Collections Java Tutorial

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import java.util.LinkedList;
import java.util.Queue;
public class Main {
    public static void main(String[] args) {
        Queue queue = new LinkedList();
        
        queue.add("A");
        queue.add("B");
        
        queue.offer("C");
        queue.offer("D");
        System.out.println("remove: " + queue.remove());
        System.out.println("element: " + queue.element());
        
        System.out.println("poll: " + queue.poll());
        System.out.println("peek: " + queue.peek());
    }
}
/*
remove: A
element: B
poll: B
peek: C
*/