Re: [appengine-java] Re: Java while statement bug on GAE server?
Wow Thank you Don
you have a very keen eye.
On Wed, Oct 27, 2010 at 12:53 AM, l.denardo lorenzo.dena...@gmail.comwrote:
I need a good pair of glasses :-)
On Oct 26, 5:42 pm, Don Schwarz schwa...@google.com wrote:
Yes, it's a bug in your code:
while(tempFlag == true);
Note the semicolon. Try removing it.
On Tue, Oct 26, 2010 at 10:22 AM, doc123 doc.u...@gmail.com wrote:
Sorry to use specific sample code. So I tried more basic following
code.
try
{
int i =0;
boolean tempFlag = false;
while(tempFlag == true);
{
i++;
out.println(tempFlag + i + := + tempFlag);
tempFlag = false;
}
}
catch(Exception e)
{
out.println(Error + e.toString());
}
what I got is tempFlag1:=false but out.print is within
a while(tempFlag
== true) bock.
I think this is bug.
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[appengine-java] Re: Java while statement bug on GAE server?
Don't know APIs very well, but anyway it looks like in the while
version you check one link in the condition, then request newLink
again in the method body. At the end of the list you check for the
last element not to be null, then ask for one more (which is out of
list bounds).
You should be missing one page each two anyway...
I guess the do-while version catches this with the tempFeed != null
tempFeed.getEntries() != null check.
Regards
Lorenzo
On Oct 26, 2:16 pm, doc123 doc.u...@gmail.com wrote:
Now I am using GDataI for Java and I tried following code to get Google
document list
DocumentListFeed tempFeed;
tempFeed = myService.getFeed(feedUrl, DocumentListFeed.class);
After I confirmed this code work without problem, I change code as
following to be able to feed more than one page entry, but this code
create Null pointer Exception.
DocumentListFeed tempFeed;
tempFeed = myService.getFeed(feedUrl, DocumentListFeed.class);
resultFeed.getEntries().addAll(tempFeed.getEntries());
while((tempFeed.getNextLink() != null)
(tempFeed.getEntries().size()0));
{
tempFeed = myService.getFeed(new
URL(tempFeed.getNextLink().getHref()),DocumentListFeed.class);
resultFeed.getEntries().addAll(tempFeed.getEntries());
}
I confirmed that “tempFeed.getNextLink()” is null. But this is a
condition to repeat while. I could not understand why this code fail
and I found suspicious info which related to Java while statement bug
in a following URL. Is this real bug?
http://java.decompiler.free.fr/?q=node/263after I get info, I changed
my code as following and confirmed this code works without error.
DocumentListFeed tempFeed = this.resultDocListFeed;
DocumentListFeed resultFeed = new DocumentListFeed();
boolean okToFeed = true;
do
{
if(tempFeed != null tempFeed.getEntries() != null)
{
if(tempFeed.getNextLink() != null tempFeed.getEntries().size()0)
{
tempFeed = this.docServiceClient.getFeed(new
URL(tempFeed.getNextLink().getHref()),DocumentListFeed.class);
resultFeed.getEntries().addAll(tempFeed.getEntries());
}
else
{
okToFeed = false;
}
}
else
{
okToFeed = false;
}
}while(okToFeed == true);
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[appengine-java] Re: Java while statement bug on GAE server?
Sorry to use specific sample code. So I tried more basic following code.
try
{
int i =0;
boolean tempFlag = false;
while(tempFlag == true);
{
i++;
out.println(tempFlag + i + := + tempFlag);
tempFlag = false;
}
}
catch(Exception e)
{
out.println(Error + e.toString());
}
what I got is tempFlag1:=false but out.print is within a
while(tempFlag == true) bock.
I think this is bug.
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[appengine-java] Re: Java while statement bug on GAE server?
Really looks like a bug. Test condition should fail without printing
anything, in fact.
Sorry for my misleading answer, and thanks for sharing this.
Lorenzo
On Oct 26, 5:22 pm, doc123 doc.u...@gmail.com wrote:
Sorry to use specific sample code. So I tried more basic following code.
try
{
int i =0;
boolean tempFlag = false;
while(tempFlag == true);
{
i++;
out.println(tempFlag + i + := + tempFlag);
tempFlag = false;
}
}
catch(Exception e)
{
out.println(Error + e.toString());
}
what I got is tempFlag1:=false but out.print is within a
while(tempFlag == true) bock.
I think this is bug.
--
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Google App Engine for Java group.
To post to this group, send email to google-appengine-j...@googlegroups.com.
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Re: [appengine-java] Re: Java while statement bug on GAE server?
Yes, it's a bug in your code:
while(tempFlag == true);
Note the semicolon. Try removing it.
On Tue, Oct 26, 2010 at 10:22 AM, doc123 doc.u...@gmail.com wrote:
Sorry to use specific sample code. So I tried more basic following code.
try
{
int i =0;
boolean tempFlag = false;
while(tempFlag == true);
{
i++;
out.println(tempFlag + i + := + tempFlag);
tempFlag = false;
}
}
catch(Exception e)
{
out.println(Error + e.toString());
}
what I got is tempFlag1:=false but out.print is within a while(tempFlag
== true) bock.
I think this is bug.
--
You received this message because you are subscribed to the Google Groups
Google App Engine for Java group.
To post to this group, send email to google-appengine-j...@googlegroups.com.
To unsubscribe from this group, send email to
google-appengine-java+unsubscr...@googlegroups.com.
For more options, visit this group at
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[appengine-java] Re: Java while statement bug on GAE server?
I need a good pair of glasses :-)
On Oct 26, 5:42 pm, Don Schwarz schwa...@google.com wrote:
Yes, it's a bug in your code:
while(tempFlag == true);
Note the semicolon. Try removing it.
On Tue, Oct 26, 2010 at 10:22 AM, doc123 doc.u...@gmail.com wrote:
Sorry to use specific sample code. So I tried more basic following code.
try
{
int i =0;
boolean tempFlag = false;
while(tempFlag == true);
{
i++;
out.println(tempFlag + i + := + tempFlag);
tempFlag = false;
}
}
catch(Exception e)
{
out.println(Error + e.toString());
}
what I got is tempFlag1:=false but out.print is within a while(tempFlag
== true) bock.
I think this is bug.
--
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Google App Engine for Java group.
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google-appengine-java+unsubscr...@googlegroups.com.
For more options, visit this group at
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