FileWriter, BufferedWriter, Files and FileOutputStream can be used to write file.
- FileWriter: FileWriter is the simplest way to write a file in java, it provides overloaded write method to write int, byte array and String to the File. You can also write part of the String or byte array using FileWriter. FileWriter writes directly into Files and should be used only when number of writes are less.
- BufferedWriter: BufferedWriter is almost similar to FileWriter but it uses internal buffer to write data into File. So if the number of write operations are more, the actual IO operations are less and performance is better. You should use BufferedWriter when number of write operations are more.
- FileOutputStream: FileWriter and BufferedWriter are meant to write text to the file but when you need raw stream data to be written into file, you should use FileOutputStream to write file in java.
- Files: This utility class can write a file using it’s write function, internally it’s using OutputStream to write byte array into file.