code: private JSlider getSliderMaxDepth() {
  		if (sliderMaxDepth == null) {
  			sliderMaxDepth = new JSlider();
  			sliderMaxDepth.setMaximum(19);
  			sliderMaxDepth.setMinimum(0);
  			sliderMaxDepth.setMinorTickSpacing(1);
  			sliderMaxDepth.setPaintTicks(true);
  			sliderMaxDepth.setPaintLabels(true);
  			sliderMaxDepth.setName("");
  			sliderMaxDepth.setMajorTickSpacing(1);
  			sliderMaxDepth.setSnapToTicks(true);
  			sliderMaxDepth.setPaintTrack(true);
  		}
  		return sliderMaxDepth;
  	}
docs: This method initializes the slider for MaxDepth.
  
  @return the slider for max depth