區別：
1. PrintWriter的print、println方法可以接受任意型別的引數，而BufferedWriter的write方法只能接受字元、字元陣列和字串；
2. PrintWriter的println方法自動新增換行，BufferedWriter需要顯示呼叫newLine方法；
3. PrintWriter的方法不會拋異常，若關心異常，需要呼叫checkError方法看是否有異常發生；
4. PrintWriter構造方法可指定引數，實現自動重新整理快取（autoflush）；
5. PrintWriter的構造方法更廣。
在網路TCP程式設計中，可以使用PrintWriter，也可以使用BufferedWriter，程式碼如下：
伺服器端：

package TCP;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.*;

public class MyTcp {
        private BufferedReader reader;
        private ServerSocket server;
        private Socket socket;
        void getserver(){
            try
 
 {
                server=new ServerSocket(8998);
                System.out.println("伺服器套接字已經建立成功");
                while(true)
                {
                    System.out.println("等待客戶機連線");
                    socket=server.accept();
                    reader=new BufferedReader(new InputStreamReader(socket.getInputStream()));
                    getClientMessage();
                }
            } catch
 
 (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }

        }
        private void getClientMessage() {
            // TODO Auto-generated method stub
            try {
            while(true)
            {

                    System.out.println("客戶機："+reader.readLine());

            }
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }

                try {
                    if(reader!=null)
                        reader.close();
                    if(socket!=null)
                        socket.close();
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
        }
        public static void main(String args[])
        {
            MyTcp tcp = new MyTcp();
            tcp.getserver();
        }
}

客戶端：

package 網路通訊客戶端;

import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.net.Socket;

import javax.swing.JFrame;
import javax.swing.JScrollBar;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import javax.swing.border.BevelBorder;

public class MyClient extends JFrame{
    private BufferedWriter writer;
    //private PrintWriter writer;
    Socket socket;
    private JTextArea ta = new JTextArea();
    private JTextField tf=new JTextField();
    Container cc;
    public MyClient(String title)
    {
        super(title);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        cc=this.getContentPane();
        final JScrollPane scrollPane=new JScrollPane();
        scrollPane.setBorder(new BevelBorder(BevelBorder.RAISED));
        getContentPane().add(scrollPane,BorderLayout.CENTER);
        scrollPane.setViewportView(ta);
        cc.add(tf,"South");
        tf.addActionListener(new ActionListener() {

            @Override
            public void actionPerformed(ActionEvent e) {
                // TODO Auto-generated method stub
                try {
                writer.write(tf.getText());
                writer.newLine();
                writer.flush();//使用BufferedWriter和PrintWriter都行，後者更方便,PrintWriter擁有跨平臺的換行符輸入，且自動重新整理。
                //writer.println(tf.getText);
                ta.append(tf.getText()+'\n');
                ta.setSelectionEnd(ta.getText().length());
                tf.setText("");
                } catch (IOException e1) {
                    // TODO Auto-generated catch block
                    e1.printStackTrace();
                }
            }
        });
    }
    private void connect(){
        ta.append("嘗試連線\n");
        try {
            socket = new Socket("127.0.0.1",8998);
            writer=new BufferedWriter(new OutputStreamWriter(socket.getOutputStream()));
            //writer=new PrintWriter(socket.getOutpuStream());
            ta.append("完成連線");
        } catch (Exception e) {
            // TODO: handle exception
        }
    }
    public static void main(String args[])
    {
        MyClient client = new MyClient("向伺服器傳送資料");
        client.setSize(200,200);
        client.setVisible(true);
        client.connect();

    }
}