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  1. JDK
  2. JDK-6754167

IllegalAccessException thrown for successfully compiled and self-contained code

    Details

    • Type: Bug
    • Status: Closed
    • Priority: P4
    • Resolution: Duplicate
    • Affects Version/s: 6
    • Fix Version/s: None
    • Component/s: tools
    • Labels:
    • Subcomponent:
    • CPU:
      x86
    • OS:
      windows_xp

      Description

      FULL PRODUCT VERSION :
      java version "1.6.0_01"
      Java(TM) SE Runtime Environment (build 1.6.0_01-b06)
      Java HotSpot(TM) Client VM (build 1.6.0_01-b06, mixed mode, sharing)

      ADDITIONAL OS VERSION INFORMATION :
      Microsoft Windows XP [Version 5.1.2600]

      A DESCRIPTION OF THE PROBLEM :
      When a call is made to a method that is specified in an interface and is implemented in a subclass of the current abstract type, and a private method with the same signature exists in a superclass, the code compiles without errors but the method call causes an IllegalAccessException at runtime. According to the JLS, the private method in the superclass is "not inherited", so I expect the correct behavior would be to invoke the subclass method.


      STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
      Compile and run the program.

      EXPECTED VERSUS ACTUAL BEHAVIOR :
      EXPECTED -
      Expect "2" to be printed to standard out.
      ACTUAL -
      An IllegalAccessException is thrown.

      ERROR MESSAGES/STACK TRACES THAT OCCUR :
      Exception in thread "main" java.lang.IllegalAccessError: tried to access method A1.getI()I from class A2
      at A2.test(AccessBug.java:23)
      at AccessBug.main(AccessBug.java:3)


      REPRODUCIBILITY :
      This bug can be reproduced always.

      ---------- BEGIN SOURCE ----------
      ----------------AccessBug.java-----------------
      public class AccessBug {
         public static void main(String[] args) {
            new A3().test();
         }
      }

      class A1 {
         private int getI() {
            return 1;
         }
      }

      interface I1 {
         int getI();
      }

      abstract class A2 extends A1 implements I1 {
         public void test() {
            // I expect this should print "2". According to the
          // JLS A1.getI() is "not inherited" by A2, so I guess
          // it should not affect method resolution. Instead,
          // an IllegalAccessError is thrown at runtime.
            System.out.println(getI());
         }
      }

      class A3 extends A2 {
         public int getI() {
            return 2;
         }
      }
      ------------------------------------------
      ---------- END SOURCE ----------

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              • Assignee:
                Unassigned
                Reporter:
                ndcosta Nelson Dcosta
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                • Created:
                  Updated:
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