GWT Devevelopment Mode is a feature of Google Web Toolkit allowing developers to run a GWT module inside a Web browser (with the help of a plugin) without having to do a full compilation to javascript.
After a lot of pain,Finally installed GWT 2.5 with my Eclipse kepler Now I am able to launch with Dev …
java gwt gwt-2.5 gwt-dev-mode gwt-super-dev-mode