import java.util.*;
import java.util.Queue;
public class PeakMethod {
public static void main(String[] args) {
// TODO Auto-generated method stub
ArrayDeque<String> que = new ArrayDeque<>();
que.add("A");
que.add("D");
que.add("B");
que.add("A");
que.add("E");
que.add("F");
que.add("D");
que.add("B");
System.out.println("Full-List : "+que);
System.out.println("peek() : "+que.peek());
System.out.println("PeakFirst() : "+que.peekFirst());
System.out.println("PeakLast() : "+que.peekLast());
}
}
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