Replacing text in a file

[amoon]

Hi all,
i need some help, i have a file which contain names of proteins and i want to replace the names with numbers>for example i have name of protein
YNL240 ================
YL5c024===============
and so on,
what i need ,replace the name with number and it will look like
1==========
2==========
and so on
>>>>>>>>>>>>>>>>>
please if some can help the deadlines of HW is tomrrow at 12 pm
I will wait for reply
thanks

[JosAH]

Hi all,
i need some help, i have a file which contain names of proteins and i want to replace the names with numbers>for example i have name of protein
YNL240 ================
YL5c024===============
and so on,
what i need ,replace the name with number and it will look like
1==========
2==========
and so on
>>>>>>>>>>>>>>>>>
please if some can help the deadlines of HW is tomrrow at 12 pm
I will wait for reply
thanks

And where does the 'important' part come in?

kind regards,

Jos

[steinnes]

If I were you I'd look into regex. Using the Matcher class' replace methods you should be able to accomplish what you want. It is explained here:

http://java.sun.com/docs/books/tutor...sential/regex/

[amoon]

Dear Jos
I don't understand what you mean in your reply ?

i just want some hints how to do it .

[r035198x]

Dear Jos
I don't understand what you mean in your reply ?

i just want some hints how to do it .

Your thread title says (important). You should have chosen a thread title that best describes your problem. Everyone else's problem is just as important as yours. You can see the site guidelines for more details on this.
Why don't you just read the whole file into a StringBuilder, then do the replace there and write the contents back to the file.

Edit: I've now renamed your thread.