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From "Vladimir Ivanov (JIRA)" <j...@apache.org>
Subject [jira] Created: (HARMONY-1100) [classlib][io] compatibility: Harmony method DataOutputStream(null).writeBytes("") throws NPE while RI does not
Date Tue, 08 Aug 2006 09:03:14 GMT
[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 = java.io.DataOutputStream@1b3494
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 = java.io.DataOutputStream@13541354
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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