I suggest follow RI for this case. Because spec says nothing about NPE in
DataOutputStream(OutputStream) constructor, and following spec may cause
legacy applications broken. Furthermore, RI's behaviour is acceptable this
time. :)
On 8/8/06, Vladimir Ivanov <[EMAIL PROTECTED]> wrote:
I need a consultation: should we follow RI or spec in the case of issue
1100?
Thanks, Vladimir
On 8/8/06, Vladimir Ivanov (JIRA) <[EMAIL PROTECTED]> wrote:
>
> [classlib][io] compatibility: Harmony method
> DataOutputStream(null).writeBytes("") throws NPE while RI does not
>
>
---------------------------------------------------------------------------------------------------------------
>
> Key: HARMONY-1100
> URL: http://issues.apache.org/jira/browse/HARMONY-1100
> Project: Harmony
> Issue Type: Bug
> Components: Classlib
> Reporter: Vladimir Ivanov
>
>
> The spec says for the java.io package: "Unless otherwise noted, passing
a
> null argument to a constructor or method in any class or interface in
this
> package will cause a NullPointerException to be thrown".
> and says nothing about 'null' for DataOutputStream constructor.
> So, according to spec the DataOutputStream(null) should lead to the NPE
> instead of writeBytes but according to RI no NPE for constructor and
> zero-length string for writeBytes.
>
> =================== test.java =========================
> import java.io.DataOutputStream;
>
> public class test {
> public static void main(String args[]) throws Exception {
> System.out.println("res = " + new DataOutputStream(null));
> new DataOutputStream(null).writeBytes("");
> System.out.println("OK");
> }
> }
> ===================================================
>
> Output:
> C:\tmp\tmp17>C:\jrockit-jdk1.5.0-windows-ia32\bin\java.exe -cp .
> -showversion test
> java version "1.5.0"
> Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0-b64)
> BEA WebLogic JRockit(R) (build dra-38972-20041208-2001-win-ia32,
> R25.0.0-75, GC: System optimized over throughput (initial strategy
> singleparpar))
>
> res = [EMAIL PROTECTED]
> OK
>
> C:\tmp\tmp17>C:\harmony\trunk_0427\deploy\jdk\jre\bin\java.exe -cp .
> -showversion test
> java version 1.5 (subset)
>
> (c) Copyright 1991, 2006 The Apache Software Foundation or its
licensors,
> as applicable.
> res = [EMAIL PROTECTED]
> Exception in thread "main" java.lang.NullPointerException
> at java.io.DataOutputStream.writeBytes(DataOutputStream.java:163)
> at test.main(test.java:6)
>
>
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--
Andrew Zhang
China Software Development Lab, IBM
