Problems with using other classes methods/instances

[laMonaca]

Hi, I'm new to Java, and I've got a problem with it.

I'm writing a class that reverts the content of a stack;

In the folder there are: ReverseStackUsingTwoStacks.java
ArrayListStack.java ==> Interface that wraps ArrayList, making an ArrayList instance a Stack
ArrayListStack.class

When I try to compile the code you're reading under my post, the compiler says

"error: cannot find symbol
ArrayListStack temp2 = new ArrayListStack<Integer>();
^
symbol: class ArrayListStack
location: class ReverseStackUsingTwoStacks"

Here is the code:

import static java.lang.System.*;
import java.util.Scanner;



public class ReverseStackUsingTwoStacks
{   public static void main(String[] args)
	{    Scanner in = new Scanner(System.in);
	     ArrayListStack<Integer> stack = new ArrayListStack<Integer>();
	     while (in.hasNextInt())
	     {    stack.push(in.nextInt());
		 }

		 StackInverter(stack);
		 while (!stack.isEmpty())
		 out.println(stack.pop());
	}

	public static void StackInverter(ArrayListStack<Integer> stack)
	{    ArrayListStack temp1 = new ArrayListStack<Integer>();
	     ArrayListStack temp2 = new ArrayListStack<Integer>();

	     while (!stack.isEmpty())
	     {    int element = stack.pop();
	          temp1.push(element);
		 }

		 while (!temp1.isEmpty())
		 {    int element = temp1.pop();
		      temp2.push(element);
		 }

		 while (!temp2.isEmpty())
		 {    int element = temp2.pop();
		      stack.push(element);
		 }
	}



}

PS do not focus on single programming error, my problem is that even when creating an instance of ArrayListStack, the compiler says he do not find the symbol etc etc.

Thanks.

[milovan]

please wrap your code in code tags.

[laMonaca]

Done, sorry, I've never even posted a piece of code before.

[huntack]

It seems from the pasted code that you forgot to import the class for ArrayListStack. Does it keep failing to compile when you do import it?

[laMonaca]

It seems from the pasted code that you forgot to import the class for ArrayListStack. Does it keep failing to compile when you do import it?

But, I knew that a class in the same directory has not to be imported, it is not in a package...
There's the interface:

import java.util.ArrayList;
public class ArrayListStack<T>
{  private ArrayList<T> a;
   public ArrayListStack()     { a = new ArrayList<T>(); }
   public int size()           { return a.size(); }
   public boolean isEmpty()    { return a.isEmpty(); }
   public void push(T element) { a.add(element); }
   public T top()
   {  if (isEmpty()) throw new java.util.NoSuchElementException();
      return a.get(a.size()-1);
   }
   public T pop()
   {  if (isEmpty()) throw new java.util.NoSuchElementException();
      return a.remove(a.size()-1);
   }
}

!!!!SOLVED!!!!
I just added the whole C: to Classpath system variable, now it compiles. Sorry for the disturb. Thanks.