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VAADIN Scrollbar 8 Years Ago by fo2sh Hello, I am trying to add a scrollbar to my code with no luck to do so, could anybody help in this, thx in advance. Below is my code. @import "../chameleon/styles.css"; /** * "optional-" prefix means that the style is not necessarily used, it can be left blank * "generated-" prefix means that… NumberFormatException error: how to deal with it 7 Years Ago by Violet_82 …; import com.vaadin.server.Page; import com.vaadin.shared.Position; import com.vaadin.ui.Button; import com.vaadin.ui.Button.ClickEvent…; import com.vaadin.ui.CustomComponent; import com.vaadin.ui.Notification; import com.vaadin.ui.TextField; import com.vaadin.ui.VerticalLayout; … Simplest RPC call maven application, how to 8 Years Ago by Violet_82 ….vaadin.annotations.VaadinServletConfiguration; import com.vaadin.annotations.Widgetset; import com.vaadin.server.Page; import com.vaadin.server.VaadinRequest; import com.vaadin.server.VaadinServlet; import com.vaadin… Re: Building a java converter 7 Years Ago by Violet_82 ….vaadin.annotations.VaadinServletConfiguration; import com.vaadin.annotations.Widgetset; import com.vaadin.server.VaadinRequest; import com.vaadin.server.VaadinServlet; import com.vaadin.ui.Button; import com.vaadin… Liferay IPC portlet errors 12 Years Ago by RykeTech …]Widgetset does not contain implementation for com.vaadin.addon.ipcforliferay.LiferayIPC. Check its @ClientWidget … Widgetset does not contain implementation for com.vaadin.addon.ipcforliferay.LiferayIPC. Check its @ClientWidget … add-on instructions. Unrendered UIDL: com.vaadin.addon.ipcforliferay.LiferayIPC(NO CLIENT IMPLEMENTATION FOUND)… How to handle Error Handling 7 Years Ago by Violet_82 …InputMismatchException; import com.vaadin.server.Page; import com.vaadin.shared.Position; import com.vaadin.ui.Button; import com.vaadin.ui.Button.ClickEvent…; import com.vaadin.ui.CustomComponent; import com.vaadin.ui.Notification; import com.vaadin.ui.TextField; import com.vaadin.ui.VerticalLayout; … Re: Building a java converter 7 Years Ago by stultuske … things together. Violet, nobody ever said you shouldn't learn Vaadin, but you have to use that framework: good, use it… easy to implement, but it should not be implemented in Vaadin, but in a business module which can be called by… Re: Building a java converter 7 Years Ago by Violet_82 …, but I run into a problem: package com.vaadin.project.converterRedone; import com.vaadin.ui.CustomComponent; public class ConverterModel extends CustomComponent { private… Re: Building a java converter 7 Years Ago by Violet_82 ….convertFromBaseValue(baseValue);*/ And the UnitDef.java package com.vaadin.project.converterRedone; import com.vaadin.ui.CustomComponent; public class UnitDef extends CustomComponent{ public… Building a java converter 7 Years Ago by Violet_82 … miles and so on. The framework I will use is vaadin (unfortunately) but it will still be java anyway :-). So, I… Re: Building a java converter 7 Years Ago by stultuske I hate to tell you, but if you are planning to use a UI framework (Vaadin) to implement business logic, you should first learn basic OO principles. Re: Building a java converter 7 Years Ago by Violet_82 … as it's just an exercise). As for tht silly Vaadin, I personally hate it, but alas, that's what it… Re: Building a java converter 7 Years Ago by Violet_82 that's what I usually do with vaadin, meaning I implement the UI in vaddin, like layout (vertical, … Re: Building a java converter 7 Years Ago by AssertNull … this thread because I have no opinion at all on Vaadin. Just wanted to report that I've seen the light… Java Basics - Annotations 1 Year Ago by dimitrilc … duties, so Spring can set up the environment correctly. 4. **Vaadin framework**: `@Route` is used to configure navigation routes. 5. **Android… Re: forum like software using java 11 Years Ago by ~s.o.s~ … are three big/famous ones which come to mind: * [Vaadin](https://vaadin.com/home) * [Spring MVC](http://static.springsource.org/spring/docs… Re: Is a four year CS degree necessary to become a Java programmer? 