[SOLVED] Read From LOGFILE

[Mir]

Hi All

I have code which is working .But my problem is i want to Show from file one string only one time.

Example of logfile:-

123 kjhkjhlk
123 jhijio
234 fdfgd
989 nbnbnb
676 njnkj


Now i want ot show like this:-
123
234
989
676

So plz help me...

[sukatoa]

Here are some examples,

Code:

void ReadFile(File f) throws Exception {
      Scanner scan=new Scanner(f);
      while(scan.hasNext()){
            System.out.println(scan.next());
            scan.next();
      }scan.close();
}

or

Code:

void ReadFile(File f) throws Exception {
      Scanner scan=new Scanner(f);
      while(scan.hasNextLine()){
            System.out.println(scan.nextLine().split(" ")[0]);        
      }scan.close();
}

I haven't test it yet, try it....

[Mir]

i use both code in my programm.But out put is,It is printing may time.As i say i want to print only one time..

Plz help me

[Mir]

Plz help me any one

[Eranga]

Can you get all numbers, with duplicates.

[Mir]

Quote:

Originally Posted by Eranga

Can you get all numbers, with duplicates.

which type of number...my log file number like is

123
122
1233
145
165
789
122
122
123
122

[Eranga]

Ok, now what you can do is, store them in a list and add one by one. Before adding the element check it's exist or not.

[Mir]

can you give me code of store in list and add one by one

[Eranga]

Got you what I say there?

[Eranga]

Ok, here is a way to do it.

Code:

import java.io.File;
import java.io.FileNotFoundException;
import java.util.ArrayList;
import java.util.Scanner;

/**
 *
 * @author Eranga Tennakoon
 */
public class FileRead {
    
    private ArrayList<String> str;
    
    public FileRead() {
        this.str = new ArrayList<String>();
    }
    
    private void getFileInfor(File myFile) {
        try {
            Scanner fileScanner = new Scanner(myFile);
            while(fileScanner.hasNextLine()) {
                doProcessing(fileScanner.nextLine());
            }
        } 
        catch (FileNotFoundException ex) {
            System.out.println(ex.getMessage());
        }
        printResult();
    }
    
    private void doProcessing(String strr) {
        String newStr = strr.split(" ")[0];
        removeDuplicates(newStr);
    }
    
    private void removeDuplicates(String s) {
        
        if(str.isEmpty()) {
            str.add(s);
        }
        else {
            for(int i = 0; i < str.size(); i++) {
                if(!str.contains(s)) {
                    str.add(s);
                }
            }
        }
    }
    
    private void printResult() {
        for(int i = 0; i < str.size(); i++) {
            System.out.println(str.get(i));
        }
    }
    
    public static void main(String[] args) {
        File dd = new File("files/mir_001.txt");
        new FileRead().getFileInfor(dd);
    }
    
}

[Mir]

yaa i got it.it's good if it working..

[Eranga]

Try an let me know is it work.

[Mir]

it is not working accourding to you and me.It is simply print all string which is present in log file..

[Mir]

Thxs for code but it's out put like this

Code:

192.158.5.9	
192.158.5.9	
192.158.5.9
192.158.5.9	
192.158.5.9	
192.158.5.9	
192.158.5.9	
192.158.5.9	
192.158.5.9	
192.158.5.9	
192.158.5.9

And i want to show only one time

Code:

192.158.5.9

i mean all duplicate 192.158.5.9 don't want to show.

plz help me

[Eranga]

No you are wrong, it's perfectly work for me. I don't know what happened in your end.

[Eranga]

removeDuplicates() done it

[Mir]

plz see me log formate then try to run

[Eranga]

Are you talking about this.

Code:

192.158.5.9	
192.158.5.9	
192.158.5.9
192.158.5.9	
192.158.5.9	
192.158.5.9	
192.158.5.9	
192.158.5.9	
192.158.5.9	
192.158.5.9	
192.158.5.9

[Mir]

yes

Code:

192.158.5.9	kjnkjnkn
192.158.5.9	kasasdas
192.158.5.9          asdsad
192.158.5.9	sadasdsad
192.158.5.9	sadsad
192.158.5.9	rtertre
192.158.5.9	rtret
192.158.5.9	cbvv
192.158.5.9	cvbnghh
192.158.5.9	fghfgn
192.158.5.9          tyty

[Eranga]

Yep, you get all of them as output. Reason is this.

The way of formated you log file and the way it handle on the code is not compatible. On a single line, number split depend on a single character space.

Code:

String newStr = strr.split(" ")[0];

But in your log file there is no space. I can see tab, in some lines more than one tab. So what happened is all are counted as not duplicated on each.

So, you get the output as

Code:

192.158.5.9	kjnkjnkn
192.158.5.9	kasasdas
192.158.5.9          asdsad
192.158.5.9	sadasdsad
192.158.5.9	sadsad
192.158.5.9	rtertre
192.158.5.9	rtret
192.158.5.9	cbvv
192.158.5.9	cvbnghh
192.158.5.9	fghfgn
192.158.5.9          tyty

Because no one is similar to each other.