--- a/src/main/java/jp/ac/u_ryukyu/treevnc/FindRoot.java	Wed Feb 20 23:04:41 2019 +0900
+++ b/src/main/java/jp/ac/u_ryukyu/treevnc/FindRoot.java	Thu Feb 21 16:52:21 2019 +0900
@@ -38,11 +38,6 @@
         }
     }
 
-    public FindRoot(int port, MulticastSocket soc) {
-		this.port = port;
-		this.soc = soc;
-	}
-
     /**
      * send find root message.
      * 
@@ -77,25 +72,6 @@
 		soc.close();
 	}
 
-	public void multicastUpdateRectangle(ByteBuffer buf) {
 
-		try {
-			DatagramPacket sendPacket = new DatagramPacket(buf.array
-					(), buf.limit(), InetAddress.getByName(TreeRootFinderListener.Ipv6McastAddr), ConnectionParams.DEFAULT_VNC_ROOT_FINDER);
-			soc.send(sendPacket);
-		} catch (IOException e) {
-			System.out.println("cannot send UpdateRectangle.");
-			e.printStackTrace();
-		}
-
-		try {
-			DatagramPacket sendPacket1 = new DatagramPacket(buf.array(), buf.limit(), InetAddress.getByName(TreeRootFinderListener.Ipv4McastAddr), ConnectionParams.DEFAULT_VNC_ROOT_FINDER);
-			soc.send(sendPacket1);
-		} catch (IOException e) {
-			System.out.println("cannot send UpdateRectangle.");
-			e.printStackTrace();
-		}
-		soc.close();
-	}
 
 }