--- a/src/main/java/jp/ac/u_ryukyu/treevnc/TreeVncRootSelectionPanel.java	Fri Jun 10 19:58:59 2016 +0900
+++ b/src/main/java/jp/ac/u_ryukyu/treevnc/TreeVncRootSelectionPanel.java	Sat Jun 11 22:42:58 2016 +0900
@@ -1,12 +1,13 @@
 package jp.ac.u_ryukyu.treevnc;
 
-import javax.swing.*;
-
 import com.glavsoft.viewer.swing.ConnectionParams;
 
+import javax.swing.*;
 import java.awt.*;
-import java.awt.event.*;
-import java.io.IOException;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+import java.awt.event.ItemEvent;
+import java.awt.event.ItemListener;
 
 public class TreeVncRootSelectionPanel extends JFrame implements ActionListener,
 		ItemListener {
@@ -24,7 +25,6 @@
 	private double width = 750;
 	private double height = 500;
 	private JLabel label;
-	private boolean flag;
 	private int counter = 0;
 	// private JCheckBox[] check = new JCheckBox[20];
 	private Checkbox[] check = new Checkbox[20];
@@ -87,6 +87,10 @@
 		contentPane.add(label, BorderLayout.SOUTH);
 	}
 
+    /**
+     * add tree vnc server selection
+     * @param str
+     */
 	public void checkBox(String str) {
 		if (counter == 0)
 			check[counter] = new Checkbox(str, true, ch);
@@ -105,16 +109,6 @@
 		contentPane.add(panel, BorderLayout.CENTER);
 	}
 
-	public String getAddressOption() {
-		while (!(flag)) {
-			try {
-				Thread.sleep(500);
-			} catch (InterruptedException e) {
-				e.printStackTrace();
-			}
-		}
-		return t1.getText();
-	}
 
 	public String getPortOption() {
 		return t2.getText();
@@ -126,7 +120,6 @@
 
 	public void actionPerformed(ActionEvent e) {
 		if (advancedMenu.getSelectedIndex() == 0) {
-			flag = true;
 			for (int t = 0; t < counter; t++) {
 				int ipv4AddressLength = 3;
 				int ipv6AddressLength = 17;
@@ -134,7 +127,7 @@
 				String hostAddress = null;
 				String rootAddress = null;
 				if (check[t].getState()) {
-					System.out.println(check[t].getLabel());
+					// System.out.println("Root Seletion Panel get the address : "+e+" "+check[t].getLabel());
 					String str = check[t].getLabel();
 					String[] temp = str.split(":");
 					if (temp.length == ipv4AddressLength) {