diff --git a/demos/client/MobileIMSDKDemo-Java.jar b/demos/client/MobileIMSDKDemo-Java.jar
index 466a0773..e2953922 100755
Binary files a/demos/client/MobileIMSDKDemo-Java.jar and b/demos/client/MobileIMSDKDemo-Java.jar differ
diff --git a/release_notes/release_note_v3.0b20170713.txt b/release_notes/release_note_v3.0b20170713.txt
index 72cb9504..a011c487 100755
--- a/release_notes/release_note_v3.0b20170713.txt
+++ b/release_notes/release_note_v3.0b20170713.txt
@@ -1,5 +1,5 @@
 
--------------------------------------------------------------------------------------- v3.0发布于2017-06-25 19:08
+-------------------------------------------------------------------------------------- v3.0b20170713发布于2017-07-13 19:08
 MobileIMSDK v3.0b20170713版更新说明：
 【解决的Bug】
 1. [Android、java、iOS]解决了Demo代码中在不退出APP的情况下退出登陆后再重新登陆时，会报code=203错误的bug。
diff --git a/release_notes/release_note_v3.0b20170718.txt b/release_notes/release_note_v3.0b20170718.txt
new file mode 100755
index 00000000..5c46e176
--- /dev/null
+++ b/release_notes/release_note_v3.0b20170718.txt
@@ -0,0 +1,10 @@
+
+-------------------------------------------------------------------------------------- v3.0b20170718发布于2017-07-18 22:11
+MobileIMSDK v3.0b20170718版更新说明：
+【解决的Bug】
+1. [java]解决了Java客户端Demo从登陆界面进入主界面时偶尔卡死的问题。
+
+
+
+
+
diff --git a/src_all/demos/MobileIMSDK4jDemoX/src/net/openmob/mobileimsdk/java/demo/Launch.java b/src_all/demos/MobileIMSDK4jDemoX/src/net/openmob/mobileimsdk/java/demo/Launch.java
index f636dcee..92597d27 100755
--- a/src_all/demos/MobileIMSDK4jDemoX/src/net/openmob/mobileimsdk/java/demo/Launch.java
+++ b/src_all/demos/MobileIMSDK4jDemoX/src/net/openmob/mobileimsdk/java/demo/Launch.java
@@ -108,13 +108,18 @@ private static void initUserInterface()
 			e.printStackTrace();
 		}
 	}
+	
+	public static void runOnUiThread(Runnable r)
+	{
+		SwingUtilities.invokeLater(r);
+	}
 
 	public static void main(final String... args)
 	{
 		// init gui properties
 		Launch.initUserInterface();
 		// startup GUI
-		SwingUtilities.invokeLater(new Runnable()
+		runOnUiThread(new Runnable()
 		{
 			public void run()
 			{
diff --git a/src_all/demos/MobileIMSDK4jDemoX/src/net/openmob/mobileimsdk/java/demo/LoginGUI.java b/src_all/demos/MobileIMSDK4jDemoX/src/net/openmob/mobileimsdk/java/demo/LoginGUI.java
index a80e1abf..272391c1 100755
--- a/src_all/demos/MobileIMSDK4jDemoX/src/net/openmob/mobileimsdk/java/demo/LoginGUI.java
+++ b/src_all/demos/MobileIMSDK4jDemoX/src/net/openmob/mobileimsdk/java/demo/LoginGUI.java
@@ -39,6 +39,7 @@
 import javax.swing.JPanel;
 import javax.swing.JPasswordField;
 import javax.swing.JTextField;
+import javax.swing.SwingUtilities;
 import javax.swing.Timer;
 import javax.swing.border.LineBorder;
 
@@ -113,7 +114,7 @@ private void initViews()
 		mainPanel.addTitledLineSeparator("");
 		JPanel btnAndVerPanel = new JPanel();
 		btnAndVerPanel.setLayout(new BoxLayout(btnAndVerPanel, BoxLayout.LINE_AXIS));
-		JLabel lbVer= new JLabel("v3.0b170713.1");
+		JLabel lbVer= new JLabel("v3.0b170718.4");
 		lbVer.setForeground(new Color(184,184,184));
 		btnAndVerPanel.add(lbVer);
 		btnAndVerPanel.add(Box.createHorizontalGlue());
@@ -183,14 +184,24 @@ public void update(Observable observable, Object data)
 				// 鐧婚檰鎴愬姛
 				if(code == 0)
 				{
-					//** 鎻愮ず锛氱櫥闄哅obileIMSDK鏈嶅姟鍣ㄦ垚鍔熷悗鐨勪簨鎯呭湪姝ゅ疄鐜板嵆鍙�
-					// 杩涘叆涓荤晫闈�
-					MainGUI frame = new MainGUI();
-					frame.setLocationRelativeTo(null);
-					frame.setVisible(true);
-					
-					// 鍚屾椂鍏抽棴鐧婚檰鐣岄潰
-					LoginGUI.this.dispose();
+					//## BUG FIX START: 20170718 by Jack Jiang 
+					//## 璁╀互涓嬩唬鐮佸紓姝ヨ繍琛屼簬EDT绾跨▼锛屼粠鑰岃В鍐崇櫥闄嗙晫闈㈠垏鍒颁富鐣岄潰鏃跺伓灏斿崱姝婚棶棰�
+					// startup GUI
+					Launch.runOnUiThread(new Runnable()
+					{
+						public void run()
+						{
+							//** 鎻愮ず锛氱櫥闄哅obileIMSDK鏈嶅姟鍣ㄦ垚鍔熷悗鐨勪簨鎯呭湪姝ゅ疄鐜板嵆鍙�
+							// 杩涘叆涓荤晫闈�
+							MainGUI frame = new MainGUI();
+							frame.setLocationRelativeTo(null);
+							frame.setVisible(true);
+
+							// 鍚屾椂鍏抽棴鐧婚檰鐣岄潰
+							LoginGUI.this.dispose();
+						}
+					});
+					//## BUG FIX END: 20170718 by Jack Jiang 
 				}
 				// 鐧婚檰澶辫触
 				else