/** Adds Demo buttons on Main Menu for players who are playing Demo. */ private void addDemoButtons(int par1, int par2) { buttonList.add(new GuiButton(11, width / 2 - 100, par1, I18n.func_135053_a("menu.playdemo"))); buttonList.add( buttonResetDemo = new GuiButton( 12, width / 2 - 100, par1 + par2 * 1, I18n.func_135053_a("menu.resetdemo"))); ISaveFormat isaveformat = mc.getSaveLoader(); WorldInfo worldinfo = isaveformat.getWorldInfo("Demo_World"); if (worldinfo == null) { buttonResetDemo.enabled = false; } }