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  1. JDK
  2. JDK-5045611

Please warn about implicit narrowing casts.

    Details

    • Subcomponent:
    • Understanding:
      Cause Known
    • CPU:
      x86
    • OS:
      linux

      Description

      Name: rmT116609 Date: 05/11/2004


      FULL PRODUCT VERSION :
      java version "1.4.2_04"
      Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.2_04-b05)
      Java HotSpot(TM) Client VM (build 1.4.2_04-b05, mixed mode)

      ADDITIONAL OS VERSION INFORMATION :
      Linux pali 2.4.20-30.9 #1 Wed Feb 4 20:44:26 EST 2004 i686 i686 i386 GNU/Linux


      A DESCRIPTION OF THE PROBLEM :
      The following code does not produce a compile time warning regarding precision.

      int i=2;
      double d = 2.5;

      i*=d;

      EXPECTED VERSUS ACTUAL BEHAVIOR :
      EXPECTED -
      Expect the same compile time warning as i=i*d;

      Test.java:6: possible loss of precision
      found : double
      required: int
              i=d;
                ^
      Test.java:7: possible loss of precision
      found : double
      required: int
              i=i*d;
                 ^
      Test.java:8: possible loss of precision
      found : double
      required: int
              i*=d;
                 ^
      3 errors

      ACTUAL -

      Test.java:6: possible loss of precision
      found : double
      required: int
              i=d;
                ^
      Test.java:7: possible loss of precision
      found : double
      required: int
              i=i*d;

      2 errors

      REPRODUCIBILITY :
      This bug can be reproduced always.

      ---------- BEGIN SOURCE ----------
      public class Test {
          public void main (String [] args) {
              int i = 1;
              double d = 20.5;
                                                                                                                   
              i=d;
              i=i*d;
              i*=d;
          }
      }
      ---------- END SOURCE ----------
      (Incident Review ID: 246582)
      ======================================================================

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            • Assignee:
              Unassigned
              Reporter:
              rmandalasunw Ranjith Mandala (Inactive)
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