CIS 260 MyStack.java

Code

import java.util.*;

class MyStack {
    private Vector v;
    public MyStack() { v = new Vector(); }
    public void clear() { v.clear(); }
    public void push(int n) { v.addElement(n); }
    public int pop() throws MyStackException {
        int n = peek();
        v.removeElementAt(v.size()-1);
        return n;
    }
    public int peek() throws MyStackException {
        if (isEmpty()) throw new MyStackException("Stack empty");
        else return ((Integer)(v.lastElement())).intValue();
    }
    public boolean isEmpty() { return v.isEmpty(); }
    public void print() { System.out.println(v.toString()); }
}

class MyStackException extends Exception {
    public MyStackException() {}
    public MyStackException(String msg) { super(msg); }
}