Wrap queue to synchronize the methods

      

import java.util.Collections;
import java.util.LinkedList;

public class Main {
  public static void main(String[] argv) throws Exception {

    LinkedList queue = new LinkedList();
    Object object = "";
    queue.add(object);

    Object o = queue.removeFirst();

    queue = (LinkedList) Collections.synchronizedList(queue);
  }
}

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Wrap queue to synchronize the methods : Link List « Collections Data Structure « Java

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