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.
Deze oefening maakt deel uit van de cursus
Data Types and Exceptions in Java
Oefeninstructies
- Add
"Lima","Bogota","Santiago"to thecapitalsArrayList. - Convert the array in the
euCapitalsvariable to aList. - Sort
capitalsalphabetically. - Reverse the order of
capitals
Praktische interactieve oefening
Probeer deze oefening eens door deze voorbeeldcode in te vullen.
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
Collections.____(____);
System.out.println(capitals);
System.out.println(euCapitalsList);
System.out.println(euCapitals);
}
}