--- a/src/main/java/alice/daemon/AliceDaemon.java	Sat Dec 30 20:33:06 2017 +0900
+++ b/src/main/java/alice/daemon/AliceDaemon.java	Sun Dec 31 01:08:52 2017 +0900
@@ -7,7 +7,7 @@
 import java.net.ServerSocket;
 import java.nio.channels.ServerSocketChannel;
 
-//import org.apache.log4j.Logger;
+import org.apache.log4j.Logger;
 //import org.apache.log4j.PatternLayout;
 //import org.apache.log4j.WriterAppender;
 
@@ -15,7 +15,7 @@
 
     private Config conf;
     private AcceptThread acceptThread;
-    //private Logger log = Logger.getLogger(AliceDaemon.class);
+    private Logger log = Logger.getLogger(AliceDaemon.class);
 
     public AliceDaemon(Config conf) {
         this.conf = conf;
@@ -50,7 +50,7 @@
             // listen on any address ipv4/ipv6
             InetSocketAddress a = new InetSocketAddress("::", conf.localPort);
 
-            System.out.println("AliceDaemon.listen: bind to " + a);
+            log.info("AliceDaemon.listen: bind to " + a);
             ss.bind(a);
             acceptThread = new AcceptThread(ss, "ACCEPT" + conf.localPort);
             acceptThread.start();