diff --git a/bin/j2/EchoServer.class b/bin/j2/EchoServer.class
index de737ca..21addfc 100644
--- a/bin/j2/EchoServer.class
+++ b/bin/j2/EchoServer.class
Binary files differ
diff --git a/src/j2/EchoServer.java b/src/j2/EchoServer.java
index 4ddfbec..baa763e 100644
--- a/src/j2/EchoServer.java
+++ b/src/j2/EchoServer.java
@@ -8,6 +8,7 @@
 import java.net.Socket;
 
 public class EchoServer {
+	@SuppressWarnings("resource")
 	public static void main(String args[]) {
 		// ソケットや入出力用のストリームの宣言
 		ServerSocket echoServer = null;
diff --git a/src/j2/ThreadEchoClient.java b/src/j2/ThreadEchoClient.java
index 90387ae..6c079e5 100644
--- a/src/j2/ThreadEchoClient.java
+++ b/src/j2/ThreadEchoClient.java
@@ -6,12 +6,39 @@
 import java.io.InputStreamReader;
 import java.net.Socket;
 import java.net.UnknownHostException;
-public class ThreadEchoClient {
+public class ThreadEchoClient implements Runnable {
+	BufferedReader isbr = null;
+	Thread thread = null;
+	public ThreadEchoClient(Socket socket) {
+		try {
+			isbr = new BufferedReader(new InputStreamReader(socket.getInputStream()));
+		} catch (IOException e) {
+			e.printStackTrace();
+		}
+		thread = new Thread(this);
+		thread.start();
+	}
+	
+	@Override
+	public void run() {
+		// サーバーからのメッセージを受け取り画面に表示します
+		String line;
+		try {
+			while ((line = isbr.readLine()) != null) {
+				System.out.println("Server: " + line);
+				if (line.equals("quit")) break;
+			}
+		} catch (IOException e) {
+			e.printStackTrace();
+		} finally {
+			System.exit(0);
+		}
+	}
+
 	public static void main(String[] args) {
 		// ソケットや入出力用のストリームの宣言
 		Socket socket = null;
 		DataOutputStream dos = null;
-		BufferedReader isbr = null;
 		BufferedReader stdinbr = null;
 
 		// ポート9999番を開く
@@ -19,7 +46,6 @@
 		try {
 			socket = new Socket(host, 9999);
 			dos = new DataOutputStream(socket.getOutputStream());
-			isbr = new BufferedReader(new InputStreamReader(socket.getInputStream()));
 			stdinbr = new BufferedReader(new InputStreamReader(System.in));
 		} catch (UnknownHostException e) {
 			System.err.println("Don't know about host: "+host);
@@ -28,25 +54,22 @@
 		}
 
 		// サーバーにメッセージを送る
-		if (socket != null && dos != null && isbr != null) {
+		if (socket != null && dos != null ) {
+			new ThreadEchoClient(socket);
 			try {
 				// メッセージを送ります
 				dos.writeBytes("HELLO\n");
 
 				// サーバーからのメッセージを受け取り画面に表示します
-				String line;
-				while ((line = isbr.readLine()) != null) {
-					System.out.println("Server: " + line);
-					if (line.equals("quit")) break;
+				while (true) {
 					String s = stdinbr.readLine();
 					System.out.println(s);
 					dos.writeBytes(s+"\n");
 				}
 
 				// 開いたソケットなどをクローズ
-				dos.close();
-				isbr.close();
-				socket.close();
+//				dos.close();
+//				socket.close();
 			} catch (UnknownHostException e) {
 				System.err.println("Trying to connect to unknown host: " + e);
 			} catch (IOException e) {
@@ -54,4 +77,5 @@
 			}
 		}
 	}
+
 }
\ No newline at end of file
diff --git a/src/j2/ThreadEchoServer.java b/src/j2/ThreadEchoServer.java
index 66467fe..f44ae24 100644
--- a/src/j2/ThreadEchoServer.java
+++ b/src/j2/ThreadEchoServer.java
@@ -39,6 +39,7 @@
 			System.out.println("disconnected "+sock.toString());
 		}
 	}
+	@SuppressWarnings("resource")
 	public static void main(String args[]) {
 		// ソケットの宣言
 		ServerSocket echoServer = null;