Write to a file in Java - Sample Program

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This sample Java program demonstrates how to write to a file in Java. For this, the following two classes FileWriter and BufferedWriter are used. This program can be used to write to any text file using a Java Program.

FileWriter

The FileWriter is a class used for writing character files. The constructors of this class assume that the default character encoding and the default byte-buffer size are acceptable. To specify these values yourself, construct an OutputStreamWriter on a FileOutputStream.

BufferedWriter

The BufferWriter class is used to write text to a character-output stream, buffering characters so as to provide for the efficient writing of single characters, arrays, and strings.

import java.io.*;
class FileWrite 
{
   public static void main(String args[])
  {
      try{
    // Create file 
    FileWriter fstream = new FileWriter("out.txt");
        BufferedWriter out = new BufferedWriter(fstream);
    out.write("Hello Java");
    //Close the output stream
    out.close();
    }catch (Exception e){//Catch exception if any
      System.err.println("Error: " + e.getMessage());
    }
  }
}

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Comments(2)


1. View Comment

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

public class FileExists {
public static void main(String[] s) {
Scanner scanner = new Scanner(System.in);
System.out.print("Enter the url of a file: ");
System.out.flush();
String filename = scanner.nextLine();
File file = new File(filename);
if(file.exists()){System.out.println("exists");}
else{System.out.println("not exists");}
}
}


output1:
Enter the url of a file: C:\Users\298564\Desktop\sa.txt
exists

output2:
Enter the url of a file: C:\Users\298564\Desktop\asdfs.txt
not exists


View Tutorial          By: sa at 2012-08-02 07:09:30
2. View Comment

You know what will be usefull if we can use this in a java command line console to like when complie and run we can go ahead and write to it because when can just go ahead then write up a file of choce it just defeats the purpose f haing to write the code anyway!

View Tutorial          By: mechkid at 2012-12-03 14:54:41

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