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Vector ClassCast exception when looping

2 replies on 1 page. Most recent reply: Apr 6, 2005 7:59 AM by Will

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Will

Posts: 20
Nickname: lofty
Registered: Mar, 2005

Vector ClassCast exception when looping

Posted: Apr 6, 2005 7:39 AM

I'm having a few problems looping through a vector - I can see the problem is that I'm trying to cast an object to a string, but I don't know what to do to fix it - can anyone help?

Vector seed = new Vector(5, 2);
		Iterator sIt = seed.iterator();
		seed.add(new GrassSeed("TT10"));
		seed.add(new GrassSeed("TT21"));
		
		
		for (Iterator i = seed.iterator(); i.hasNext();) {
			String name = (String) i.next();
			System.out.println(name);

Thanks.

Amol Brid

Posts: 43
Nickname: amolbrid
Registered: Feb, 2004

Re: Vector ClassCast exception when looping

Posted: Apr 6, 2005 7:49 AM

Hi,

You cannot cast to String because you have added objects of GrassSeed in Vector. You code should be something like this:

for (Iterator i = seed.iterator(); i.hasNext();) {
    GrassSeed gs = (GrassSeed) i.next();
    System.out.println(gs.getName());
}

where getName() method will return the string passed to the constructor of GrassSeed.

Regards,
Amol Brid.

Will

Posts: 20
Nickname: lofty
Registered: Mar, 2005

Re: Vector ClassCast exception when looping

Posted: Apr 6, 2005 7:59 AM

Ah, that's got it - brilliant, many thanks :)

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