I am new in java and now learning the File io . but i am very confused about the io as there are many objects to deal with it (FileReader, FileWriter, BufferedReader, BufferedWriter, FileInputStream, FileOutputStream ... and may be there are more).
I want to know that what is the most efficient process for File io(What should i use ?).i don't want any encoding. i want just processing text files. Any simple example code will be greatly helpful.
Thank you.
First important point to understand and remember:
Stream: sequence of bytes.
Reader/Writer: sequence of characters (Strings)
Don't mix them, don't translate for one to another if not necessary, and always specify the encoding.
Some quick recipes:
To read a file as a sequence of bytes (binary reading).
new FileInputStream(File f);
The same adding buffering:
new BufferedInputStream(new FileInputStream(File f));
To read a file as a sequence of characters (text reading).
new FileReader(File f); // ugly, dangerous, does not let us specify the encoding
new InputStreamReader(new FileInputStream(File f),Charset charset); // good, though verbose
To add line-oriented buffering (to read lines of text)
new BufferedReader( ... someReader ... );
To output/write is practically the same (output/writer)
Simple thumb of rule.
Text - Readers / Writers
Binary - InputStream / OutputStream
You can read more at Files
Reading
Following will allow you to read line by line
BufferedReader br = new BufferedReader(new FileReader(fileLocationTxt));
Writing
Following will allow you to write line by line/part by part
DataOutputStream ds = new DataOutputStream(new FileOutputStream(newLocation));
As for your question, there is no BEST option. Even in here, you can see we have to use 2 or more at once (look at the constructors. They accept other reader/writer or inputStream/outputStream.
The best option depends on what you really want to do
NIO. - Eng.Fouad