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Abstract type: Difference between revisions
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B:new() -- Error: B is abstract
BB:new() -- Okay: BB is not abstract</lang>
=={{header|NetRexx}}==
<lang NetRexx>/* NetRexx */
options replace format comments java crossref savelog symbols binary
-- -----------------------------------------------------------------------------
class RCAbstractType public final
method main(args = String[]) public constant
say ' Testing' RCAbstractType.class.getSimpleName
say ' Creating an object of type:' Concrete.class.getSimpleName
conk = Concrete()
say 'getClassName:'.right(20) conk.getClassName
say 'getIfaceName:'.right(20) conk.getIfaceName
say 'mustImplement:'.right(20) conk.mustImplement
say 'canOverride1:'.right(20) conk.canOverride1
say 'canOverride2:'.right(20) conk.canOverride2
say 'callOverridden2:'.right(20) conk.callOverridden2
return
-- -----------------------------------------------------------------------------
class RCAbstractType.Iface interface
ifaceName = RCAbstractType.Iface.class.getSimpleName
method getIfaceName() public returns String
method canOverride1() public returns String
method canOverride2() public returns String
-- -----------------------------------------------------------------------------
class RCAbstractType.Abstraction abstract implements RCAbstractType.Iface
properties inheritable
className = String
method Abstraction() public
setClassName(this.getClass.getSimpleName)
return
method mustImplement() public abstract returns String
method getClassName() public returns String
return className
method setClassName(nm = String) public
className = nm
return
method getIfaceName() public returns String
return RCAbstractType.Iface.ifaceName
method canOverride1() public returns String
return 'In' RCAbstractType.Abstraction.class.getSimpleName'.canOverride1'
method canOverride2() public returns String
return 'In' RCAbstractType.Abstraction.class.getSimpleName'.canOverride2'
-- -----------------------------------------------------------------------------
class RCAbstractType.Concrete extends RCAbstractType.Abstraction
method Concrete() public
super()
return
method mustImplement() public returns String
return 'In' RCAbstractType.Concrete.class.getSimpleName'.mustImplement'
method canOverride2() public returns String
return 'In' RCAbstractType.Concrete.class.getSimpleName'.canOverride2'
method callOverridden2() public returns String
return super.canOverride2
</lang>
;Output
<pre>
Testing RCAbstractType
Creating an object of type: Concrete
getClassName: Concrete
getIfaceName: Iface
mustImplement: In Concrete.mustImplement
canOverride1: In Abstraction.canOverride1
canOverride2: In Concrete.canOverride2
callOverridden2: In Abstraction.canOverride2
</pre>
=={{header|Objeck}}==
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