Java InputStream, OutputStream, reader and writer comparisons

There are several ways to read and write files in Java, where the following comparisons are made by code.

Comparison one: FileWriter and FileReader

 Public classMyCode1 { Public Static voidMain (string[] args) throws IOException {File F=NewFile ("My.txt"); FileWriter FW=NewFileWriter (f); Fw.write ("HELLO");                      Fw.close (); FileReader FR=NewFileReader (f); System. out. println (Char) Fr.read ());                  Fr.close (); }}

Output: H

Visible, FileWriter can be written in batches, but FileReader can only read one character at a time.

Comparison II:outputstream and InputStream

 Public classMyCode1 { Public Static voidMain (string[] args)throwsIOException {File f=NewFile ("My.txt"); Char[] data =New Char[]{' H ', ' E ', ' l ', ' l ', ' O '}; OutputStream OS=NewFileOutputStream (f); Os.write (data[0]);                      Os.close (); InputStream is=NewFileInputStream (f); System.out.println ((Char) Is.read ());                  Is.close (); }}

Output: H

Visible,outputstream and InputStream can read and write only one character at a time .

Comparison three:outputstreamwriter and inputstreamreader

 Public classMyCode1 { Public Static voidMain (string[] args)throwsIOException {File f=NewFile ("My.txt"); OutputStream OS=NewFileOutputStream (f); OutputStreamWriter OSW=Newoutputstreamwriter (OS); Osw.write ("HELLO");           Osw.close ();                      Os.close (); InputStream is=NewFileInputStream (f); InputStreamReader ISR=NewInputStreamReader (IS); System.out.println ((Char) Isr.read ());           Isr.close ();                  Is.close (); }}

Output: H

Visible,outputstreamwriter can be written in batches, but InputStreamReader can only read one character at a time. Effects with FileWriter and FileReader.

Comparison four:bufferedwriter and bufferedreader

 Public classMyCode1 { Public Static voidMain (string[] args)throwsIOException {File f=NewFile ("My.txt"); OutputStream OS=NewFileOutputStream (f); OutputStreamWriter OSW=Newoutputstreamwriter (OS); BufferedWriter BW=NewBufferedWriter (OSW); Bw.write ("HELLO");           Bw.close ();           Osw.close ();                      Os.close (); InputStream is=NewFileInputStream (f); InputStreamReader ISR=NewInputStreamReader (IS); BufferedReader BR=NewBufferedReader (ISR);           System.out.println (Br.readline ());           Isr.close ();                  Is.close (); }}

Output: HELLO

Visible,bufferedwriter and BufferedReader can be read and written in bulk .

Java InputStream, OutputStream, reader and writer comparisons