Java Deque.peekFirst()
Syntax
Deque.peekFirst() has the following syntax.
E peekFirst()
Example
In the following code shows how to use Deque.peekFirst() method.
import java.util.ArrayDeque;
import java.util.Deque;
// ww w .java 2 s . co m
public class Main {
public static void main(String[] args) {
Deque<Integer> deque = new ArrayDeque<Integer> (8);
deque.add(1);
deque.add(2);
deque.add(4);
deque.add(5);
int retval = deque.peekFirst();
System.out.println("Retrieved Element is " + retval);
System.out.println(deque);
}
}
The code above generates the following result.
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