Add Element to Java ArrayList
To add an element or object to Java ArrayList, use ArrayList.add[] method. ArrayList.add[element] method appends the element or object to the end of ArrayList.
Reference to Syntax and Examples ArrayList.add[].
Example 1 Add Element to ArrayList
In the following example, we will create an empty ArrayList and then add elements to it using ArrayList.add[] method.
Java Program
import java.util.ArrayList; public class Example { public static void main[String[] args] { ArrayList arrayList = new ArrayList[]; arrayList.add["a"]; arrayList.add["b"]; arrayList.add["c"]; arrayList.add["d"]; arrayList.add["e"]; System.out.println["ArrayList : " + arrayList]; } }Output
ArrayList : [a, b, c, d, e]Example 2 Add Object to ArrayList
In the following example, we will create an ArrayList of Car objects, and add Car objects to the list.
Java Program
import java.util.ArrayList; public class ArrayListExample { public static void main[String[] args] { ArrayList cars = new ArrayList[]; cars.add[new Car["BMW", 52400]]; cars.add[new Car["Toyota", 66000]]; cars.add[new Car["Audi", 44000]]; for[Car car: cars] { car.printDetails[]; } } } class Car { public String name; public int miles; public Car[String name, int miles] { this.name = name; this.miles = miles; } public void printDetails[] { System.out.println[name + " travelled " + miles + " miles."]; } }Output
BMW travelled 52400 miles. Toyota travelled 66000 miles. Audi travelled 44000 miles.cars.add[new Car["BMW", 52400]]; adds the new Car object to the ArrayList of cars.
Conclusion
In this Java Tutorial, we learned how to add element or object to ArrayList in Java.