Rad sa datotekam u Javi POMAGAJTE

[ voxi @ 02.01.2006. 11:17 ] @

Moze li mi neko dati najjednostavniji primer upisa u txt datoteku i citanje iz nje ajd molim VAS treba mi to za zadatak.
HVALA.

_{[Ovu poruku je menjao veljaradenkovic dana 03.01.2006. u 00:48 GMT+1]}

[ nemnesic @ 02.01.2006. 17:59 ] @

Code:

import java.io.*;

public class MyFirstFileWritingApp
{
    // Main method
    public static void main (String args[])
    {
        // Stream to write file
        FileOutputStream fout;

        try
        {
            // Open an output stream
            fout = new FileOutputStream ("myfile.txt");

            // Print a line of text
            new PrintStream(fout).println ("hello world!");

            // Close our output stream
            fout.close();
        }
        // Catches any error conditions
        catch (IOException e)
        {
            System.err.println ("Unable to write to file");
            System.exit(-1);
        }
    }
}

Code:

import java.io.*;

public class MyFirstFileReadingApp
{
    // Main method
    public static void main (String args[])
    {
        // Stream to read file
        FileInputStream fin;

        try
        {
            // Open an input stream
            fin = new FileInputStream ("myfile.txt");

            // Read a line of text
            System.out.println( new DataInputStream(fin).readLine() );

            // Close our input stream
            fin.close();
        }
        // Catches any error conditions
        catch (IOException e)
        {
            System.err.println ("Unable to read from file");
            System.exit(-1);
        }
    }
}

let me know if it works

--
Every Problem Has A Solution

[ voxi @ 07.01.2006. 14:17 ] @

Hvala za ovo do sada. (Sa malim akasnjenjem) Ovo mi je dosta koristilo ali sada mi treba da ja odredjeni podatak u datoteci promenim kako to da uradim ajd dajte mi neki primer molim vas.

HVALA,
I SRETNI VAM SVI JANUARSKI PRAZNICI.

_{[Ovu poruku je menjao veljaradenkovic dana 07.01.2006. u 16:31 GMT+1]}

[ nemnesic @ 07.01.2006. 16:35 ] @

Hristos Se Rodi!
A jel znas kako bi ja to uradio? Ne...
e ovako...
jabi read ceo text u array (matrice, niz...ne znam kako ih zovete tamo ;))
onda bi trazio ono sto hocu da zamenim...i posle toga bi to
samenio...i onda bi ponovo Write text u taj isti text file...

primer nemogu sada da pisem...ali je na istom principu...read & write I/O files

cujemo se

nn

--
Every Problem Has A Solution

[ voxi @ 08.01.2006. 18:04 ] @

Nema problema ne ce se ponoviti veljaradenkovic!
De mi recite kako da ocitam sistemsko vreme i datum, ako moze kod po
mogucnosti.
Nemnesic sto se tice tvoj ideje ona je OK ali ima li drugi nacin
Hvala.

--
Internal Virus Database is out-of-date.
Checked by AVG Anti-Virus.
Version: 7.0.308 / Virus Database: 267.13.10 - Release Date: 29.11.2005

[ nemnesic @ 09.01.2006. 19:25 ] @

citanje vremena i datuma:

Code:

import java.text.*;
import java.util.*;

public class my_data {

private SimpleDateFormat formatter;
private Date currentdate;

  public my_data() {
   currentdate=new Date();
   formatter=new SimpleDateFormat("EEE MMM dd hh:mm:ss yyyy",
Locale.getDefault());
   }
  public int getDay() {
   formatter.applyPattern("d");
   return Integer.parseInt(formatter.format(currentdate));
  }
  public int getMonth() {
   formatter.applyPattern("M");
   return Integer.parseInt(formatter.format(currentdate));
  }
  public int getYear() {
   formatter.applyPattern("y");
   return Integer.parseInt(formatter.format(currentdate));
  }
  public int getHour() {
   formatter.applyPattern("h");
   return Integer.parseInt(formatter.format(currentdate));
  }
  public int getMinute() {
   formatter.applyPattern("m");
   return Integer.parseInt(formatter.format(currentdate));
  }
}

a zasto drugi nacin da menjas content file-a? mozda postoji ali daj mi
prvo taj text file koji hoces da menjas, i kazi mi sta hoces da
menjas...

nn

--
Every Problem Has A Solution

[ voxi @ 09.01.2006. 21:11 ] @

Hvala kolega za ovo citanje vremena!
A sto se tice proemene u datoteci necu da te gnajvim nije to los metod ali
razmisljao sam o tome da se to resi na soto manji racun operativne
memorije nije nista ekstra I ako uratim tako profa ce prihvatiti
U svako slucaju havala!

--
No virus found in this incoming message.
Checked by AVG Anti-Virus.
Version: 7.0.308 / Virus Database: 267.14.15 - Release Date: 6.1.2006

[ nemnesic @ 10.01.2006. 06:40 ] @

e pogledaj ovo

Code:

static String
replace( String str, String replace, String with )
{
   StringBuffer sb = null;
   String temp = str;
   boolean found = false;
   int start = 0;
   int stop  = 0;

   while( ( start = temp.indexOf( replace , stop )) != -1 )
   {
     found = true;
     stop = start + replace.length();
     sb = new StringBuffer( temp.length() + with.length() - replace.length() );
     sb.append( temp.substring( 0 , start ) );
     sb.append( with );
     sb.append( temp.substring( stop , temp.length() ));
     temp = sb.toString();
     stop += with.length() - replace.length();
   }

   if( ! found ){
    return str;
   }else{
    return sb.toString();
   }

}

[ nemnesic @ 10.01.2006. 06:48 ] @

e naso sam i ovo...malo razlicito

Code:

  public static String replace(String source, String pattern, String replace)
    {
        if (source!=null)
        {
        final int len = pattern.length();
        StringBuffer sb = new StringBuffer();
        int found = -1;
        int start = 0;

        while( (found = source.indexOf(pattern, start) ) != -1) {
            sb.append(source.substring(start, found));
            sb.append(replace);
            start = found + len;
        }

        sb.append(source.substring(start));

        return sb.toString();
        }
        else return "";
    }

[ voxi @ 10.01.2006. 19:06 ] @

Hvala kolega sad cu da vidim sta kaze ovaj kod!

--
No virus found in this incoming message.
Checked by AVG Anti-Virus.
Version: 7.0.308 / Virus Database: 267.14.15 - Release Date: 6.1.2006