Answered: Write a non-recursive Java method for…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Question

Write a non-recursive Java method for printing all permutations of the numbers {1,2, ..., n}
Hint: use an explicit stack
public class QueueByStack<E> {
Stack<E> a = new Stack<>();
Stack<E> b = new Stack<>();

public int size() {
//write code here
}

public boolean isEmpty() {
//write code here
}

public void eneque(E e) {
//write code here
}

public E deque() {
//write code here
}

public E first() {
//write code here
}

@Override
public String toString() {
//write code here
}
}

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