java - how can I find default attributes for JTextPane document? -

i'm working jtextpane.

jtextpane pane = new jtextpane(); string content = "i'm line of text displayed in jtextpane"; styleddocument doc = pane.getstyleddocument(); simpleattributeset aset = new simpleattributeset(); 

if add aset textpane's document this:

doc.setparagraphattributes(0, content.length(), aset, false); 

nothing visible happens. no big surprise since haven't set custom attributes aset. however, if allow aset replace current paragraphattributes of doc this:

doc.setparagraphattributes(0, content.length(), aset, true); 

a lot of things happen. how can information on default values of jtextpane document? particularly problems when i'm defining custom font aset , set replace current attributes, font displayed if bold. styleconstants.setbold(aset, false); doesn't help.

i have looked @ source code see data structures holding information want. modification of code prints attributes each paragraph.

int offset, length; //the value of first 2 parameters in setparagraphattributes() call  element section = doc.getdefaultrootelement(); int index0 = section.getelementindex(offset); int index1 = section.getelementindex(offset + ((length > 0) ? length - 1 : 0)); (int = index0; <= index1; i++) {     element paragraph = section.getelement(i);     attributeset attributeset = paragraph.getattributes();     enumeration keys = attributeset.getattributenames();     while (keys.hasmoreelements())     {         object key = keys.nextelement();         object attribute = attributeset.getattribute(key);         //system.out.println("key = " + key); //for other attributeset classes line useful because shows actual parameter, "bold"         system.out.println(attribute.getclass());         system.out.println(attribute);     } } 

the output simple textpane text added through settext() method gives:

class javax.swing.text.stylecontext$namedstyle namedstyle:default {foreground=sun.swing.printcoloruiresource[r=51,g=51,b=51],size=12,italic=false,name=default,bold=false,font_attribute_key=javax.swing.plaf.fontuiresource[family=dialog,name=dialog,style=plain,size=12],family=dialog,} 

about particular problem, looking @ related question have been able set text of paragraph bold with:

stylecontext sc = stylecontext.getdefaultstylecontext(); attributeset aset = sc.addattribute(aset,  styleconstants.bold,  true); 

in case class of aset javax.swing.text.stylecontext$smallattributeset not mutable (does not implement mutableattributeset). case along lines:

aset.addattribute(styleconstants.bold, true); 

should work.