java - How to render Paragraph in vertical cell in itext7? -

i want build table headers in itext7. :

here code :

package utils;    import datamodels.ishvaxtidata; import com.itextpdf.io.font.fontconstants; import com.itextpdf.kernel.color.color; import com.itextpdf.kernel.events.event; import com.itextpdf.kernel.events.ieventhandler; import com.itextpdf.kernel.events.pdfdocumentevent; import com.itextpdf.kernel.font.pdffont; import com.itextpdf.kernel.font.pdffontfactory; import com.itextpdf.kernel.geom.pagesize; import com.itextpdf.kernel.geom.rectangle; import com.itextpdf.kernel.pdf.pdfdocument; import com.itextpdf.kernel.pdf.pdfname; import com.itextpdf.kernel.pdf.pdfnumber; import com.itextpdf.kernel.pdf.pdfwriter; import com.itextpdf.kernel.pdf.canvas.pdfcanvas; import com.itextpdf.kernel.pdf.canvas.pdfcanvasconstants; import com.itextpdf.kernel.pdf.xobject.pdfformxobject; import com.itextpdf.layout.canvas; import com.itextpdf.layout.document; import com.itextpdf.layout.style; import com.itextpdf.layout.border.border; import com.itextpdf.layout.element.*; import com.itextpdf.layout.layout.layoutarea; import com.itextpdf.layout.layout.layoutcontext; import com.itextpdf.layout.layout.layoutresult; import com.itextpdf.layout.property.*; import com.itextpdf.layout.renderer.cellrenderer; import com.itextpdf.layout.renderer.drawcontext; import com.itextpdf.layout.renderer.irenderer; import com.itextpdf.layout.renderer.tablerenderer; import com.itextpdf.signatures.pdfsignatureappearance;   import java.io.file; import java.io.ioexception; import java.util.list;  public class test {      private static string file = "c:/codes/java/firstpdf.pdf";      public static int header_font_size = 8;     public static int sub_header_font_size = 8;      public static void main(string[] args) throws exception{         pishvaxtitopdf(null,file,"",2,2);         //test test2 = new test();         //test2.manipulatepdf(file);     }        public static void pishvaxtitopdf(list<ishvaxtidata> list,  string dest, string name , int year, int month) throws exception{         pdfdocument pdfdocument = new pdfdocument(new pdfwriter(dest));         document document = new document(pdfdocument,pagesize.a4.rotate());         pdffont pdffont = pdffontfactory.createfont("c:\\windows\\fonts\\arial.ttf", "identity-h", true);          int g = 2;          table table =                 new table( new float[]{                         g,g,g,                         g,g,g,g,g, g,g,g,g,g, g,g,g,g,g,                         g,g,g,g,g, g,g,g,g,g, g,g,g,g,g,                         g,g,g,g,g, g,g,g,g                  } );         //table.setkeeptogether(true);         //table.setheight(700);         table.setwidthpercent(100);         cell cell;          //sira nomresi;         cell = new cell(2,1);         cell.add( new paragraph(constants.pishvaxti.n).setrotationangle(1.5707963268) );         cell.setfontsize(header_font_size);         cell.settextalignment(textalignment.center);         cell.setverticalalignment(verticalalignment.middle);         cell.sethorizontalalignment(horizontalalignment.center);         table.addheadercell(cell);          // soyadi adi atasinin adi         cell = new cell(2,1);         cell.add( new paragraph(constants.pishvaxti.adsoyad).setfont(pdffont) );         cell.setfontsize(header_font_size);         cell.settextalignment(textalignment.center);         cell.setverticalalignment(verticalalignment.middle);         cell.sethorizontalalignment(horizontalalignment.center);         table.addheadercell(cell);          //ixtisas         cell = new cell(2,1);         cell.add( new paragraph(constants.pishvaxti.vezifesi).setfont(pdffont) );         cell.setfontsize(8);         cell.settextalignment(textalignment.center);         cell.setverticalalignment(verticalalignment.middle);         cell.sethorizontalalignment(horizontalalignment.center);         table.addheadercell(cell);          //ayin gunleri         cell = new cell(1,30);         cell.add( new paragraph(constants.pishvaxti.ayingunleri).setfont(pdffont) );         cell.setfontsize(header_font_size);         cell.settextalignment(textalignment.center);         cell.setverticalalignment(verticalalignment.middle);         cell.sethorizontalalignment(horizontalalignment.center);         table.addheadercell(cell);           //faktikiishecixma         cell = new cell(2,1);         paragraph paragraph = new paragraph(constants.pishvaxti.faktikiishecixma)                 .setfont(pdffont).setrotationangle(1.5707963268)                 //.setverticalalignment(verticalalignment.bottom)         ;         cell.add(                 paragraph         );          cell.setfontsize(sub_header_font_size);         cell.settextalignment(textalignment.center);         cell.setverticalalignment(verticalalignment.bottom);         cell.sethorizontalalignment(horizontalalignment.center);         cell.setmargins(0,0,0,0).setpaddings(0,0,0,0);         table.addheadercell(cell);            //ishecixmagunleri         cell = new cell(1,4);         cell.add( new paragraph(constants.pishvaxti.ishecixmamagunleri).setfont(pdffont) );         