ArrayList: iterator() : ArrayList « java.util « Java by API






  1. Java by API
  2. java.util
  3. ArrayList

ArrayList: iterator()

  
/**
 *Output: 
Original contents of al: C A E B D F 
Modified list backwards: F+ D+ B+ E+ A+ C+ 

 */

import java.util.ArrayList;
import java.util.Iterator;
import java.util.ListIterator;

public class MainClass {
  public static void main(String args[]) {
    ArrayList<String> al = new ArrayList<String>();

    al.add("C");
    al.add("A");
    al.add("E");
    al.add("B");
    al.add("D");
    al.add("F");

    System.out.print("Original contents of al: ");
    Iterator<String> itr = al.iterator();
    while (itr.hasNext()) {
      String element = itr.next();
      System.out.print(element + " ");
    }
    System.out.println();

    ListIterator<String> litr = al.listIterator();
    while (litr.hasNext()) {
      String element = litr.next();
      litr.set(element + "+");
    }

    // Now, display the list backwards.
    System.out.print("Modified list backwards: ");
    while (litr.hasPrevious()) {
      String element = litr.previous();
      System.out.print(element + " ");
    }
  }
}








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