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Covariance and contravariance computer science - Language support | | Covariance and contravariance computer science - Language support: Encyclopedia II - Covariance and contravariance computer science - Language support | |
Covariance and contravariance computer science - Eiffel.
In Eiffel you can get compiler errors, because polymorphism breaks.
Covariance and contravariance computer science - Java.
Return type covariance is implemented in the Java programming language version 1.5. Parameter types have to be exactly the same (invariant) for method overriding, otherwise the method is overloaded with a parallel definition instead.
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See also:Covariance and contravariance computer science, Covariance and contravariance computer science - Language support, Covariance and contravariance computer science - Eiffel, Covariance and contravariance computer science - Java, Covariance and contravariance computer science - REALbasic, Covariance and contravariance computer science - Scala | | | Covariance and contravariance computer science, Covariance and contravariance computer science - Eiffel, Covariance and contravariance computer science - Java, Covariance and contravariance computer science - Language support, Covariance and contravariance computer science - REALbasic, Covariance and contravariance computer science - Scala, covariance and contravariance in mathematics and theoretical physics., polymorphism (computer science), inheritance (computer science) | | |
| | | Covariance and contravariance computer science: Encyclopedia II - Covariance and contravariance computer science - Language support
Covariance and contravariance computer science - Language support
Covariance and contravariance computer science - Eiffel
In Eiffel you can get compiler errors, because polymorphism breaks.
Covariance and contravariance computer science - Java
Return type covariance is implemented in the Java programming language version 1.5. Parameter types have to be exactly the same (invariant) for method overriding, otherwise the method is overloaded with a parallel definition instead.
Covariance and contravariance computer science - REALbasic
REALbasic added support for return type covariance in version 5.5. As with Java, the parameter types of the overriding method must be the same.
Covariance and contravariance computer science - Scala
Scala supports both covariance and contravariance.
Other related archivesEiffel, Java, Java generics, Scala, class, compiler, computer science, covariance and contravariance, inheritance (computer science), object oriented programming, overriding methods, polymorphism, polymorphism (computer science), protocol or interface, subtypes, superclass, supertypes
 Adapted from the Wikipedia article "Language support", under the G.N U Free Docmentation License. Please also see http://en.wikipedia.org/wiki |
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