I am learning GWT, so I am following this tutorial from Google GWT https://developers.google.com/web-toolkit/tools/gwtdesigner/tutorials/stockwatcher
In this I have to open a java file in design mode. There I am getting the error
java.lang.ClassNotFoundException: com.google.gwt.dev.shell.designtime.HostedModeSupportImpl
I installed GWT designer via zip file, unzipping it and extracting it in the plugins and features folder.
Is it correct way ? is that the reason why the java file is not opening in design mode?
Also, I am not able to install a new software in eclipse, See my question ->
Eclipse 3.7 Indigo-'Install new software' not progressing : GWT Designer
The cause of the problem was AVG Antivirus blocking the installation. Make sure you don't have an antivirus running on your computer that will block software installations on Eclipse.