As with Eclipse 3.x, a command has an identifier and an associated Handler class, which can be bound to Menus. Unlike Eclipse 3.x, it is not specified in the plugin.xml file; instead, it is specified in the Application.e4xmi file.
Open the
Application.e4xmifile in thecom.packtpub.e4.applicationproject.Navigate to the Application | Commands node in the tree, and click on Add child to add a new command:
ID:
com.packtpub.e4.application.command.helloName:
helloCommandDescription:
Says Hello
Create a
HelloHandlerclass in thecom.packtpub.e4.application.handlerspackage. It doesn't need to have any specific superclass or method implementation. Instead, create a method calledhello()which takes no arguments, and prints a message toSystem.out. The method needs the@Executeannotation:package com.packtpub.e4.application.handlers; import org.eclipse.e4.core.di.annotations.Execute; public class HelloHandler { @Execute public void...