GWT Menu example

Here is one simple example to create GWT Menu, please follow below steps to create Menus

1. Create a GWT Project and update Entry point class with below code

import com.google.gwt.core.client.EntryPoint;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.user.client.Command;
import com.google.gwt.user.client.Window;
import com.google.gwt.user.client.ui.Button;
import com.google.gwt.user.client.ui.Label;
import com.google.gwt.user.client.ui.MenuBar;
import com.google.gwt.user.client.ui.RootPanel;
 
/**
 * Entry point classes define <code>onModuleLoad()</code>.
 */
public class PretechGWT implements EntryPoint {
 
 @Override
  public void onModuleLoad() {
  Command cmd = new Command() {
       public void execute() {
         Window.alert("You selected a menu item!");
       }
     };
    Label label = new Label("Hello World");
    Button button = new Button("Click on this");
 
    MenuBar pretechMenu = new MenuBar();
   
    pretechMenu.addItem("Home", cmd);
    pretechMenu.addItem("Frameworks", cmd);
    pretechMenu.addItem("Java/J2ee",cmd);
    pretechMenu.addItem("Mongodb",cmd);
 
    button.addClickHandler(new ClickHandler() {
      @Override
      public void onClick(ClickEvent event) {
        Window.alert("Hello good morning.. this message from event");
      }
    });
    RootPanel.get().add(pretechMenu);
    RootPanel.get().add(label);
    RootPanel.get().add(button);
 }
}

2. Run application