How to write to file in Java using BufferedWriter

by Chaitanya Singh

in Java I/O

Earlier we discussed how to write to a file using FileOutputStream. In this tutorial we will see how to write to a file using BufferedWriter. We will be using write() method of BufferedWriter to write the text into a file. The advantage of using BufferedWriter is that it writes text to a character-output stream, buffering characters so as to provide for the efficient writing (better performance) of single characters, arrays, and strings.

Complete example: Write to file using BufferedWriter

In this example we have a String mycontent and a file myfile.txt in C drive. We are writing the String to the File with the help of FileWriter and BufferedWriter.

package beginnersbook.com;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;

public class WriteFileDemo {
   public static void main(String[] args) {
      BufferedWriter bw = null;
      try {
	 String mycontent = "This String would be written" +
	    " to the specified File";
         //Specify the file name and path here
	 File file = new File("C:/myfile.txt");

	 /* This logic will make sure that the file 
	  * gets created if it is not present at the
	  * specified location*/
	  if (!file.exists()) {
	     file.createNewFile();
	  }

	  FileWriter fw = new FileWriter(file);
	  bw = new BufferedWriter(fw);
	  bw.write(mycontent);
          System.out.println("File written Successfully");

      } catch (IOException ioe) {
	   ioe.printStackTrace();
	}
	finally
	{ 
	   try{
	      if(bw!=null)
		 bw.close();
	   }catch(Exception ex){
	       System.out.println("Error in closing the BufferedWriter"+ex);
	    }
	}
   }
}

Output:

File written Successfully

References:

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