No idea what I'm doing wrong

These GoKarts have a single rechargeable battery that have a display of bars to measure its energy level. Each battery has a maximum of 8 bars.

For this task, let's add a constant field to the class that stores the maximum number of energy bars. Make sure the field cannot be changed and is accessible from the class, not just the instance. Use the naming convention we learned.

I have no idea what I'm doing wrong. It tells me to make mBarCount public, but I know that doing so is incorrect. I have tried making it public, but doing that leads to a nonsensical compiler error. Help me TreeHouse forums, you're my only hope.

public class GoKart {
  public static final int MAX_BARS = 8;
  private String mColor;
  private int mBarCount;

  public GoKart(String color) {
    mColor = color;
    mBarCount = 0;
  }

  public void load() {
    mBarCount = MAX_BARS;
  }

  public String getColor() {
    return mColor;
  } 
}