新手入门： SAP ABAP编程教程4.6版详解
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"本教程是针对 SAP ABAP 的入门指南，专为新手设计，旨在帮助学习者掌握 SAP ABAP 编程的基础知识。内容涵盖了 BCABAPProgramming Release 4.6B，其中的 HELP.BCABA 提供了详细的指导。教程发布于 1999 年 12 月，强调版权信息，声明所有权利归 SAPAG 所有，未经许可，不得复制或传播。
该教程深入浅出地介绍了 SAP AG（SAP 软件开发公司）开发的 ABAP（Advanced Business Application Programming）语言，这是一种用于企业应用开发的强大工具。通过学习，读者将了解到如何在 SAP 系统中进行编程，包括但不限于事务处理、数据结构、循环控制语句以及与 SAP 环境集成的技术。同时，教程也提到了 SAP 系统与其他知名软件如 Microsoft Windows、Oracle、IBM DB2、Informix 和 Unix 等的兼容性和交互。
值得注意的是，课程中涉及的部分软件产品和技术，如 Microsoft Excel、Word、PowerPoint 和 SQL Server，是微软公司的注册商标；而 IBM 的 DB2、OS/2、AIX 等则是 IBM 公司的注册商标。此外，Oracle、Informix 和 W3C 的 HTML、DHTML、XML、XHTML 也是各自领域的知名商标。
对于想要进入 SAP 开发领域的人来说，这是一份宝贵的参考资料，它不仅教授技术知识，还强调了版权法规的重要性。学习者在遵循版权规定的同时，可以系统地学习 SAP ABAP 的核心概念，提升在 SAP 生态系统中的开发能力。"
BC - ABAP Programming SAP AG
16 December 1999
What is Object Orientation? ............................................................................................. 1345
What are ABAP Objects? .................................................................................................. 1348
From Function Groups to Objects ................................................................................... 1349
Example.......................................................................................................................... 1352
Classes ............................................................................................................................... 1353
Overview Graphic ........................................................................................................... 1358
Classes - Introductory Example ..................................................................................... 1359
Object Handling ................................................................................................................. 1360
Overview Graphic ........................................................................................................... 1363
Objects - Introductory Example ...................................................................................... 1364
Declaring and Calling Methods ........................................................................................ 1365
Methods in ABAP Objects - Example............................................................................. 1368
Inheritance.......................................................................................................................... 1380
Inheritance: Overview Graphic ....................................................................................... 1385
Inheritance: Introductory Example.................................................................................. 1388
Interfaces ............................................................................................................................ 1390
Overview Graphics ......................................................................................................... 1394
Interfaces - Introductory Example .................................................................................. 1395
Triggering and Handling Events ...................................................................................... 1397
Overview Graphic ........................................................................................................... 1400
Events: Introductory Example ........................................................................................ 1403
Events in ABAP Objects - Example................................................................................ 1405
Class Pools......................................................................................................................... 1411
Appendix............................................................................................................................. 1414
Programs, Screens, and Processing Blocks .................................................................. 1415
Introductory Statements for Programs ........................................................................... 1419
Overview of ABAP Calls.................................................................................................... 1421
Call Contexts .................................................................................................................. 1422
Internal Calls ............................................................................................................. 1423
External Procedure Calls........................................................................................... 1425
External Program Calls ............................................................................................. 1427
Callable Units ................................................................................................................. 1429
ABAP Programs ........................................................................................................ 1430
Procedures ................................................................................................................ 1432
Screens and Screen Sequences............................................................................... 1434
ABAP Statement Overview ............................................................................................... 1437
ABAP System Fields ......................................................................................................... 1498
ABAP Glossary .................................................................................................................. 1522
Syntax Conventions .......................................................................................................... 1540
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