package StackImplementation;
public class Stack {
private int maxSize;
private T[] storage;
private int top;
public Stack(int size) {
maxSize = size;
storage = (T[])new Object[maxSize];
top = -1;
}
public void push(T value) {
storage[++top] = value;
}
public T pop() {
return storage[top--];
}
public T top() {
if (storage[top] == null)
return storage[--top];
return storage[top];
}
public boolean empty() {
return top == -1;
}
public long size() {
return ++top;
}
public void swap(Stack obj) {
T[] tmp = obj.storage;
obj.storage = storage;
storage = tmp;
int tmp_maxSize = obj.maxSize;
obj.maxSize = obj.storage.length;
maxSize = tmp_maxSize;
int tmp_top = obj.top;
obj.top = top;
top = tmp_top;
}
}