no message

.gitignore

+target/classes/org/s4s/SimpleLoginMainView$1.class
+target/classes/org/s4s/SimpleLoginMainView.class
+target/classes/org/s4s/SimpleLoginUI$1.class
+target/classes/org/s4s/SimpleLoginUI.class
+target/classes/org/s4s/SimpleLoginView$PasswordValidator.class
+target/classes/org/s4s/SimpleLoginView.class

.idea/misc.xml

@@ -38,6 +38,9 @@
       <property name="caretWidth" class="java.lang.Integer" />
     </properties>
   </component>
+  <component name="EntryPointsManager">
+    <entry_points version="2.0" />
+  </component>
   <component name="FrameworkDetectionExcludesConfiguration">
     <file type="gwt" url="file://$PROJECT_DIR$" />
     <file type="web" url="file://$PROJECT_DIR$" />
@@ -49,7 +52,7 @@
       </list>
     </option>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" default="true" project-jdk-name="1.8" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" default="true" assert-keyword="true" jdk-15="true" project-jdk-name="1.8" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/classes" />
   </component>
 </project>
\ No newline at end of file

shopInShop.iml

@@ -14,14 +14,17 @@
       </configuration>
     </facet>
   </component>
-  <component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_1_8">
+  <component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_1_8" inherit-compiler-output="false">
     <output url="file://$MODULE_DIR$/target/classes" />
     <output-test url="file://$MODULE_DIR$/target/test-classes" />
     <content url="file://$MODULE_DIR$">
       <sourceFolder url="file://$MODULE_DIR$/src/main/java" isTestSource="false" />
       <sourceFolder url="file://$MODULE_DIR$/src/main/resources" type="java-resource" />
       <sourceFolder url="file://$MODULE_DIR$/target/generated-resources/gwt" type="java-resource" />
-      <excludeFolder url="file://$MODULE_DIR$/target" />
+      <excludeFolder url="file://$MODULE_DIR$/target/.generated" />
+      <excludeFolder url="file://$MODULE_DIR$/target/classes" />
+      <excludeFolder url="file://$MODULE_DIR$/target/maven-status" />
+      <excludeFolder url="file://$MODULE_DIR$/target/tmp" />
     </content>
     <orderEntry type="inheritedJdk" />
     <orderEntry type="sourceFolder" forTests="false" />

src/main/java/org/s4s/MyUI.java

+
 package org.s4s;
 
 import javax.servlet.annotation.WebServlet;
 
 import com.vaadin.annotations.Theme;
 import com.vaadin.annotations.VaadinServletConfiguration;
+import com.vaadin.navigator.Navigator;
 import com.vaadin.server.VaadinRequest;
 import com.vaadin.server.VaadinServlet;
-import com.vaadin.ui.Button;
-import com.vaadin.ui.Label;
-import com.vaadin.ui.TextField;
-import com.vaadin.ui.UI;
-import com.vaadin.ui.VerticalLayout;
+import com.vaadin.ui.*;
+
 
 /**
  * This UI is the application entry point. A UI may either represent a browser window 
@@ -19,17 +18,25 @@ import com.vaadin.ui.VerticalLayout;
  * The UI is initialized using {@link #init(VaadinRequest)}. This method is intended to be 
  * overridden to add component to the user interface and initialize non-component functionality.
  */
+
 @Theme("mytheme")
 public class MyUI extends UI {
+    Navigator navigator;
+    protected static final String MAINVIEW = "main";
+
 
     @Override
     protected void init(VaadinRequest vaadinRequest) {
+
         Label label = new Label("Das erste Label unseres Shop in Shop System");
         setContent(label);
+
     }
 
-    @WebServlet(urlPatterns = "/*", name = "MyUIServlet", asyncSupported = true)
+    @WebServlet(urlPatterns = "*/
+/*", name = "MyUIServlet", asyncSupported = true)
     @VaadinServletConfiguration(ui = MyUI.class, productionMode = false)
     public static class MyUIServlet extends VaadinServlet {
     }
 }
+