Bugzilla – Full Text Bug Listing
| Summary: | [1.5][compiler] Eclipse gives a "name clash" error while javac accepts the code | ||
|---|---|---|---|
| Product: | [Eclipse Project] JDT | Reporter: | Zorzella Mising name <zorzella> |
| Component: | Core | Assignee: | Kent Johnson <kent_johnson> |
| Status: | VERIFIED FIXED | QA Contact: | |
| Severity: | major | ||
| Priority: | P3 | ||
| Version: | 3.2 | ||
| Target Milestone: | 3.2 RC2 | ||
| Hardware: | PC | ||
| OS: | Linux | ||
| Whiteboard: | |||
I don't know if it's the same root, but an error also happens when using @Override with static methods. This code has both conditions:
import java.util.Collection;
public class Parent {
public static void error (Collection c){}
public static void error2 () {}
public static class Child extends Parent {
public static void error(Collection<String> c) {}
@Override public static void error2() {}
}
}
Reproduced first problem in latest.
Second issue is expected behavior. Static methods are not overriding.
Javac1.6 says:
X.java:9: method does not override a method from its superclass
@Override public static void error2() {}
^
1 error
We should not detect name clashes between inherited static methods.
The following case shows that the instance methods do cause a name clash:
import java.util.Collection;
class Parent {
static void staticCase1(Collection c) {}
static void staticCase2(Collection<String> c) {}
void instanceCase1(Collection c) {}
void instanceCase2(Collection<String> c) {}
}
class Child extends Parent {
static void staticCase1(Collection<String> c) {}
static void staticCase2(Collection c) {}
// @Override is an error for instanceCase1
// name clash: instanceCase1(Collection<String>) in Child and
// instanceCase1(Collection) in Parent have the same erasure, yet
// neither overrides the other
void instanceCase1(Collection<String> c) {}
@Override void instanceCase2(Collection c) {}
}
case2 is allowed for compatibility reasons, but case1 is a name clash.
Added MethodVerifyTest 85 Verified with I20060427-1600 for 3.2RC2 |
The code below gives forth this compilation error, but javac is OK with it: clash: The method error(Collection<String>) of type Parent.Child has the same erasure as error(Collection) of type Parent but does not override it *********** Parent.java ************* import java.util.Collection; public class Parent { public static void error (Collection c){ } public static class Child extends Parent { public static void error(Collection<String> c) { } } }