FilesExpand file tree

 master

/

queueWithStack.java

Copy path

BlameMore file actions

BlameMore file actions

Latest commit

 

History

History

History

36 lines (30 loc) · 719 Bytes

 master

/

queueWithStack.java

Top

File metadata and controls

• Code
• Blame

36 lines (30 loc) · 719 Bytes

Raw

Copy raw file

Download raw file

Open symbols panel

Edit and raw actions

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

public class queueWithStack {

Stack<Integer> inbox = new Stack<Integer>();

Stack<Integer> outbox = new Stack<Integer>();

//push element x to the back of queue

public void push(int x) {

inbox.push(x);

}

//removes the element from in front of queue

public void pop() {

if (outbox.isEmpty()) {

while(!inbox.isEmpty()){

outbox.push(inbox.pop());

}

}

outbox.pop();

}

//get the front element.

public int peek() {

if (outbox.isEmpty()){

while(!inbox.isEmpty()){

outbox.push(inbox.pop());

}

}

outbox.peek();

}

//return whether the queue is empty.

public boolean empty() {

return inbox.isEmpty() && outbox.isEmpty();

}

}