Setting up a Collection
Soon, you will learn more about Collection and Map data structures. However, first, explore the required import, construction, and parameterization of one of the Collection types, specifically an ArrayList.
Deze oefening maakt deel uit van de cursus
Data Types and Exceptions in Java
Oefeninstructies
- Import all the types from the Java Collections Framework package.
- Create a variable called
listthat will hold anArrayListof strings, using generics to specifyStringonArrayList. - Set
listto a new instance ofArrayListusing the parameterized constructorArrayList<String>.
Praktische interactieve oefening
Probeer deze oefening eens door deze voorbeeldcode in te vullen.
// Import all types from Collections Framework package
import ____.____.____;
public class HelloWorld {
public static void main(String[] args) {
// Create a variable for a group of Strings
____<____> list;
// Set the variable to new ArrayList
list = ____ ____<____>();
list.add("hello");
System.out.println(list);
}
}