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Converting ArrayList to String Array

3 replies on 1 page. Most recent reply: Jul 22, 2004 5:38 PM by RajeshKr

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Flat View: This topic has 3 replies on 1 page

Srilatha

Posts: 3
Nickname: psr
Registered: Jun, 2004

Converting ArrayList to String Array

Posted: Jun 29, 2004 3:53 PM

Hi,

I'm Trying to convert the ArrayList to String[].
I'm Getting Run time Exception.

Here is My code
ArrayList uList;
String[] sList = (String[])uList.toArray(new String[0]);

I'm getting the java.lang.ArrayStoreException.

Please, any one can help me.
I Appreciate Your help.
Thx in advance.

Kishori Sharan

Posts: 211
Nickname: kishori
Registered: Feb, 2002

Re: Converting ArrayList to String Array

Posted: Jun 30, 2004 3:18 PM

I guess when you are populating uList arraylist then all of your elements are not strings. Can you please post the code where you are populating the uList?

vijaya

Posts: 5
Nickname: vijji
Registered: Dec, 2002

Re: Converting ArrayList to String Array

Posted: Jul 20, 2004 5:46 AM

You can do like this...

import java.util.ArrayList;
public class ArrtoStr
{
public static void main(String[] args)
{
ArrayList ar = new ArrayList();
for(int i=0;i<5;i++){
ar.add("Vijaya"+i);//arraylist data
}
Object obj[]=(Object[])ar.toArray();//converting into an object array.
for(int j=0;j<obj.length;j++)
{
System.out.println("string value is "+obj[j].toString());//converting object into string
}

}
}

Thanks & Regards
Vijaya.

RajeshKr

Posts: 1
Nickname: rajeshkr
Registered: Jul, 2004

Re: Converting ArrayList to String Array

Posted: Jul 22, 2004 5:38 PM

> ArrayList uList;
> String[] sList = (String[])uList.toArray(new String[0]);
> ;
> I'm getting the java.lang.ArrayStoreException.

In your above code the "new String[0]" is the problem.
You can try toArray(new String[uList.size()]);

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