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  1. JDK
  2. JDK-4066275

within a for statement, blank final variable can be assigned twice

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Details

    • 1.2beta
    • sparc
    • solaris_2.5.1
    • Verified

    Description



      Name: laC46010 Date: 07/22/97



      All JDK versions from 1.1_Final thru 1.2C fail to pass
      test icls11608, generated from template icls11691.

      The test reveals that there's a way for a blank final variable
      to be assigned twice within a for statement. Nevertheless, Inner
      Classes In Java 1.1 specification states:

      "A blank final is final variable declaration (of any kind)
      which lacks an initializer. A blank final must be assigned an
      initial value, exactly once, before it is used."

      Example "Test.java" (see source code below) shows this failure:

      > /export/ld14/java/dest/jdk1.2/solaris/bin/javac -d . Test.java
      > /export/ld14/java/dest/jdk1.2/solaris/bin/java -verify Test
      a=1
      a=2
      a=3
      a=4
      >

      Note, that there is very similar (most likely the same) bug
      with ID 4030396, which concerns switch statement.

      --------------------Test.java----------------------
      public class Test {
          public static void main(String[] argv) {
           int k=0;
      for (final int a;;) {
      k++;
      a=k;
      System.out.println("a="+a);
      if (k>3)
      return;
      }
          }
      }
      --------------------------------------------------------------------------------

      ======================================================================

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            wmaddoxsunw William Maddox (Inactive)
            leosunw Leo Leo (Inactive)
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