1.普通的class類呼叫
*類定義
public section.
methods:show_text."定義的方法名 show_text
private section.
data text(100) type c value 'this is my first abap object.'.
endclass.
*類實現
write text.
endmethod.
endclass.
*第二個例子
*類定義
class vehicle definition.
public section.
class-data class_name(10) type c value 'vehicle'.
methods:accelerate,"定義的方法 accelerate 和 show_speed
show_speed.
protected section.
data speed type i.
endclass.
class vehicle implementation."方法的實現
method accelerate.
speed = speed + 1.
endmethod.
method show_speed.
write: / 'speed:',speed.
endmethod.
endclass.
start-of-selection.
*呼叫類中的方法
*類呼叫
data obj_vehicle type ref to vehicle.
create object obj_vehicle.
do 10 times.
call method obj_vehicle->accelerate.
enddo.
call method obj_vehicle->show_speed.
2.構造輸入輸出引數
class circle definition.
public section.
methods get_area importing value(i_radius) type i
returning value(r_size) type f.
private section.
* 定義靜態變數
constants pi type f value '3.14159265'.
endclass.
class circle implementation.
method get_area.
r_size = i_radius ** 2 * pi.
endmethod.
endclass.
*彈出引數輸入螢幕
parameters radius type i.
data: o_circle type ref to circle,
area type f.
start-of-selection.
create object o_circle.
call method o_circle->get_area
exporting i_radius = radius
receiving r_size = area.
write: / area.
3.傳遞構造引數
class vehicle definition.
public section.
methods: accelerate importing rate type i,
* 定義建構函式，有乙個輸入引數
constructor importing i_speed type i,
show_speed.
private section.
data speed type i value 0.
endclass.
class vehicle implementation.
method accelerate.
speed = speed + rate.
endmethod.
method show_speed.
write: / speed.
endmethod.
method constructor.
speed = i_speed.
endmethod.
endclass.
data o_vehicle type ref to vehicle.
start-of-selection.
* 這個建構函式傳了引數進去
create object o_vehicle exporting i_speed = 4.
call method o_vehicle->accelerate exporting rate = 2.
call method o_vehicle->accelerate exporting rate = 2.
call method o_vehicle->show_speed.
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