求指导！！一个简单的java Socket程序

[baoyongzhang94]

求指导！！为什么发送必须要加换行啊，不加就发送不过去，请看源码注释那一块，不用BufferWriter用PirntWriter也是一样，为什么print就不行，println就行啊！！！
客户端

package com.socket;
import java.net.*;
import java.io.*;

public class TalkClientTest {
	public static void main(String[] args){
		Socket s=null;
		BufferedReader br=null;
		BufferedWriter bw=null;
		BufferedReader bin=null;
		String line;
		try{
			s=new Socket("127.0.0.1",6666);
		}
		catch(UnknownHostException e){
			System.out.println("IP Error!");
		}
		catch(IOException e){
			System.out.println("IO Error!");
		}
		try{
			bin=new BufferedReader(new InputStreamReader(System.in));
			bw=new BufferedWriter(new OutputStreamWriter(s.getOutputStream()));
			br=new BufferedReader(new InputStreamReader(s.getInputStream()));
			while(true){
				line=bin.readLine();
				if(line.equals("exit")){
					break;
				}
				bw.write(line);
				bw.newLine();//为什么不打换行就不行啊，发送不过去
				bw.flush();
				System.out.println("Client:"+line);
				System.out.println("Server:"+br.readLine());
			}
			br.close();
			bw.close();
			bin.close();
			s.close();
		}
		catch(IOException e){
			System.out.println("IO Error!");
			e.printStackTrace();
		}
	}
}

服务器

package com.socket;
import java.net.*;
import java.io.*;

public class TalkServerTest {
	public static void main(String[] args){
		ServerSocket ss=null;
		Socket s=null;
		BufferedReader br=null;
		BufferedWriter bw=null;
		BufferedReader bin=null;
		String line=null;
		try{
			ss=new ServerSocket(6666);
			s=ss.accept();
		}
		catch(IOException e){
			System.out.println("IO Error!");
		}
		try{
			br=new BufferedReader(new InputStreamReader(s.getInputStream()));
			bw=new BufferedWriter(new OutputStreamWriter(s.getOutputStream()));
			bin=new BufferedReader(new InputStreamReader(System.in));
			while(true){
				System.out.println("Client:"+br.readLine());
				line=bin.readLine();
				if(line.equals("exit")){
					break;
				}
				bw.write(line);
				bw.newLine();//为什么不打换行就不行啊，发送不过去
				bw.flush();
			}
			bin.close();
			bw.close();
			br.close();
			s.close();
			ss.close();
		}
		catch(IOException e){
			System.out.println("IO Error!");
		}
	}
}

[Cactus_hxk]

不是发送不出去，line=bin.readLine();找到换行他才认为是一行，如果他没有找到他会一直的读下去，直到找到换行才会停止

[什么都不能]

发送玩一次后面要加\n\0吧