Tips for OO
1 常用的标准 CLASS 和 INTERFACE.......................................................................................2
2 LOCAL CLASS..................................................................................................................... 5
3 GLOBAL CLASS................................................................................................................... 6
3.1 GLOBAL CLASS – DIRECT TYPE DEFINITION.........................................................................7
3.3 CREATION OF A GLOBAL CLASS.........................................................................................8
4 ACCESS MODIFIERS.........................................................................................................14
4.1 5 RULES OF THUMB FOR ACCESS MODIFIERS...................................................................14
5 CREATION OF AN INTERFACE.........................................................................................15
1 OBJECTIVE......................................................................................................................... 15
2 DATABASE TABLES............................................................................................................. 16
3 INTERFACE......................................................................................................................... 17
6 CREATION OF AN EXCEPTION CLASS...........................................................................17
1 OBJECTIVE......................................................................................................................... 18
2 EXCEPTION CLASSES IN OBJECT ORIENTED PROGRAMMING.................................................18
7 CONSTRUCTOR & CLASS CONSTRUCTOR....................................................................24
1 Code Snippet................................................................................................................................25
2 Code Snippet – Constant access Scenario....................................................................................28
3 Code Snippet – Instanaon scenario.........................................................................................28
4 Code Snippet – Complex..............................................................................................................28
8 NARROW CASTING & WILD CASTING.............................................................................30
9 REFACTORING................................................................................................................... 30
1 MOVING COMPONENTS FROM SUPER CLASS TO SUBCLASS...................................................30
2 MOVING COMPONENTS FROM CLASS TO ASSOCIATED CLASS................................................31
9 ABAP OBJECTS QUESTIONS ANSWERS........................................................................33
8 事务的处理........................................................................................................................... 35
9 PERSISTENT CLASS & DATA ACCESS CLASS..............................................................37
1 CREATE A NEW RECORD/ READ A RECORD BY KEY................................................................41
2 QUERY FOR MULTIPLE RECORDS........................................................................................44
10 CREATION OF AN EDITABLE ALV.................................................................................45
11 MODEL CLASS & BUSINESS OBJECT CLASS..............................................................45
12 ENHANCEMENT TO A STANDARD CLASS...................................................................46
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