?
?1?package?example;
?2?
?3?import?java.util.ArrayDeque;
?4?import?java.util.Deque;
?5?
?6?public?class?IntegerStack?{
?7?????private?Deque<Integer>?data?=?new?ArrayDeque<Integer>();
?8?
?9?????public?void?push(Integer?element)?{
10?????????data.addFirst(element);
11?????}
12?
13?????public?Integer?pop()?{
14?????????return?data.removeFirst();
15?????}
16?
17?????public?Integer?peek()?{
18?????????return?data.peekFirst();
19?????}
20?
21?????public?String?toString()?{
22?????????return?data.toString();
23?????}
24?
25?????public?static?void?main(String[]?args)?{
26?????????IntegerStack?stack?=?new?IntegerStack();
27?????????for?(int?i?=?0;?i?<?5;?i++)?{
28?????????????stack.push(i);
29?????????}
30?????????System.out.println("elements:?"?+?stack);
31?
32?????????int?m?=?stack.pop();
33?????????System.out.println("Popped?:"?+?m);
34?
35?????????System.out.println("elements:?"?+?stack);
36?
37?????????System.out.println("Peeked?:"?+?stack.peek());
38?????????System.out.println("elements:?"?+?stack);
39?????????System.out.println("first?element:?"?+?stack.data.getFirst());
40?????????System.out.println("last?element:?"?+?stack.data.getLast());
41?????????System.out.println("remove?last?element:?"?+?stack.data.removeLast());
42?????????System.out.println("elements:?"?+?stack);
43?????}
44?}
posted on 2007-09-30 15:23
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