Write each input of the console to a file and branch

For an interview, see Java I/O stream. Example is a lot to see, but what the master how, do not know. Tired of watching, I wrote this small program.

is to chat in console A with B, and then the Chat class capacity branch to write the file.

Import java.io.*;
Import Java.util.Scanner;
public class self{public
	static void Main (string[] args) {
		Scanner scanner=new Scanner (system.in);
		String self= "";
		int i=0;

		Try{file file=new File ("D:/self.txt");		Creates a Self.txt file while
			(true) {
				i++;
				if (i%2==1) {
					System.out.println ("A:");
					OutputStream out=new FileOutputStream (file,true);	Creates an output stream to file, calls this construct method, can write the contents of the console to the file
					self=scanner.nextline () each time;	Read the contents of the scanner, you must call the Nextline () method to read the one-time input, next () only recognize a word
					String self1= "A:" +self+ "\ r" + "\ n";	The back is for the branch
					byte[] Bytes=self1.getbytes ();
					Out.write (bytes);
					Out.close ();
				} else{
					System.out.println ("B:");
					OutputStream out=new FileOutputStream (file,true);
					Self=scanner.nextline ();
					String self2= "B:" +self+ "\ r" + "\ n";
					Byte[] B=self2.getbytes ();
					Out.write (b);
					Out.close ();}}
		catch (Exception e) {
			e.printstacktrace ();}}}

This is the effect chart