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  1. JDK
  2. JDK-1228387

Cannot call base class private protected function from derived class

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    Details

    • Subcomponent:
    • Resolved In Build:
      1.0beta2
    • CPU:
      x86
    • OS:
      windows_nt
    • Verification:
      Verified

      Description

      Cannot call a base class private protected (protected private) member function. When you
      compile, you receive compiler error message:

      No method matching (function signature) found in (base class).

      Steps to reproduce
      Compile the following code


      /* Access modifier tests
       * This tests same package access modifiers for member functions
       */

      class AccessTest
      {
          public static void main(String args[])
          {
             //
             BaseClass baseClass = new BaseClass();
             baseClass.func("Kevin");
             
             // this should be okay
             baseClass.protectFunc("Arthur");

             // this should generate a compiler error
      // baseClass.privFunc("Frank");

             // this should generate a compiler error
      // baseClass.privProtectFunc("Jim");

             // now lets try this with a derived class
             DerivedClass derivedClass = new DerivedClass();
             derivedClass.func("Eric");

          }

      }

      class BaseClass
      {
          public void func(String s)
          {
             System.out.println("BaseClass.func() " + s);
          }

          protected void protectFunc(String s)
          {
             System.out.println("BaseClass.protectFunc() " + s);
          }

          private void privFunc(String s)
          {
             System.out.println("BaseClass.privFunc() " + s);
          }

          // this syntax should limit other functions in the default
          // package from calling this function, but allow
          // derived classes to call it.
          private protected void privProtectFunc(String s)
          {
             System.out.println("BaseClass.privProtectFunc() " + s);
          }
          
          // This should behave the same as private protected
          protected private void protectPrivFunc(String s)
          {
             System.out.println("BaseClass.protectPrivFunc() " + s);
          }
      }


      class DerivedClass extends BaseClass
      {
          public void func(String s)
          {
             // both of these two function calls should work
             super.privProtectFunc("DerivedClass.func() " + s);
             super.protectPrivFunc("DerivedClass.func() " + s);
          }

      }





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            Assignee:
            fyellinsunw Frank Yellin (Inactive)
            Reporter:
            kasmithsunw Kevin Smith (Inactive)
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              Updated:
              Resolved:
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