//intstackarray.java

import java.util.*;

                  
public class intStackRetObjectArray 
{
	
	private int[] elems;
	private int top; 
         
	public intStackRetObjectArray() {
		top = 0;
		elems = new int[10];
	}
                     
	public intStackRetObjectArray push(int i)  {
		if (top < 10)
		{
			elems[top++] = i;
		}
		return this;
	}

	public intStackRetObjectArray pop()  {
		if (top > 0)
		{
		  top--;
		}
		 return this;
	}
	
	public int top()  {
		int temp;
			try {
				temp = elems[(top-1)];
			}catch (ArrayIndexOutOfBoundsException exception){
				System.out.println("stack is empty");
				temp = -1;
			}
			return temp;
	}
        
	public boolean isEmpty() {
		return top == 0;
	}
	
	public boolean equals(intStackRetObjectArray s) {
		if (top != s.getTop())
		{
			return false;
		}
		for(int i = 0; i<top ; i++)
		{
			if( elems[i] != (s.getArray())[i] )
			{
				return false;
			}
		}
		return true;
	}
	 
	 private int[] getArray(){
		return elems;
	}
	
	 private int getTop(){
		return top;
	}
} // End intStackArray


 //public boolean isFull() {
    //return top == max;
    //}