Input and output objects in Java IO streams

Input stream:

public  void inputDemo () throws IOException { 
　　// file name 
    String fileName = " D: \\ aaa.txt " ; 
　　// Create a file object by file name 
    File File = new new File (fileName);
　　
　　// Create a stream object input 

    / / new new a FileOutputStream (File); 
    the FileInputStream FIS = new new the FileInputStream (fileName); 

    // int C;
     // the while ((C = fis.read ())> 0) {
     //    of System.out.print ((char) C );
     // } 
　　// create a byte array byte [] = buf new new byte [ 2000
     ];
     Int len; 
　　// no content found returns -1, it is judged that there is no content. There are then output
     the while ((len = fis.read (buf))> 0 ) { 
        the System. OUT .println ( " New glass: " ); 
        . The System OUT .println ( new new String (buf)); 
    } 
　　// Close input stream 
    fis.close (); 
}

Output stream:

　　

public  void outputDemo () throws IOException { 
　　// create output target stream 
    a FileOutputStream fos = new new a FileOutputStream ( " D: \\ named bbb.txt " ); 
　　// create output stream through writing 
    the OutputStreamWriter Writer = new new the OutputStreamWriter (fos); 
　　// written by writing the contents of the stream 
    writer.Write ( " Hello, Output stream " ); 
    writer.Close (); 
}