-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathStackLinkedList.java
More file actions
62 lines (52 loc) · 868 Bytes
/
StackLinkedList.java
File metadata and controls
62 lines (52 loc) · 868 Bytes
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
51
52
53
54
55
56
57
58
59
60
61
62
package com.algs;
import java.util.Iterator;
public class StackLinkedList<Item> implements Iterable<Item> {
private Node first;
private int N;
private class Node
{
Item item;
Node next;
}
public boolean isEmpty()
{
return N == 0;
}
public int size()
{
return N;
}
public void push(Item item)
{
Node oldfirst = first;
first = new Node();
first.item = item;
first.next = oldfirst;
N++;
}
public Item pop()
{
Item item = first.item;
first = first.next;
N--;
return item;
}
public Iterator<Item> iterator()
{
return new ReverseArrayIterator();
}
public class ReverseArrayIterator implements Iterator<Item>
{
private int i = N;
public boolean hasNext()
{
return i > 0;
}
@SuppressWarnings("unchecked")
public Item next(){
return (Item) first.next;
}
public void remove(){
}
}
}