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(Use Java ) Implement the stack ADT using an array to store the data. Implement the push(), pop(), peek(), isEmpty(), and length() methods as specified
(Use Java ) Implement the stack ADT using an array to store the data. Implement the push(), pop(), peek(), isEmpty(), and length() methods as specified in the given interface below.
Design and implement the test class according to the specifications provided.(use Java)
At minimum, the implementation must implement the provided interface and also override the toString method.
public interface Stack | |
/** | |
* Adds a new entry to the top of this stack. | |
* | |
* @param item An object to be added to the stack. | |
* @throws IllegalStateException- if the element cannot be added at this time due to capacity restrictions | |
*/ | |
public void push(T item) throws IllegalStateException; | |
/** | |
* Removes and returns this stack's top entry. | |
* | |
* @return The object at the top of the stack. | |
* @return null if the stack is empty | |
*/ | |
public T pop(); | |
/** | |
* Retrieves this stack's top entry. | |
* | |
* @return The object at the top of the stack. | |
* @return null if the stack is empty | |
*/ | |
public T peek(); | |
/** | |
* Detects whether this stack is empty. | |
* | |
* @return True if the stack is empty. | |
*/ | |
public boolean isEmpty(); | |
/** | |
* Retrieves the number of entries in this stack. | |
* | |
* @return number of entries. | |
*/ | |
public int length(); | |
} |
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