diff --git a/src/j2/EchoClient.java b/src/j2/EchoClient.java
index 67f5782..81ca094 100644
--- a/src/j2/EchoClient.java
+++ b/src/j2/EchoClient.java
@@ -9,16 +9,19 @@
 public class EchoClient {
     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 echoSocket = null;
-        DataOutputStream os = null;
-        BufferedReader is = null;
+        Socket socket = null;
+        DataOutputStream dos = null;
+        BufferedReader isbr = null;
+		BufferedReader inputbr = null;
+		BufferedReader stdinbr = null;
         
         // ポート9999番を開く
     	String host = "localhost";
         try {
-            echoSocket = new Socket(host, 9999);
-            os = new DataOutputStream(echoSocket.getOutputStream());
-            is = new BufferedReader(new InputStreamReader(echoSocket.getInputStream()));
+            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);
         } catch (IOException e) {
@@ -26,26 +29,29 @@
         }
 
         // サーバーにメッセージを送る
-        if (echoSocket != null && os != null && is != null) {
+        if (socket != null && dos != null && isbr != null) {
             try {
                 // メッセージを送ります
-                os.writeBytes("HELLO\n");
+                dos.writeBytes("HELLO\n");
                 for(String a: args) {
-                	os.writeBytes(a+"\n");
+                	dos.writeBytes(a+"\n");
                 }
-//                os.flush();
 
                 // 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 = is.readLine()) != null) {
+                while ((line = isbr.readLine()) != null) {
                     System.out.println("Server: " + line);
                     if (line.equals("quit")) break;
+                    
+                    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
-                os.close();
-                is.close();
-                echoSocket.close();
+                dos.close();
+                isbr.close();
+                socket.close();
             } catch (UnknownHostException e) {
                 System.err.println("Trying to connect to unknown host: " + e);
             } catch (IOException e) {
diff --git a/src/j2/ThreadEchoClient.java b/src/j2/ThreadEchoClient.java
index ccf9e2a..90387ae 100644
--- a/src/j2/ThreadEchoClient.java
+++ b/src/j2/ThreadEchoClient.java
@@ -9,18 +9,18 @@
 public class ThreadEchoClient {
 	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 echoSocket = null;
-		DataOutputStream os = null;
-		BufferedReader is = null;
-		BufferedReader inputbr = null;
+		Socket socket = null;
+		DataOutputStream dos = null;
+		BufferedReader isbr = null;
+		BufferedReader stdinbr = null;
 
 		// ポート9999番を開く
 		String host = "localhost";
 		try {
-			echoSocket = new Socket(host, 9999);
-			os = new DataOutputStream(echoSocket.getOutputStream());
-			is = new BufferedReader(new InputStreamReader(echoSocket.getInputStream()));
-			inputbr = new BufferedReader(new InputStreamReader(System.in));
+			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);
 		} catch (IOException e) {
@@ -28,25 +28,25 @@
 		}
 
 		// サーバーにメッセージを送る
-		if (echoSocket != null && os != null && is != null) {
+		if (socket != null && dos != null && isbr != null) {
 			try {
 				// メッセージを送ります
-				os.writeBytes("HELLO\n");
+				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 = is.readLine()) != null) {
+				while ((line = isbr.readLine()) != null) {
 					System.out.println("Server: " + line);
 					if (line.equals("quit")) break;
-					String s = inputbr.readLine();
+					String s = stdinbr.readLine();
 					System.out.println(s);
-					os.writeBytes(s+"\n");
+					dos.writeBytes(s+"\n");
 				}
 
 				// 開いたソケットなどをクローズ
-				os.close();
-				is.close();
-				echoSocket.close();
+				dos.close();
+				isbr.close();
+				socket.close();
 			} catch (UnknownHostException e) {
 				System.err.println("Trying to connect to unknown host: " + e);
 			} catch (IOException e) {