qa8308212 water tank implementation

public class QA8308212 {
  protected static double capacity;
  protected double water;
  public QA8308212() {
    capacity = 100.;
    this.setWater(.0);
  }
  public void add(double water) {
    if (this.put(water)) { return; }
    System.out.println("OVERFLOW");
  }
  public double getWater() {
    return this.water;
  }
  protected boolean put(double water) {
    if (this.getWater() + water > capacity) {
      this.setWater(capacity);
      return false;
    }
    double addee = this.getWater();
    this.setWater(addee + water);
    return true;
  }
  protected void setWater(double water) {
    this.water = water;
  }
  @Override
  public String toString() {
    return "Tank: " + this.getWater();
  }
  public static void main(String[] args) {
    QA8308212 tank = new QA8308212();
    System.out.println(tank);
    tank.add(10.);
    System.out.println(tank);
    tank.add(20.);
    System.out.println(tank);
    tank.add(30.);
    System.out.println(tank);
    tank.add(100.);
    tank.add(200.);
    tank.add(300.);
    tank.add(400.);
    System.out.println(tank);
  }
}