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public interface Stack
Stack interface.
Method Summary | |
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Object |
examine()
examine the item on the top of the stack |
boolean |
isEmpty()
test whether the stack is empty |
Object |
pop()
remove the item at the top of the stack |
void |
push(Object a)
insert an item on the top of the stack |
Method Detail |
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boolean isEmpty()
void push(Object a) throws Overflow
a
- the item to insert
Overflow
Object examine() throws Underflow
Underflow
- if the stack is emptyObject pop() throws Underflow
Underflow
- if the stack is empty
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