java - libgdx scene2d add multi table -

i try table on bottom screen. first added 2 table on root table. every table has 4 cells.
code. how can this. code not work.

    table table = new table();             table.bottom();     table.setfillparent(true);      table table1 = new table();     table1.setfillparent(true);      table table2 = new table();     table2.setfillparent(true);             .             .             .      table2.add(image1).size(image1.getwidth(), image1.getheight());     table3.add(image2).size(image2.getwidth(), image2.getheight());     table3.add(image3).size(image3.getwidth(), image3.getheight());     table3.add(image4).size(image4.getwidth(), image4.getheight());     table3.add(image5).size(image5.getwidth(), image5.getheight());     table2.add(table3);     table2.row();     table2.add(image6).size(image6.getwidth(), image6.getheight());     table2.add(image7).size(image7.getwidth(), image7.getheight());     table2.add(image8).size(image8.getwidth(), image8.getheight());     table2.add();     table1.add(table2);     table.add(table1).expandx();      table5.add(image9).size(image9.getwidth(), image9.getheight());     table6.add(image10).size(image10.getwidth(), image10.getheight());     table6.add(image11).size(image11.getwidth(), image11.getheight());     table6.add(image12).size(image12.getwidth(), image12.getheight());     table6.add(image13).size(image13.getwidth(), image13.getheight());     table5.add(table6);     table5.row();     table5.add(image6).size(image6.getwidth(), image6.getheight());     table5.add(image7).size(image7.getwidth(), image7.getheight());     table5.add(image8).size(image8.getwidth(), image8.getheight());     table5.add();     table4.add(table5);     table.add(table4).expandx(); 

for each of 2 root tables, make 4x2 table, first cell spans 3 columns, , second cell contains 1 inner table 4 cells.

i use helper methods possible cut down on redundancy make easier tweak. try starting (untested):

private static cell addsizedimage(table table, image image){     return table.add(image).size(image.getwidth(), image.getheight()); }  private static table generateblock (image... imgs){     if (imgs.length != 8) throw new unsupportedoperationexception("must have 8 images");     table root = new table();     addsizedimage(root, imgs[0]).colspan(3);      table innertable = new table();     addsizedimage(innertable, imgs[1]);     addsizedimage(innertable, imgs[2]).row();     addsizedimage(innertable, imgs[3]);     addsizedimage(innertable, imgs[4]);      root.add(innertable).row();      addsizedimage(root, imgs[5]);     addsizedimage(root, imgs[6]);     addsizedimage(root, imgs[7]);      return root; }  private table createimagesui (){     table root = new table();     root.setfillparent(true);     root.bottom();      root.add(generateblock(image1, image2, image3, image4, image5, image6, image7, image8)).expandx();     root.add(generateblock(image9, image10, image11, image12, image13, image14, image15, image16)).expandx();      return root; }