Bugzilla – Full Text Bug Listing
| Summary: | [1.5] generics T does not match ? super (? extends T) | ||
|---|---|---|---|
| Product: | [Eclipse Project] JDT | Reporter: | Garret Wilson <garret> |
| Component: | Core | Assignee: | JDT-Core-Inbox <jdt-core-inbox> |
| Status: | RESOLVED WORKSFORME | QA Contact: | |
| Severity: | normal | ||
| Priority: | P3 | ||
| Version: | 3.1 | ||
| Target Milestone: | 3.1 M5 | ||
| Hardware: | PC | ||
| OS: | Windows XP | ||
| Whiteboard: | |||
Following test case compiles without any error:
import java.io.File;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
public class Test {
public static <T> void myMethod(final List<? extends File> fileList) {
Collections.sort(fileList, new Comparator<File>(){
public int compare(File f1, File f2) { return 0; }
});
}
}
Surely fixed with latest 1.5 changes...
Yes---I've verified this now compiles under 3.1 M5. Garret |
I20050202-0800-win32 Inside the following method: public static <T> void myMethod(final List<? extends File> fileList) I attempt to sort the list using: Collections.sort(fileList, new Comparator<File>(){...}); I get the following error: "The method sort(List<T>) in the type Collections is not applicable for the arguments (List<? extends File>, new Comparator<File>(){})" The Collections.sort() signature is: public static <T> void sort(List<T> list, Comparator<? super T> c) Substituting, I get (File super (? extends File)), which means Comparator<File> should match the signature because File is always a superclass of anything that extends File. This worked under 3.1 M4. Garret