Setting up a Collection
Soon, you will learn more about Collection and Map data structures. But first, explore the required import, construction, and parameterization of one of the Collection types - an ArrayList.
This exercise is part of the course
Data Types and Exceptions in Java
Exercise instructions
- 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>.
Hands-on interactive exercise
Have a go at this exercise by completing this sample code.
// 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);
}
}