Bugzilla – Full Text Bug Listing
| Summary: | [1.5][compiler] Inheritance with generic parameter poses problem if formulated differently | ||||||||
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| Product: | [Eclipse Project] JDT | Reporter: | Volker Renneberg <volker.renneberg.external> | ||||||
| Component: | Core | Assignee: | JDT-Core-Inbox <jdt-core-inbox> | ||||||
| Status: | RESOLVED INVALID | QA Contact: | |||||||
| Severity: | normal | ||||||||
| Priority: | P3 | ||||||||
| Version: | 3.2 | ||||||||
| Target Milestone: | 3.3 M1 | ||||||||
| Hardware: | PC | ||||||||
| OS: | Windows XP | ||||||||
| Whiteboard: | |||||||||
| Attachments: |
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Created attachment 45450 [details]
SuperInterface
The given interface is in a package called "inheritance".
Created attachment 45451 [details]
ProblemClass
The given interface is in a package called "inheritance".
This is the intended behavior. Javac 1.6b88 agrees with us. Now I agree on the surface this is questionnable as a wildcard is usually considered to act as a type parameter when only referenced once...
To avoid the problem, define instead the following, which will be somewhat equivalent.
class ProblemClass implements SuperInterface {
public <B extends JLabel> void doIt(Collection<B> as) {
}
}
Added MethodVerifyTest#test095-096
Actually, tests are MethodVerifyTest#test096-097 |
Hi! I do not know, whether this is an eclipse bug or not: Assume, you have the following interface: import java.util.Collection; import javax.swing.JLabel; public interface SuperInterface { public <A extends JLabel> void doIt(Collection<A> as); } and the following class, that inherits from the interface: import java.util.Collection; import javax.swing.JLabel; public class ProblemClass implements SuperInterface { public void doIt(Collection<? extends JLabel> as) { } } Eclipse 3.2RC7 does not recognize the implementing method as an implementation. It says, there is a name clash. ciao Volker