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problem with file

 
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problem with file, file problem
dato.java
17 Feb, 2008 - 03:59 AM
Post #1

New D.I.C Head
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Joined: 13 Feb, 2008
Posts: 30
here is code:
CODE

import java.io.*;

public class Main {
    public static void main(String[] args) throws IOException {
        try {
            File f = new File("JAVA.txt");
            FileWriter fw = new FileWriter(f);
            fw.write('a');
            fw.write('b');
            fw.write('c');
            fw.close();
            
        } catch (IOException ex) {
            ex.printStackTrace();
        }

    }
}
~edit: code tags PB
what i have to do/write in this code if i want to remove from file symbol a?
if anyone know , please help me,thanks

This post has been edited by PennyBoki: 17 Feb, 2008 - 04:09 AM
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1lacca
RE: Problem With File
17 Feb, 2008 - 04:17 AM
Post #2

code.rascal
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Joined: 11 Aug, 2005
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You are writing a file here, so the easiest way to remove it is not to write it into it. So delete the line: fw.write('a');
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dato.java
RE: Problem With File
17 Feb, 2008 - 06:05 AM
Post #3

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Joined: 13 Feb, 2008
Posts: 30
here is
code:
CODE

import java.io.*;

public class Main {
    public static void main(String[] args) throws IOException {
        try {
            
            FileReader fr = new FileReader("C:\\java.txt");
            int a;
         while((a=fr.read())!=-1) {
              System.out.println((char)a);
}
            
        } catch (IOException ex) {
            ex.printStackTrace();
        }

    }
}

what i have to add/change in this code if i want to remove some elements from this file?
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GWatt
RE: Problem With File
17 Feb, 2008 - 06:49 AM
Post #4

human inside
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You could read the file into a String object, and then use .substring() to cut out the chunks you don't want. Or use "+=" to add stuff.
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1lacca
RE: Problem With File
17 Feb, 2008 - 08:02 AM
Post #5

code.rascal
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String.replaceAll

Please don't start several topics for the same question, and use code tags to show your code. code.gif
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