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Using Collections and Arrays

In this exercise, you will see how the Collections Framework supporting classes of Collections and Arrays can help you manipulate and work with data more easily.

Este ejercicio forma parte del curso

Data Types and Exceptions in Java

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Instrucciones del ejercicio

  • Add "Lima", "Bogota", "Santiago" to the capitals ArrayList.
  • Convert the array in the euCapitals variable to a List.
  • Sort capitals alphabetically.
  • Reverse the order of capitals

Ejercicio interactivo práctico

Prueba este ejercicio y completa el código de muestra.

import java.util.*;

public class AllTheCities {

	public static void main(String[] args) {
		String[] euCapitals = {"Paris", "London", "Prague"};
		ArrayList capitals = new ArrayList();
        
        // Add cities to capitals all at once
		Collections.____(____, "Lima", "Bogota", "Santiago");
        // Convert euCapitals to List
        ____<____> euCapitalsList = Arrays.____(euCapitals);
        // Sort capitals
        ____.____(capitals);
        // Reverse capitals
        ____;
        
		System.out.println(capitals);
		System.out.println(euCapitalsList);
		System.out.println(euCapitals);
	}
}
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