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how to search a word in a file

5 replies on 1 page. Most recent reply: Aug 15, 2003 7:09 AM by Greg Lehane

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aj3423 aj

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Nickname: aj3423
Registered: Aug, 2003

how to search a word in a file Posted: Aug 13, 2003 8:11 AM
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how can i get a charactor in a file one by one and compare it with "a" ?(not use readLine)


Greg Lehane

Posts: 33
Nickname: glehane
Registered: Jun, 2003

Re: how to search a word in a file Posted: Aug 13, 2003 11:36 AM
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The read() method in BuffereredReader reads a character at a time. It returns -1 when at the end of the stream/file.

=- Greg

aj3423 aj

Posts: 16
Nickname: aj3423
Registered: Aug, 2003

Re: how to search a word in a file Posted: Aug 13, 2003 5:40 PM
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all read() methods return "int", eg. character "A" will be turned to 65(its ascII),then how can i compare it with the charecter "a"?

Greg Lehane

Posts: 33
Nickname: glehane
Registered: Jun, 2003

Re: how to search a word in a file Posted: Aug 13, 2003 7:29 PM
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try using 'A' instead of "A"

=- Greg

aj3423 aj

Posts: 16
Nickname: aj3423
Registered: Aug, 2003

Re: how to search a word in a file Posted: Aug 15, 2003 1:56 AM
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then how can i check if a String "abcde" exists in a file ?

Greg Lehane

Posts: 33
Nickname: glehane
Registered: Jun, 2003

Re: how to search a word in a file Posted: Aug 15, 2003 7:09 AM
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Well that's different then isn't it. If you are using the jdk 1.4.x then you can use the rather powerful regular expression search package it comes with. Otherwise there is a package in the apache jakarta project.

Or you could write your own search mechanism. You would have to keep a buffer as you read the file. Be imaginative, look at the methods available to you in class String etc.

=- Greg

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