FULL PRODUCT VERSION :
java version "1.5.0_01"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_01-b08)
Java HotSpot(TM) Server VM (build 1.5.0_01-b08, mixed mode)


ADDITIONAL OS VERSION INFORMATION :
Linux xxx 2.4.20-24.8smp #1 SMP Mon Dec 1 13:19:19 EST 2003 i686 i686 i386 GNU/Linux


A DESCRIPTION OF THE PROBLEM :
If a bulk CharBuffer.put(CharBuffer) is attempted from a wrapped CharSequence into a CharBuffer view of a direct ByteBuffer, a NullPointerException is thrown:

Exception in thread "main" java.lang.NullPointerException
        at java.nio.DirectCharBufferS.put(DirectCharBufferS.java:305)
        at java.nio.DirectCharBufferS.put(DirectCharBufferS.java:290)
        at StringWrapBug.main(StringWrapBug.java:10)


STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Run the attached program

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
I was expecting the program to exit successfully without producing any output.
ACTUAL -
The program threw a NullPointerException.

ERROR MESSAGES/STACK TRACES THAT OCCUR :
Exception in thread "main" java.lang.NullPointerException
        at java.nio.DirectCharBufferS.put(DirectCharBufferS.java:305)
        at java.nio.DirectCharBufferS.put(DirectCharBufferS.java:290)
        at StringWrapBug.main(StringWrapBug.java:10)

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
import java.nio.*;

public class StringWrapBug
{
  public static void main(final String[] args)
  {
    try {
      final CharBuffer source = CharBuffer.wrap("data");
      final ByteBuffer dest = ByteBuffer.allocateDirect(8);
      dest.asCharBuffer().put(source);
    }
    catch (final UnsupportedOperationException xx) {
      // CharBuffer.put(CharBuffer) is an optional operation,
      // so this is allowed
    }
  }
}
---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
Catch both UnsupportedOperationException and NullPointerException when calling the optional CharBuffer.put(CharBuffer) method, and treat them identically.
###@###.### 2005-03-01 11:38:08 GMT