In Java, textual data is edited and written with the BufferedWriter write stream. Unlike the BufferedInputStream data bit stream, you can directly write a string, char, or array to the .

 
import java.io.BufferedWriter; 
import java.io.File; 
import java.io.FileWriter; 
import java.io.IOException; 

public class ExampleBufferedWriter {
 public static void main(String[] args) {
 try {

 String content = "This is the content added to the file"; 

 File file = new File("test.txt"); 

 // create the file if it doesn't exist
 if (!file.exists()) {
 file.createNewFile(); 
 }

 FileWriter fw = new FileWriter(file.getAbsoluteFile()); 
 BufferedWriter bw = new BufferedWriter(fw); 
 bw.write(content); 
 bw.close(); 

 System.out.println("Editing complete!"); 

 } catch (IOException e) {
 e.printStackTrace(); 
 }
 }
}

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