Use the Class Browser to display global ABAP classes and interfaces or business object types from the class library.

The Class Browser enables you to:

• Display an overview of existing classes, interfaces, and business object types.
• Display the relationships between object types.
• Switch from the overview to maintain an individual object type.

There is a range of preconfigured views that you can use to display object types. You can also set a selection of filters to meet particular display requirements.

• All classes
  Displays all classes and interfaces in the R/3 class library. The display is based on the R/3 component hierarchy.

• Business objects
  Displays business object types from the R/3 class library.

• Other settings
  You can adapt the display further by setting filters. There are three separate selection criteria:
  
  1. Object types
  You can select object types by type, status, and transport attributes.
  
  2. Relationships
  You can select object types based on the relationships between them.
  
  3. Other
  You can use this filter to set whether the object types should be selected according to the component hierarchy or not.

You can switch from the display to maintain an object type by double-clicking it. The system starts the Class Editor of the Class Builder. You can then switch to change mode and modify the object type.

You cannot create new object types from the Class Browser.