CODEWITHSUNDEEP
javaset
Shyam Sunder
Shyam Sunder

Reputation: 3

write console data output to a text file

The below program is done by me. If data was given as input, it will store in set display on console and write data to a text file. Please give some solution in text file. It is printing garbage values. I want the output to be printed as it looks in console.

public class Test {
    public static void main(String []args) throws Exception {
        Set storeVals = new HashSet();
        Scanner sc = new Scanner(System.in);
        String input = "";

        do{
            System.out.println("Enter Some Data: ");
            input = sc.nextLine();
            storeVals.add(input);
        } while(!input.equals("exit"));
        //sc.close();

        Iterator storeValsItr = storeVals.iterator();
        while (storeValsItr.hasNext()) {
            System.out.println(storeValsItr.next());
        }

        ObjectOutputStream wr= new ObjectOutputStream(new FileOutputStream("D:/new.txt"));
        while (storeValsItr.hasNext()) {
            Object o=storeValsItr.next();
            wr.writeObject(o);
            wr.flush();
            wr.close();
        }
    }
}

Upvotes: 0

Views: 857

Answers (3)

Khushi Vansh
Khushi Vansh

Reputation: 11

package com.krv;

import java.io.BufferedWriter;
import java.io.FileWriter;
import java.io.IOException;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Scanner;
import java.util.Set;

public class TextWriter {

private static final String FILENAME = "D:/KRV/output/new.txt";

@SuppressWarnings("rawtypes")
public static void main(String[] args) {
    Set storeVals = new HashSet();
    Scanner sc = new Scanner(System.in);
    String input = "";
    BufferedWriter bw = null;
    FileWriter fw = null;
    do {
        System.out.println("Enter Some Data: ");
        input = sc.nextLine();
        storeVals.add(input);
    } while (!input.equals("exit"));
    try {
        fw = new FileWriter(FILENAME);
        bw = new BufferedWriter(fw);
        Iterator storeValsItr = storeVals.iterator();
        while (storeValsItr.hasNext()) {

            bw.write((String) storeValsItr.next());
            bw.newLine();
        }

        System.out.println("Done");

    } catch (IOException e) {

        e.printStackTrace();

    } finally {

        try {

            if (bw != null)
                bw.close();

            if (fw != null)
                fw.close();

        } catch (IOException ex) {

            ex.printStackTrace();

        }

    }

  }
}

Upvotes: 1

alejandrogiron
alejandrogiron

Reputation: 544

The reason you are getting a file filled with garbage is because you are writing Object to it, and not actual strings, resulting in a binary file. To fix this problem, in the bottom of your your program, consider using a BufferedWriter object instead.

BufferedWriter output = new BufferedWriter(new FileWrite(<yourfilename>));
while (storeValsItr.hasNext())
{
    output.write(storeValItr.next()+"\n");
}
output.close();

BufferedWriter documentation: https://docs.oracle.com/javase/7/docs/api/java/io/BufferedWriter.html

Upvotes: 0

Harmlezz
Harmlezz

Reputation: 8058

As of the JavaDoc:

FileOutputStream is meant for writing streams of raw bytes such as image data. For writing streams of characters, consider using FileWriter.

Use FileWriter together with BufferedWriter instead.

Upvotes: 0

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