how to copy a stack to a other stack without destorying....

[Jay008]

how to copy a stack to a new stack without destorying the original one?
the stack is an array. simple code please.

I have tried something like this, but the old one is gone.
/*
stack temp=new stack(a.count);
while(!a.isEmpty()
{
temp.push(a.pop())
}

return temp;
*/

[Ruchi Dhar]

Stack extends from Vector so you can use all the methods available in Vector.
The simplest way of copying stack is to clone it

Stack temp = a.clone();

Other wise get all elements in the stack by calling method toArray() and
copy each of them into new stack;

Stack temp = new Stack(a.size());
Object[] obj = a.toArray();
for(int i=0; i<obj.length; i++)
temp.push(obj[i]);

"Jay008" <mph100@hotmail.com> wrote:
>
>how to copy a stack to a new stack without destorying the original one?
>the stack is an array. simple code please.
>
>I have tried something like this, but the old one is gone.
>/*
>stack temp=new stack(a.count);
>while(!a.isEmpty()
>{
> temp.push(a.pop())
>}
>
>return temp;
>*/
>

[Jay008]

If the original stack "a" is also an array. will your 2nd method still work?
by the way, thanks alot!

"Ruchi Dhar" <rdhar@verticalnet.com> wrote:
>
>Stack extends from Vector so you can use all the methods available in Vector.
> The simplest way of copying stack is to clone it
>
>Stack temp = a.clone();
>
>Other wise get all elements in the stack by calling method toArray() and
>copy each of them into new stack;
>
>Stack temp = new Stack(a.size());
>Object[] obj = a.toArray();
>for(int i=0; i<obj.length; i++)
> temp.push(obj[i]);
>
>"Jay008" <mph100@hotmail.com> wrote:
>>
>>how to copy a stack to a new stack without destorying the original one?
>>the stack is an array. simple code please.
>>
>>I have tried something like this, but the old one is gone.
>>/*
>>stack temp=new stack(a.count);
>>while(!a.isEmpty()
>>{
>> temp.push(a.pop())
>>}
>>
>>return temp;
>>*/
>>
>

[Ruchi Dhar]

If "a" is an array best thing is to use System.arrayCopy() it is optimized
for copying arrays. I wrote the below one thinking that there is a stack
called "a".

"Jay008" <mph100@hotmail.com> wrote:
>
>If the original stack "a" is also an array. will your 2nd method still work?
>by the way, thanks alot!
>
>"Ruchi Dhar" <rdhar@verticalnet.com> wrote:
>>
>>Stack extends from Vector so you can use all the methods available in Vector.
>> The simplest way of copying stack is to clone it
>>
>>Stack temp = a.clone();
>>
>>Other wise get all elements in the stack by calling method toArray() and
>>copy each of them into new stack;
>>
>>Stack temp = new Stack(a.size());
>>Object[] obj = a.toArray();
>>for(int i=0; i<obj.length; i++)
>> temp.push(obj[i]);
>>
>>"Jay008" <mph100@hotmail.com> wrote:
>>>
>>>how to copy a stack to a new stack without destorying the original one?
>>>the stack is an array. simple code please.
>>>
>>>I have tried something like this, but the old one is gone.
>>>/*
>>>stack temp=new stack(a.count);
>>>while(!a.isEmpty()
>>>{
>>> temp.push(a.pop())
>>>}
>>>
>>>return temp;
>>>*/
>>>
>>
>