java arraylist get object index code example

Example 1: ArrayList indexOf(Object o) method in java

import java.util.ArrayList;
public class ArrayListIndexOfMethodExample
{
   public static void main(String[] args)
   {
      ArrayList<Integer> al = new ArrayList<Integer>(5);
      al.add(8);
      al.add(6);
      al.add(5);
      al.add(7);
      al.add(9);
      System.out.print("ArrayList values are: ");
      for(Integer num : al)
      {
         System.out.print(num);
         System.out.print(" ");
      }
      // indexOf() method to find index of 5
      int position = al.indexOf(5);
      System.out.println("\nElement 5 is at index: " + position);
   }
}

Example 2: java arraylist access index

List<String> cities = new ArrayList<String>();
cities.add("Tuguegarao City");
cities.add("Tabuk City");
cities.add("Davao City");

System.out.println(cities.get(1)); //prints "Tabuk City"