Bugzilla – Full Text Bug Listing
| Summary: | [compiler] ClassFormatError when accessing clone() or finalize() methods from an interface | ||
|---|---|---|---|
| Product: | [Eclipse Project] JDT | Reporter: | Olivier Thomann <Olivier_Thomann> |
| Component: | Core | Assignee: | Kent Johnson <kent_johnson> |
| Status: | VERIFIED FIXED | QA Contact: | |
| Severity: | normal | ||
| Priority: | P3 | ||
| Version: | 3.1 | ||
| Target Milestone: | 3.1 M6 | ||
| Hardware: | PC | ||
| OS: | Windows XP | ||
| Whiteboard: | |||
Extracting the Inner class outside of the interface I works fine. We do report an error. We should never end up adding a synthetic method on an interface. Since 1.4 only public methods from Object are visible to an interface Added test099 to Compliance_1_3/4/5 Verified in 20050330-0500 |
Compiling the following code and running it result in a ClassFormatError. Exception in thread "main" java.lang.ClassFormatError: Method access$0 in class I has illegal modifiers: 0x1008 at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:620) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124) at java.net.URLClassLoader.defineClass(URLClassLoader.java:260) at java.net.URLClassLoader.access$100(URLClassLoader.java:56) at java.net.URLClassLoader$1.run(URLClassLoader.java:195) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:188) at java.lang.ClassLoader.loadClass(ClassLoader.java:306) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:268) at java.lang.ClassLoader.loadClass(ClassLoader.java:251) at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319) at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:620) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124) at java.net.URLClassLoader.defineClass(URLClassLoader.java:260) at java.net.URLClassLoader.access$100(URLClassLoader.java:56) at java.net.URLClassLoader$1.run(URLClassLoader.java:195) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:188) at java.lang.ClassLoader.loadClass(ClassLoader.java:306) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:268) at java.lang.ClassLoader.loadClass(ClassLoader.java:251) at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319) interface I extends Cloneable { class Inner { Object bar(I i) { try { return i.clone(); } catch (CloneNotSupportedException e) { return null; } } } } public class X implements I { public static void main(String[] args) { } } Compiled with javac 1.5.0, this returns: X.java:5: cannot find symbol symbol : method clone() location: interface I return i.clone(); ^ 1 error jikes 1.22 reports: Found 1 semantic error compiling "C:/tests_sources/X.java": 5. return i.clone(); ^-------^ *** Semantic Error: The method "java.lang.Object clone() throws java.lang.CloneNotSupportedException;" only has protected access in "java.lang.Object" , so it is not accessible from an interface.