java - Apache POI Word using custom styles for titles -

i trying create heading titles in word (.docx) document, using apache-poi.

i have template contains custom styles , example of heading titles using custom styles.

xwpfdocument document=new xwpfdocument(new fileinputstream("template.docx")); 

my custom style called "custom_ynp" (i created directly in word), when use line below, returns false

document.getstyles().styleexist("custom_ynp") 

and, of course, when try use style, doesn't work, print string in "normal" style

xwpfparagraph paragraph=document.createparagraph(); paragraph.setstyle("custom_ynp"); xwpfrun run=paragraph.createrun(); run.settext("test"); 

just record, "save document" line :

document.write(new fileoutputstream("mydoc.docx")); 

i have read question, can't find solution problem... how can use predefined formats in docx poi?

edit : works if create own style using apache-poi.... still woudl use existing styles word document.

a *.docx zip archive. can unzip , /word/styles.xml. there see w:styleid="customynp" without underscore. name "custom_ynp" <w:name w:val="custom_ynp"/>. so:

  xwpfdocument document = new xwpfdocument(new fileinputstream("template.docx"));    system.out.println(document.getstyles().styleexist("customynp"));   system.out.println(document.getstyles().getstyle("customynp").getname());    xwpfparagraph paragraph=document.createparagraph();   paragraph.setstyle("customynp");   xwpfrun run=paragraph.createrun();   run.settext("test");    document.write(new fileoutputstream("mydoc.docx"));   document.close();