![]() ![]() So, there’s a solution (hack) that works on Java 8 but not on 9 or 10, and there’s a solution that works on Java 9 and 10, but not on Java 8. Great, it works in Java 9 and 10, what about Java 8?Ĭaused by: : no private access for invokespecial: interface Duck, from ProxyDemoĪt $Lookup.findSpecial(MethodHandles.java:1002) One of the Jigsaw project’s goals is to precisely not allow such hacks to persist. If we run the program with the -illegal-access=deny flag:Įxception in thread "main" : Unable to make $Lookup() accessible: module java.base does not "opens " to unnamed module java.base/.checkCanSetAccessible(AccessibleObject.java:337)Īt java.base/.checkCanSetAccessible(AccessibleObject.java:281)Īt java.base/.checkCanSetAccessible(Constructor.java:192)Īt java.base/.setAccessible(Constructor.java:185) WARNING: All illegal access operations will be denied in a future release ![]() WARNING: Use -illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: Please consider reporting this to the maintainers of ProxyDemo WARNING: Illegal reflective access by ProxyDemo (file:/C:/Users/lukas/workspace/playground/target/classes/) to constructor $Lookup() WARNING: An illegal reflective access operation has occurred When googling further, we might find the following solution, which accesses MethodHandles.Lookup‘s internals through reflection: We get the following IllegalAccessException:Ĭaused by: : no private access for invokespecial: interface Duck, from Duck/packageĪt .makeAccessException(MemberName.java:850)Īt $Lookup.checkSpecialCaller(MethodHandles.java:1572)Īt $Lookup.unreflectSpecial(MethodHandles.java:1231)īummer. The almost same code snippet no longer works. So, the original Google search turned up results that indicate we need to use the MethodHandles API. You simply cannot do this):Įxception in thread "main" Ĭaused by: Īt 0(Native Method)Īt (NativeMethodAccessorImpl.java:62)Īt (DelegatingMethodAccessorImpl.java:43)Īt .invoke(Method.java:498)Ĭaused by: Thread.currentThread().getContextClassLoader(),īut this will just generate a long long stack trace of nested exceptions (this isn’t specific to the method being a default method. Duck duck = (Duck) Proxy.newProxyInstance( ![]()
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