Implementing the Raw Type of Generic Interface

Java-Implementing the Raw Type for the Generic Interface

Implementing the Raw Type for the Generic Interface Every generic interface has a raw type. When you implement an generic interface in an ordinary class without specifying a type argument, your class is implementing the raw type, so the methods in the interface are declared with parameters and/or return types of type Object. For example … Read more…

Ambiguity Errors in Generics

Java-Ambiguity Errors in Generics

Ambiguity Errors in Generics The inclusion of generics gives rise to another type of error that you must guard against: ambiguity. Ambiguity errors occur when erasure causes two seemingly distinct generic declarations to resolve to the same erased type, causing a conflict. Following is an example that involves method overloading : Gen declares two generic … Read more…

Generic Interfaces

Java-Generic Interfaces

Generic Interfaces Generics also work with interfaces. Thus, you can also have generic interfaces. Generic interfaces are specified just like generic classes. For example : The MyInterface is a generic interface that declares the method called myMethod( ). In general, a generic interface is declared in the same way as is a generic class. In this case, the … Read more…

Bridge Method

Java-Bridge Method

Bridge Method Sometimes, the compiler will need to add a bridge method to a class to handle situations in which the type erasure of an overriding method in a subclass does not produce the same erasure as the method in the superclass. In this case, a method is generated that uses the type erasure of … Read more…

Overriding Methods

Java-Overriding Methods

Overriding Methods A method in a generic class can be overridden just like any other method. For example, consider the following program in which the method getT( ) is overridden. As the output confirms, the overridden version of getT( ) is called for object of type GenTwo, but you can call the superclass version via GenOne object. … Read more…