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modify text file java

haozhe heng answered on February 26, 2020 Popularity 8/10 Helpfulness 4/10

answer modify text file java

related edit a txt file using java

modify text file java

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import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
 
public class TextFileModificationProgram
{   
    static void modifyFile(String filePath, String oldString, String newString)
    {
        File fileToBeModified = new File(filePath);
         
        String oldContent = "";
         
        BufferedReader reader = null;
         
        FileWriter writer = null;
         
        try
        {
            reader = new BufferedReader(new FileReader(fileToBeModified));
             
            //Reading all the lines of input text file into oldContent
             
            String line = reader.readLine();
             
            while (line != null) 
            {
                oldContent = oldContent + line + System.lineSeparator();
                 
                line = reader.readLine();
            }
             
            //Replacing oldString with newString in the oldContent
             
            String newContent = oldContent.replaceAll(oldString, newString);
             
            //Rewriting the input text file with newContent
             
            writer = new FileWriter(fileToBeModified);
             
            writer.write(newContent);
        }
        catch (IOException e)
        {
            e.printStackTrace();
        }
        finally
        {
            try
            {
                //Closing the resources
                 
                reader.close();
                 
                writer.close();
            } 
            catch (IOException e) 
            {
                e.printStackTrace();
            }
        }
    }
     
    public static void main(String[] args)
    {
        modifyFile("C:/StudentFile.txt", "85", "95");
         
        System.out.println("done");
    }
}

Popularity 8/10 Helpfulness 4/10 Language java

Source: javaconceptoftheday.com

Tags: file java text

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Contributed on Sep 24 2022

haozhe heng

0 Answers Avg Quality 2/10

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edit a txt file using java

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FileWriter fw = new FileWriter ("file.txt", true);
PrintWriter pw = new PrintWriter (fw);
/*
filewriter creates the file that printwriter can edit.
*/

Popularity 9/10 Helpfulness 4/10 Language java

Source: Grepper

Tags: edit

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Contributed on Feb 26 2020

Jeffrey Huang

0 Answers Avg Quality 2/10

modify text file java

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modify text file java

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edit a txt file using java

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