StackInterface.java

package com.codehackersblog.stack;

/**
*
* @author PsychoCoder
*/
public interface StackInterface {
   
   /**
    *
    * @param item Inserts an element into the stack.
    */
   public abstract void push(int item);
   
   /**
    *
    * @return Returns the element removed from the stack
    */
   public abstract int pop();
   
   
   /**'
    *
    * @return Returns true is the stack is empty
    */
   public abstract boolean isEmpty();
   
   /**
    *
    * @return Returns true if the stack is full
    */
   public abstract boolean isFull();
   
   /**
    *
    * @return Returns the top element of the array
    */
   public abstract int peek();
   
   /**
    *
    * @return Returns the size of the array
    */
   public abstract int size();
   
}