java - How do you get AttributedCharacterIterator to return a run for a given Attribute? -

suppose assign custom characteriterator.attribute first 5 characters of ten-character string.

suppose further assign different characteriterator.attribute remaining characters.

why then, when call attributedstring.getrunstart(firstattribute) 0 (i expect this) , when call attributedstring.getrunstart(secondattribute) also 0?

here's setup code:

final attributedstring s = new attributedstring("sq3r9fffff"); final attribute baseid = new attribute("base id") {}; final attribute fs = new attribute("fff") {}; s.addattribute(baseid, "ignored", 0, 5); s.addattribute(fs, "whatever", 5, 10); final attributedcharacteriterator iterator = s.getiterator(); assertnotnull(iterator); 

and here's code outputs diagnostics:

for (char c = iterator.first(); c != done; c = iterator.next()) {   system.out.println("character: " + c);   system.out.println("character index: " + iterator.getindex());   system.out.println("attributes: " + iterator.getattributes());   system.out.println("start baseid: " + iterator.getrunstart(baseid));   system.out.println("limit baseid: " + iterator.getrunlimit(baseid));   system.out.println("start fs: " + iterator.getrunstart(fs));   system.out.println("limit fs: " + iterator.getrunlimit(fs)); } 

the output this:

 character: s  character index: 0  attributes: {com.foobar.collection.api.testcaseattributedstring$1(base id)=ignored}  start baseid: 0  limit baseid: 5  start fs: 0  limit fs: 5  character: q  character index: 1  attributes: {com.foobar.collection.api.testcaseattributedstring$1(base id)=ignored}  start baseid: 0  limit baseid: 5  start fs: 0  limit fs: 5  character: 3  character index: 2  attributes: {com.foobar.collection.api.testcaseattributedstring$1(base id)=ignored}  start baseid: 0  limit baseid: 5  start fs: 0  limit fs: 5  character: r  character index: 3  attributes: {com.foobar.collection.api.testcaseattributedstring$1(base id)=ignored}  start baseid: 0  limit baseid: 5  start fs: 0  limit fs: 5  character: 9  character index: 4  attributes: {com.foobar.collection.api.testcaseattributedstring$1(base id)=ignored}  start baseid: 0  limit baseid: 5  start fs: 0  limit fs: 5  character: f  character index: 5  attributes: {com.foobar.collection.api.testcaseattributedstring$2(fff)=whatever}  start baseid: 5  limit baseid: 10  start fs: 5  limit fs: 10  character: f  character index: 6  attributes: {com.foobar.collection.api.testcaseattributedstring$2(fff)=whatever}  start baseid: 5  limit baseid: 10  start fs: 5  limit fs: 10  character: f  character index: 7  attributes: {com.foobar.collection.api.testcaseattributedstring$2(fff)=whatever}  start baseid: 5  limit baseid: 10  start fs: 5  limit fs: 10  character: f  character index: 8  attributes: {com.foobar.collection.api.testcaseattributedstring$2(fff)=whatever}  start baseid: 5  limit baseid: 10  start fs: 5  limit fs: 10  character: f  character index: 9  attributes: {com.foobar.collection.api.testcaseattributedstring$2(fff)=whatever}  start baseid: 5  limit baseid: 10  start fs: 5  limit fs: 10 

note, in particular, last entry, reports "start" "baseid" 5. huh?

per javadoc:

a run respect attribute maximum text range which:

• the attribute undefined or null entire range, or
• the attribute value defined , has same non-null value entire range.

i think may first bullet point. characters 0-4, fs attribute undefined, it's valid range. baseid defined, , valid.

http://download.oracle.com/javase/1,5.0/docs/api/java/text/attributedcharacteriterator.html