자바 인프런 - 간단한 채팅프로그램

클라이언트가 서버 소켓에 접속한 뒤 입력한 문장을 서버에서 입력 받는 간단한 채팅 프로그램 

-서버 소켓

import java.io.BufferedReader;

import java.io.InputStreamReader;

import java.io.PrintWriter;

import java.net.ServerSocket;

import java.net.Socket;

public class MakeServersocket {

ServerSocket serversocket = null;

Socket socket = null;

PrintWriter writer = null;

BufferedReader reader = null;

String lineStr;

public MakeServersocket() {

try {

serversocket = new ServerSocket(2000);

while (true) {

socket = serversocket.accept();

System.out.println("클라이언트 요청");

writer = new PrintWriter(socket.getOutputStream(), true);

reader = new BufferedReader(new InputStreamReader(socket.getInputStream()));

while ((lineStr = reader.readLine()) != null) {

writer.write(lineStr);

System.out.println("input:" + lineStr);

}

writer.close();

reader.close();

socket.close();

}

} catch (Exception e) {

}

}

public static void main(String[] args) {

new MakeServersocket();

}

}

-클라이언트 소켓

import java.io.BufferedReader;

import java.io.InputStreamReader;

import java.io.PrintWriter;

import java.net.Socket;

public class MakeClientsocket {

Socket socket = null;

PrintWriter writer = null;

BufferedReader reader = null;

public MakeClientsocket() {

try {

socket = new Socket("localhost", 2000);

writer = new PrintWriter(socket.getOutputStream(), true);

reader = new BufferedReader(new InputStreamReader(socket.getInputStream()));

String str = null;

BufferedReader sReader = new BufferedReader(new InputStreamReader(System.in));

while((str = sReader.readLine()) !=null) {

writer.println(str);

System.out.println("output:" + str);

}

writer.close();

reader.close();

sReader.close();

socket.close();

} catch (Exception e) {

}

}

public static void main(String[] args) {

new MakeClientsocket();

}

}