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Printing a vector

3 replies on 1 page. Most recent reply: Oct 11, 2002 7:48 AM by patrickl

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jake

Posts: 83
Nickname: onorok
Registered: May, 2002

Printing a vector

Posted: Oct 10, 2002 3:30 PM

I have these objects called pairs that consist of two Strings, and I add them to a vector, I just want to know how to print the vector out so that I can see all of the pairs in the vector. Can you guys help me?

Julio C. Fonseca C.

Posts: 18
Nickname: jfonseca
Registered: Mar, 2002

Re: Printing a vector

Posted: Oct 10, 2002 7:09 PM

Hi,

I just would loop through the elements of the vector, make a casting and the print out each one of the objects via a printing mechanism of its class.

I mean something like

class MyClass
{
String a, b;

void Show()
{
System.out.println(a + " " + b);
}

}

class AClass
{
Vector v; //this class contains MyClass objects
void Show ()
{
for (int i = 0; i < v.size(); i++)
((MyClass)(v.elementAt(i))).Show();
}
}

Hope it helps,
Julio

Ian Phillips

Posts: 8
Nickname: ianp
Registered: Oct, 2002

Re: Printing a vector

Posted: Oct 11, 2002 1:24 AM

Or more generally:

for (Iterator i = v.iterator(); i.hasNext();) {
  ((MyClass)v.next()).show();
}

Since this would work efficiently for any java.util.Collection.

Ian.

patrickl

Posts: 2
Nickname: patrickl
Registered: Oct, 2002

Re: Printing a vector

Posted: Oct 11, 2002 7:48 AM

Just implement the toString() method in your Pair class.
Then print the vector. No need for iteration.

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