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Background documentation Mapping of Java and ABAP Data Types  Locate the document in its SAP Library structure


A data structure is made up of individual fields and each field is assigned to a particular data type. Because ABAP uses different data types to Java, it is necessary to create a link between these data types (mapping). The table displayed below shows the different data types in ABAP and Java and their mapping.

Data Type Mapping



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In most cases, handling of data types does not represent a problem. However, the ABAP data types for date and time have some special features. ABAP has two different data types for processing date and time information:

·         ABAP data type T is a 6-byte string with the format HHMMSS.

·         ABAP data type D is an 8-byte string with the format YYYYMMDD.

Both data types are used in RFMs (including BAPIs). When a BAPI uses a time stamp two fields are used, one of type D and one of type T.

Java, however, only uses one class (Date) to represent both date and time information. In Java, a time stamp can therefore be displayed in one variable.

SAP JCo automatically performs the conversion between ABAP and Java data types. Fields of the ABAP data types D and T are represented as Java Date objects, whereby the part of the Date object that is not used retains its default value. Java developers need to distinguish between whether a particular field contains an ABAP date or an ABAP time.




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