now i want to implement this interface with the class. so how should i do it?
public class TMark<E> implements ITMark{}
is this the way but throwing errors
I am getting the following:
ITMark is a raw type. References to generate type ITMark<E> should be parametrized
I am implementing this code in Eclipse IDE
Do this:
public class TMark<SomeComparableClass> implements ITMark<SomeComparableClass> {
// implement the methods of ITMark for type SomeComparableClass
}
You must specify which Comparable class you are implementing for this class. FYI, most common java types (eg Integer, String, Date, etc) are Comparable.
ITMark
is a raw type because it has no declared generic parameters.
If you declared TMark
as TMark<E extends Comparable<E>> implements ITMark<E>
, it would not longer be a raw type because you declared its generic parameter.
You left out the generic parameter, that is, the part that goes in the angle brackets. You need something like:
public class TMark <E extends Comparable <E> implements ITMark<E>
{
...
}
For a particular generic type you put a suitable 'Comparable' type inside the angle brackets, something like:
public class IntegerTMark extends TMark <Integer>
{
...
}
For a good introduction to generics, read the Java tutorials, the free chapter from Joshua Bloch's Effective Java at http://java.sun.com/docs/books/effective/generics.pdf and the many articles about generics at https://www.ibm.com/developerworks/java/ .
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