Creating a deep copy

Question

I wrote a stack implementation using a LinkedList, I have null constructor to create the first stack and it works fine but now i have to create a copy for a second stack using the element of the first constructor
this my code
import java.util.LinkedList;
public class Stack<T>{
  private LinkedList<T> stack;
  public Stack(){
    stack =  new LinkedList<T>();
  public Stack(Stack<T> s) {// the problem is here it compile but when i run
                                                 // the program the second stack raised an exception because is empty
                                                 // i want to create a deep copy with the elements of the first stack
     stack = new LinkedList<T>();
  public boolean isEmpty(){
  return stack.isEmpty();
  public void push(T item){
   /*method to add object information
    *pre the object is not full
    * pos: the object is inserted
      stack.addFirst(item);
  public T top() throws EmptyStackException{
    if (!stack.isEmpty()){ 
      return stack.getFirst();
    else{
      throw new EmptyStackException("StackException on top " + " Stack empty");
  public T pop() throws EmptyStackException{
    /*method to remove an element of the stack
    *pre the object is not empty
    * pos: the object is remove
    * response throws an exception
    if (!stack.isEmpty()){ 
      return stack.removeFirst();
    else{
      throw new EmptyStackException("StackException on top" + "stack empty");
public int numElements(){
    return stack.size();
public void clear(){
  stack.clear();
public class EmptyStackException extends Exception{
        public EmptyStackException( String message){
          super(message);
}

Answer 1

wel well... are you doing this on a mobile phone???
neways to get to ur question u can use the clone() method to generate a clone of your object which is the same as a deep copy for eg:
public class CloneTest{
    CloneTest test1 = new CloneTest();
    CloneTest test2;
    CloneTest(){
      //Some initialization code;
    CloneTest(CloneTest temp){
         test2 = test1.clone();
}clone is a method of the object class.