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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