FULL PRODUCT VERSION :
java version "1.6.0_02"
Java(TM) SE Runtime Environment (build 1.6.0_02-b05)
Java HotSpot(TM) Client VM (build 1.6.0_02-b05, mixed mode, sharing)

ADDITIONAL OS VERSION INFORMATION :
XP SP2 and Windows Vista

A DESCRIPTION OF THE PROBLEM :
Character encoder IBM970 throws a BufferOverflowException.

ACTUAL -
Throws a BufferOverflowException.

ERROR MESSAGES/STACK TRACES THAT OCCUR :
Exception in thread "main" java.nio.BufferOverflowException
        at java.nio.charset.CoderResult.throwException(CoderResult.java:259)
        at java.lang.StringCoding$StringEncoder.encode(StringCoding.java:242)
        at java.lang.StringCoding.encode(StringCoding.java:272)
        at java.lang.String.getBytes(String.java:947)
        at EncErr1.main(EncErr1.java:11).

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
import java.io.*;
import java.nio.charset.*;
import java.util.*;
public class EncErr1 {
    public static void main(String[] args){
        for (int c = Character.MIN_VALUE; c <= Character.MAX_VALUE; c++){
            if (!Character.isDefined((char)c)) continue;
            String s = String.valueOf((char)c);
            byte[] bb = null;
            try {
                bb = s.getBytes("x-IBM970");
            } catch (InternalError tr){
                continue;
            } catch (UnsupportedEncodingException th){
            }
        }
    }
}
---------- END SOURCE ----------