Bugzilla – Full Text Bug Listing
| Summary: | [5.0] 3.1M4 spurious type-safety compiler warning | ||
|---|---|---|---|
| Product: | [Eclipse Project] JDT | Reporter: | mike andrews <mikea> |
| Component: | Core | Assignee: | JDT-Core-Inbox <jdt-core-inbox> |
| Status: | RESOLVED DUPLICATE | QA Contact: | |
| Severity: | normal | ||
| Priority: | P3 | ||
| Version: | 3.1 | ||
| Target Milestone: | 3.1 M5 | ||
| Hardware: | PC | ||
| OS: | Windows XP | ||
| Whiteboard: | |||
hmmmm.... still get the error without anonymous class now... but the following
standalone class completely demonstrates the problem: indicated line generates
compiler warning "Type safety: The return type String of the method call() of
type Test needs unchecked conversion to conform to the return type V of
inherited method":
package test.a;
import java.util.concurrent.Callable;
class Test implements Callable<String> {
public String call() throws Exception { // THIS LINE GENERATES WARNING
return new String("");
}
}
|
given the following two classes: package test.a; public class TestB { } package test.a; import java.util.concurrent.Callable; import java.util.concurrent.CompletionService; import java.util.concurrent.Future; public class TestA { private CompletionService<TestB> cs; public Future<TestB> submitTask(String command) { return cs.submit(new Callable<TestB>() { public TestB call() throws Exception { // LINE IN QUESTION return new TestB(); } }); } } i get a compiler warning: "Type safety: The return type TestB of the method call() of type new Callable<TestB>(){} needs unchecked conversion to conform to the return type V of inherited method" in TestA.java this doesn't seem correct, since i can use a non-anonymous class instead (for the line in question), with no compiler warning.