RFR [XXS] 8130646: JCK test api/java_io/StringWriter/index_SWWrite5Test start failing after JDK-8077242

[Ivan Gerasimov]

Hi!

With the fix for JDK-8077242 ((str) Optimize 
AbstractStringBuilder.append(CharSequence, int, int) for String 
argument) a change in behavior was introduced.

In the places, where sb.append(str.substring(from, to)) used to be 
called, in the case of wrong indices StringIndexOutOfBoundsException was 
thrown.
Now, after I replaced the code to sb.append(str, from, to), in such 
cases IndexOutOfBoundsException is thrown.

The proposal is to make AbstractStringBuilder.append(CharSequence, int, 
int) throw more specific StringIndexOutOfBoundsException, which
1) will eliminate the regression,
2) will be more consistent with most other methods of 
AbstractStringBuilder, which throw StringIndexOutOfBoundsException.

BUGURL: https://bugs.openjdk.java.net/browse/JDK-8130646
WEBREV: http://cr.openjdk.java.net/~igerasim/8130646/00/webrev/

Sincerely yours,
Ivan