Java-ZeroToHero-/Program101.java at main · affu-79/Java-ZeroToHero- · GitHub

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import java.util.ArrayDeque;
import java.util.Deque;

public class Program101 {
// Using Deque to implement a stack

    public static void main(String[] args) {
        Deque<Integer> stack = new ArrayDeque<>();

        stack.push(100);
        stack.push(200);
        System.out.println(stack.pop()); // 200
        System.out.println(stack.peek()); // 100
    }
}