Activities in BPM?

1. Add the Component Palette to the JDeveloper window by selecting View > Component Palette from the menu. The palette will appear in the right pane of the window.
2. Select BPM from the drop-down list at the top of the Component Palette, and then expand the Activities accordion panel as shown below.

Below are the list of activities which we can use as part of BPM Development 

Brief introduction about Jdeveloper (IDE)?

About Oracle Developer:

1.    Oracle JDeveloper is a free integrated development environment (IDE) that simplifies the development of Java-based SOA and Java EE applications.
2.    JDeveloper offers complete end-to-end development to Oracle Fusion Middleware and Oracle Fusion Applications with support for the full development life cycle.
3.    Prior to JDeveloper 11g, JDeveloper came in three editions:
               i)Java Edition,
               ii)J2EE Edition,
               iii)Studio Edition. Each one offered more features on top of the others, and all of them     came for free.
 JDeveloper 11g only has two editions: Studio Edition and Java Edition. In JDeveloper 11g, J2EE Edition features are rolled into the Studio Edition.
4.     It supports the complete development lifecycle with integrated features for modeling, coding, debugging, testing, profiling, tuning, and deploying applications.
5.    Jdev can be used for various technology stacks including Java, SOA, Oracle WebCenter, SQL and PL/SQL, HTML, JavaScript and XML-based application development.
6.    Oracle JDeveloper provides a visual and declarative development approach and works together with the Oracle ADF to simplify development.
History
The 10g version (9.0.5) showcased the first release of the revamped Oracle ADF.
In 2005 Oracle Corporation released JDeveloper as free software.
In 2006, still under the 10g tag, and after significant delays, Oracle released version 10.1.3 - the latest major 10g release.
In October 2006, Oracle released version 10.1.3.
 In January 2007, Oracle released version 10.1.3.2
In May 2007 Oracle released a technology preview release of version 11g.
In October 2008 the production version of Oracle JDeveloper 11g, code named BOXER, became available.
In July 2009 JDeveloper 11g version 11.1.1.1.0
In June 2011 JDeveloper 11g (11.1.2.0.0)
In September 2011 Jdeveloper 11g (11.1.2.1.0)
In May 2012 Jdeveloper 11g (11.1.2.2.0)
In September 2012 Jdeveloper 11g (11.1.2.3.0)