Regex to extract lines

[ISAIAH]

Hello,
I have some ideas in regular expressions but here I can not . I have a text file which I would get the lines starting with either FX. Y where X is any number (which can begin with zero) and Y a space or by . XY with X and Y have the same definition as above.
Here are the piece of code that is the problem:

while((ln = in.readLine())!=null){
                            if(Pattern.games("F [0-9] +\\."ln) | | Pattern.games("\\.[0-9]+"ln)){
                                out.write(+ Onln System.getProperty("ln.separator"));
                            }

With this code, all output files are empty. Thank you in advance for your help

[NetWorkInG]

Hello,
I see no space in your regular expressions, perhaps your problem came from there.
Note: You can replace [0-9] by \ d
by the following line in your code.

if(Pattern.games(F\\d +\\. "Line) | | Pattern.games("\\.\\d + "Line))

First replace this line in your code and then see if it works or not and if you are getting any error then post back with the error.

[Logan 2]

Hello,
Eve I had a similar kind of a problem, so i am interested in this thread, the solution you mentioned, i have tried it

Note: You can replace [0-9] by \ d
Code:

if(Pattern.games(F\\d +\\. "Line) | | Pattern.games("\\.\\d + "Line))

This line of the code does not work, thought thanks for the help.
I have tried something else here, just have a look

while((ln = in.readLine())!=null){
                            if(Pattern.games("^ F\\d +\\. "ln) | | Pattern.games("^\\.\\d + "ln)){
                                out.write(+ Onln System.getProperty("ln.separator"));
                            }
                        }

Any more help on this is highly appreciated. Thanks in advance.

[cyber-noob]

Hello,
In fact I just realize that you forgot to add ".*" at the end of the regular expression . Indeed, it was defined early in our regular expressions, not the full lines.

if(Pattern.games(F\\d +\\. .*"Line) | | Pattern.games("\\.\\d + .* "Line))

Just think once before you include this in your code.
F00.2 * atypical or mixed (G30.8 +)
and
Quote:
F00.9 * unspecified (G30.9 +)
correpondent does not pattern.

[ISAIAH]

Hello,
Here is my updated code, have a look at it and if you find any corrections in that to be made, then you can guide me.

public class Extraction {
    
    / ** Creates a new instance of extraction * /
    Public Extraction() {
    }
    Public static void hand(String[] args) {
        String ln;
        
        
        BufferedReader in;
        BufferedWriter out;
        for(int i =1; i <=10; i + +){
            try{
                in =new BufferedReader(new FileReader(". / sources / sourcei + +. txt "));
                try{
                    out =new BufferedWriter(new FileWriter(". / output / exiti + +. txt "));
                    try{
                        while((ln = in.readLine())!=null){
                            if(Pattern.games("^ F\\d +\\. .*"ln) | | Pattern.games("^\\.\\d + .* "ln) | | Pattern.games("^\\.\\d +\\* .*"ln)){
                                out.write(+ Onln System.getProperty("ln.separator"));
                            }
                        }
                        System.out.System.out.println("File"i + +"Done!");
                    } finally{
                        out.close();
                    }
                }finally{
                    in.close();
                }
            }catch(Exception ex){
                ex.printStackTrace();
            }
        }
        
    }
}

[GlassFish]

Hello,
No, the problem is with the regular expression, in fact it is specifically that X can be a decimal number (see your example) which was not included in the regular expressions given so far.
For example, first it gives something like

"^ F\\d + (\\.\\d +)? .* "

I hope you are understanding the thing here. If you have any more queries to ask in this then you can post here.