I/O class includes node stream class and packaged stream class

Reader and Writer are the abstract base classes of all the character stream classes. They are used to simplify the input and output programming of strings, that is, to read and write text data.

Instance:

[Java]
Import java. io .*;
Www.2cto.com
Public class FileReaderWriterTest {
Public static void main (String [] args ){
Try {
FileWriter writer = new FileWriter ("hello.txt ");

Writer. write ("love_snooker ");

Writer. close ();

FileReader reader = new FileReader ("hello.txt ");

Char [] buf = new char [12];

Int len = reader. read (buf );

System. out. println (new String (buf, 0, len ));
} Catch (Exception e ){
E. printStackTrace ();
}
}
}

For usage of other functions, see the jdk help documentation.