Re: Extracting strings from text files

From:

"Oliver Wong" <owong@castortech.com>

Newsgroups:

comp.lang.java.programmer

Date:

Mon, 28 Aug 2006 16:52:40 GMT

Message-ID:

<sbFIg.14658$Nz6.3527@edtnps82>

"poener" <poener@gmail.com> wrote in message
news:1156780552.954291.21570@75g2000cwc.googlegroups.com...

Oliver Wong schrieb:

"poener" <poener@gmail.com> wrote in message
news:1156777999.966460.224240@i42g2000cwa.googlegroups.com...

Hello again,

I want to to read lines from a text file and assign each column of each
line to a different variable, something like read -u FileHandler
STRING1 STRING2 ... STRINGN in bash... How could this be done when
programming with java?

For clarification, if your textfile has 80 columns and 1000 lines,
you'd
end up with 80000 variables. Is this correct?

Exactly.

In my application I have a file which acts as a lookup table with two
columns, indicating the id of a device and its address. My class
receives as arguments the device id(s) (one or several) and looks for
them in the lookup table, returning the device address(es).

Assuming the text file is small enough to fit in memory and that you're
using only characters in the basic multilingual plane (e.g. no Ancient
Sumerian characters), the way I'd do this is to read in every line as a
String and keep them in an array of Strings. Then, for each line, I'd use
the charat() method to extract the character at a specific column within
that line.

- Oliver