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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.

Este exercício faz parte do curso

Data Types and Exceptions in Java

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Instruções do exercício

  • Import all the types from the Java Collections Framework package.
  • Create a variable called list that will hold an ArrayList of strings, using generics to specify String on ArrayList.
  • Set list to a new instance of ArrayList using the parameterized constructor ArrayList<String>.

Exercício interativo prático

Experimente este exercício completando este código de exemplo.

// 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);
	}
}
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