Search A Word In A File In Java
Displaying search result for: find word from txt file in java Java - search/ find a word in a text file Hello, I would like to know how to find from a list of lets say 10 but could be more,. Txt files, how.); System.out.print('Enter word to find: '); String word=input.next Java search word from text file In this tutorial, you will learn how to search a word from text file and display data related to that word.
I have been struggling with this wordsearch project for a couple of days now, just trying to get the horizontal search working. It's meant to work in all 8 possible. I have been learning and stack one problem. I try to make searching specific name and employee number from text file. I tried to research the online around, but I did.
Here, we have.: '); String word=input.next; File f=new File('c:/student.txt stop word removal from text file i need java source code for stop word removal from a text file Shifting txt file to database Question Details: I want to shift data from txt file to Database. The data is written in the following text format. And put into database using Java/JSP. Database table is as below ID numeric Convesion of txt file to doc file.?????? How to convert text file to doc file using java file from one directory and writes an new one in cvs format in another one. I am.; /.this program reads files from inpath and writes them to outpath as a single txt. = new File(inpath);//files from the inpath File files = file.listFiles how to match the key word from a text file pHi all, I have the code to match the key word and from the text.
I have input like this reader.txt. Want to get the value from the called file and get the result. String regex1 Find Longest Word from the string using Java Here we are going to find the longest word from the string.
For this, we have specified the string which. And allow the longest word to display. Here is the code how to change file from. Txt to.mat(matrix) i have a big file.txt and i want to change this file to file.mat(matrix).this is in windows not on any os.thx if u answering quickly please How to select only.
Txt file to be zipped using java? Hello, i'm trying to zipp. Txt files from a folder but i want to know how to select only. Txt. public boolean accept( File dir, String name) return!name.startsWith('.
A simple technique that could well be considerably faster than indexOf is to use a Scanner, with the method findWithinHorizon. If you use a constructor that takes a File object, Scanner will internally make a FileChannel to read the file. And for matching it will end up using a for efficient string searching. If you don't have access to JDK 5 but you can use JDK 1.4, then you can use java.util.regex and FileChannel yourself, but it will be more complex. Reading the file in chunks (e.g. Into a CharBuffer) is a good idea, but you need to consider that it's possible that the target string may be split between reads.
If you know the maximum size of the target string (and if it's not a prohibitively large number), you can handle this by copying length-1 chars from the end of the last read to the beginning of the buffer for the next read. You'll have to be careful to get this right though. Simply reading the file line by line and searching each line individually (preferably using java.util.regex) may be acceptable, if you're certain that the target string does not contain any line separators.
Python Count A Word In A File
It will still most likely be slower than the other techniques suggested so far, because it will take more time to transfer each and every char into a char and then into String object. The nice thing about NIO classes is they allow most of that stuff to happen outside the JVM, and thanks to Boyer-Moore you don't really need to look at all the charcters anyway. But reading line by line does have the advantage of being a common idiom that most people understand.
If you can't use a Scanner and findWithinHorizon, then reading line by line will probably be simpler than anything else I've suggested. And simplicity is almost always a virtue in programming. June 19, 2006: Message edited by: Jim Yingst.
I understand the horizion parameter to be a limit set on the amount of data to search: public String findWithinHorizon(Pattern pattern,int horizon) Attempts to find the next occurrence of the specified pattern. A scanner will never search more than horizon code points beyond its current position.
If horizon is 0, then the horizon is ignored and this method continues to search through the input looking for the specified pattern without bound. It looks like your code should work. Hi all, I tried with doing a mini benchmarking exercise for comparing the performance of a searching a 1 gb text file using the method described here and also using String.indexOf. Trial was done for about 15 different Strings as search param. Using Regex and NIO:- 120 to 210 seconds Using indexOf:- 70 to 100 seconds As shown above, the results are not very encouraging and I find that in many cases, indexOf performed atleast 25% faster. Also another thing I noticed with the approach here is that the time taken varies widely depending on the String that is used to search, whereas it was more or less consistent when using indexOf method.
Hence I have doubt if using Regex patterns is the best way to search for plain strings in a large input. Please let me know your comments.
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I'd like to see the exact code you're using at this point. Is it the same code that was throwing OutOfMemoryError, or has it been further modified? Boyer-Moore definitely will be more advantageous the longer the target string is, as Stan said. It sounds like the strings you're looking for are short enough that it doesn't offer a great advantage.
Apc smart ups 2200 visio stencil s. Also I guess Scanner is such a generalized class, it's designed to be able to do so many different things, it's not necessarily optimized to be as fast as possible in all things. If you want to continue optimizing this stuff, it would probably be worthwhile to start using a profiler on the code to see what's really taking up most of the time. Guesswork has taken us this far, but real data would be preferable.