Java Examples - Collection Reversal
Java ExamplesThe following example demonstrates how to use the listIterator() method of the Collection and Listiterator classes and the collection.reverse() method to reverse the elements in a collection:
Main.java file
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.ListIterator;
class Main {
public static void main(String[] args) {
String[] coins = { "A", "B", "C", "D", "E" };
List l = new ArrayList();
for (int i = 0; i < coins.length; i++)
l.add(coins[i]);
ListIterator liter = l.listIterator();
System.out.println("Before reversal");
while (liter.hasNext())
System.out.println(liter.next());
Collections.reverse(l);
liter = l.listIterator();
System.out.println("After reversal");
while (liter.hasNext())
System.out.println(liter.next());
}
}
The output of running the above code is:
反转前 A B C D E 反转后 E D C B AOther Extensions