Here is a complete program taking your logic (after fixing the couple of
typos). It works fine; I ran it from the command line with arguments Cat
Chat Chen and Cat Chat Fen, and in both cases it worked. I believe your
error is somewhere else, not in the code you sent us.
import java.util.*;
public class Shirley
{
public static void main(String[] args)
{
Vector myVector = new Vector();
// load the vector with the command line args
for (int x = 0; x < args.length; ++x)
{
myVector.add(args[x]);
}
String[] array1 = new String[myVector.size()];
String tmpString = "";
int j=0;
for (int i=0; i<myVector.size(); i++)
{
tmpString = (String)myVector.get(i);
if (tmpString.indexOf('C') != -1)
{
array1[j] = tmpString;
j++;
}
}
String[] array2 = new String[j];
for (int i=0; i<j; i++)
{
array2[i] = array1[i];
}
// print out the contents of the second array
for (int y = 0; y < array2.length; ++y)
{
System.out.println(array2[y]);
}
}
}
----- Original Message -----
From: Shirley Chen <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Wednesday, December 20, 2000 2:39 PM
Subject: arrays
> Hi,
>
> I have a question, somebody please help me:
>
> I have a vector which will keep all the names the user typed in. Then the
> user supposes can do a query like "give me all the name which starts with
> 'C'". In order to do that, I do something like this:
>
> ...
> String[] array1 = new String[myVector.size()];
> String tempString = "";
> int j=0;
>
> for (int i=0; i<myVector.size(); i++)
> {
> tmpString = (String)myVector.get(i);
> if (tmpString.indexOf('C') != -1)
> {
> array1[j] = tmpString;
> j++;
> }
> }
>
> file://since array1 may not be filled up with data, I transfer it to
another
> String array so I know how many element in the array
>
> String array2 = new String[j];
> for (int i=0; i<j; i++)
> {
> array2[i] = array1[i];
> }
>
> // then I will do display. Supposedly, say, array2.length is 20, if the
user
> wants to display first 5, I will display only the first 5 records, if the
> user wants to display 30, and I will display 20 instead.
> ...
>
> I can display all the situations ok except when myVector contains the
names
> that all start with "C" (which means array2.length should be
> myVector.size()). then the program will crash. I think it might be array
> out of bound problem, but I don't know how to fix it. Please help me.
> _________________________________________________________________
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>
>
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