hello,
i just start learning java.please solve my following problem:


Q: Write a simple program that allows a user to push up to ten names onto a stack as well as popping them off the stack.

my code is:

import DataStructures.*;

public class StackDemo {

public static void main(String[] args) {

stack a = new StackArray();

for (int i = 0; i < 10;i++) {
s.push(new Integer(i));
}

while (!s.isEmpty()) {

System.out.println(s.pop());
}
}
}


it is not running properly.other question is if i want to enable other data types such as an int, float, double and char to be pushed into the stack what changes do i need to make? and if i want to do the same program to a Queue what i have to do?

please try to solve my problem as soon as possible. it's urgent. thank you for helping me.

shantuli :o