Java: Delete elements of list while iterating

Using ‘iterator’, you can delete elements of list while iterating.

public static void printAndDeleteElements(List<?> list) {

         Iterator<?> iter = list.iterator();

         while (iter.hasNext()) {

                  Object element = iter.next();

                  System.out.println(element);

                  iter.remove();

         }

}

App.java

package com.sample.app;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

public class App {

 public static void printAndDeleteElements(List<?> list) {
  Iterator<?> iter = list.iterator();

  while (iter.hasNext()) {
   Object element = iter.next();
   System.out.println(element);
   iter.remove();
  }

 }

 public static void main(String args[]) {
  List<String> hobbies = new ArrayList<>();
  hobbies.add("chess");
  hobbies.add("cricket");
  hobbies.add("tennis");

  System.out.println("Number of hobbies : " + hobbies.size() + "\n");
  printAndDeleteElements(hobbies);
  System.out.println("\nNumber of hobbies : " + hobbies.size());

 }

}

Output

Number of hobbies : 3

chess

cricket

tennis

Number of hobbies : 0

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