cell.setfontsize(header_font_size);         cell.settextalignment(textalignment.center);         cell.setverticalalignment(verticalalignment.middle);         cell.sethorizontalalignment(horizontalalignment.center);         table.addheadercell(cell);           //bayramveistirahet         cell = new cell(2,1);         cell.add( new paragraph(constants.pishvaxti.bayramveistirahet).setfont(pdffont).setrotationangle(1.5707963268) );         cell.setfontsize(sub_header_font_size);         cell.settextalignment(textalignment.center);         cell.setverticalalignment(verticalalignment.middle);         cell.sethorizontalalignment(horizontalalignment.center);         table.addheadercell(cell);          //ishlenmishsaatlar         cell = new cell(1,3);         cell.add( new paragraph(constants.pishvaxti.ishlenmishsaatlar).setfont(pdffont) );         cell.setfontsize(header_font_size);         cell.settextalignment(textalignment.center);         cell.setverticalalignment(verticalalignment.middle);         cell.sethorizontalalignment(horizontalalignment.center);         table.addheadercell(cell);            //ayingunleri         for(int = 1; <= 30 ; ++i){             cell = new cell(1,1);             cell.add( new paragraph( string.valueof(i + "") ).setfont(pdffont) );             cell.setfontsize(header_font_size);             cell.settextalignment(textalignment.center);             cell.setverticalalignment(verticalalignment.bottom);             cell.sethorizontalalignment(horizontalalignment.center);             table.addheadercell(cell);         }          //xestelik         cell = new cell(1,1);         cell.add( new paragraph(constants.pishvaxti.xestelik).setfont(pdffont).setrotationangle(1.5707963268) );         cell.setfontsize(sub_header_font_size);         cell.settextalignment(textalignment.center);         cell.setverticalalignment(verticalalignment.bottom);         cell.sethorizontalalignment(horizontalalignment.center);         table.addheadercell(cell);          //rehberliyinicazesi         cell = new cell(1,1);         cell.add( new paragraph(constants.pishvaxti.rehberinicazesi  ).setfont(pdffont).setrotationangle(1.5707963268) );         cell.setfontsize(sub_header_font_size);         cell.settextalignment(textalignment.center);         cell.setverticalalignment(verticalalignment.bottom);         cell.sethorizontalalignment(horizontalalignment.center);         table.addheadercell(cell);          //ozhesabina         cell = new cell(1,1);         cell.add( new paragraph(constants.pishvaxti.ozhesabina).setfont(pdffont).setrotationangle(1.5707963268) );         cell.setfontsize(sub_header_font_size);         cell.settextalignment(textalignment.center);         cell.setverticalalignment(verticalalignment.bottom);         cell.sethorizontalalignment(horizontalalignment.center);         table.addheadercell(cell);           //mezuniyyet         cell = new cell(1,1);         cell.add( new paragraph(constants.pishvaxti.mezuniyyet).setfont(pdffont).setrotationangle(1.5707963268) );         cell.setfontsize(sub_header_font_size);         cell.settextalignment(textalignment.center);         cell.setverticalalignment(verticalalignment.bottom);         cell.sethorizontalalignment(horizontalalignment.center);         table.addheadercell(cell);          //cemi         cell = new cell(1,1);         cell.add( new paragraph(constants.pishvaxti.cemi).setfont(pdffont).setrotationangle(1.5707963268) );         cell.setfontsize(sub_header_font_size);         cell.settextalignment(textalignment.center);         cell.setverticalalignment(verticalalignment.bottom);         cell.sethorizontalalignment(horizontalalignment.center);         table.addheadercell(cell);          //ishvaxtinaelave         cell = new cell(1,1);         cell.add( new paragraph(constants.pishvaxti.ishvaxtinaelave).setfont(pdffont).setrotationangle(1.5707963268) );         cell.setfontsize(sub_header_font_size);         cell.settextalignment(textalignment.center);         cell.setverticalalignment(verticalalignment.bottom);         cell.sethorizontalalignment(horizontalalignment.center);         table.addheadercell(cell);          //1.15         cell = new cell(1,1);         cell.add( new paragraph(constants.pishvaxti.birondabesh).setfont(pdffont).setrotationangle(1.5707963268) );         cell.setfontsize(sub_header_font_size);         cell.settextalignment(textalignment.center);         cell.setverticalalignment(verticalalignment.bottom);         cell.sethorizontalalignment(horizontalalignment.center);         table.addheadercell(cell);          //table.setmarginleft(0);           document.setleftmargin(0);         table.getheader().setheight(100);         //table.getheader().setwidth(100);          system.out.println(  table.getheader().getwidth() );         //system.out.println( document.getwidth() );         document.add(table);         document.close();      }    } 

result :

paragraphs vertical have multiple lines. need single line paragraphs in first image. other problem there more empty space in vertical cell need. tried set padding , margin of cell , paragraph zero. have no effect