blob: 472e161e133c65889728f7f238e64e0da753a0e1 (
plain)
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
37
38
39
40
41
42
43
44
45
46
47
48
49
50
|
package bjc.utils.esodata;
import java.util.ArrayList;
import java.util.Deque;
import java.util.List;
import java.util.LinkedList;
import java.util.function.Consumer;
/**
* A FIFO implementation of a stack.
*
* @param T The datatype stored in the stack.
* @author Ben Culkin
*/
public class QueueStack<T> extends Stack<T> {
private Deque<T> backing;
/**
* Create a new empty stack queue.
*
*/
public SimpleStack() {
backing = new LinkedList();
}
@Override
public void push(T elm) {
backing.add(elm);
}
@Override
public T pop() {
return backing.remove();
}
@Override
public T top() {
return backing.peek();
}
@Override
public int size() {
return backing.size();
}
@Override
public boolean empty() {
return backing.size() == 0;
}
}
|