9 Years Ago by llaspina … students knew from my class was standard Java. I chose Vaadin as the framework for building the web application because it… learn. Students worked in groups to learn and then apply: * Vaadin Framework for the UI * MySQL to store the registered tutors… Re: interfaces and classes exercise 7 Years Ago by Violet_82 … the changes I've made. 1)moved the application into vaadin, as I needed to run it into the browser in…; import java.util.ArrayList; import java.util.List; import com.vaadin.ui.TextField; public class EmployeeService { List<Employee> employee… Re: What you recommend..... 13 Years Ago by RykeTech I started with EE using Vaadin UI framework, Maven, and Netbeans IDE, love it so far! Re: Java IDE 12 Years Ago by RykeTech I used Notepad/cmd for my one semester of Java in college, but when hired by a company I was introduced to Netbeans/Maven/Vaadin/Liferay and I wouldn't have it any other way now. Also a big fan of Notepad++ Re: NumberFormatException error: how to deal with it 7 Years Ago by JamesCherrill Yes, you need to catch the NumberFormatException that's thrown when the user input is not numeric. > I would have thought that the InputMismatchException would take care of it No. When in doubt, read the API documentation, eg * public static int parseInt(String s) throws NumberFormatException Parses the string argument as a … Re: NumberFormatException error: how to deal with it 7 Years Ago by Violet_82 Ah, thanks, I got the wrong exception! Re: NumberFormatException error: how to deal with it 7 Years Ago by JamesCherrill Yup, that's right! JC Re: How to handle Error Handling 7 Years Ago by Olyboy16 the result textfield object instance is used in your try block to display the division result that u calculated there. Re: How to handle Error Handling 7 Years Ago by AssertNull There's more than one way to do this. Figure out what you want validateInputs to do. Right now it's grabbing the Strings from the textboxes, parsing them into integers, doing the division, catching exceptions, and popping up error boxes. Now, do you want it to also fill in the answer box if all the tests pass (i.e. no exception is thrown). If … Re: How to handle Error Handling 7 Years Ago by JamesCherrill > I could get my validateInputs() to return a boolean value of false if an exception has occurred and true if it hasn't, pass that back to the caller and take it from there. Without going into all the details, that sounds like a good idea. In general it's a common practice to set some error flag in a catch block, or (if it's in a method… Re: How to handle Error Handling 7 Years Ago by Violet_82 thanks guys. Now, regardless of the way I do it, I still need a mechanism to determine whether the inputs are valid or not, that's where I think I got stuck, sorry maybe I didn't explain the issue correctly. So, for example, where I have the try/catch statement: try{ divisionResult = ( Integer.parseInt(getDividend()) / … Re: How to handle Error Handling 7 Years Ago by AssertNull >I still need a way to say "if the result is valid, then do result.setValue(parseInt(divisionResult));". Wouldn't it be easiest to add the code between lines 2 and 3 above that executes if and only if no exception is thrown? That's the whole point of try-catch blocks. You put code that potentially throws an exception in the try … Re: How to handle Error Handling 7 Years Ago by JamesCherrill In a really trivial case like this there's no harm in putting it all in the try/catch, but moving forwards that's a bad practice because it doesn't scale at all. Keep the logic and the UI details separate. Re: How to handle Error Handling 7 Years Ago by Violet_82 I see, thanks. I think i might have had the wrong idea about the try/catch statement, that's why I didn't consider that option AssertNull. > You put code that potentially throws an exception in the try block I took that literally, meaning that I'd put in there only the code that would trrow an exception, in this case `divisionResult = ( …