Assignment 4: Dashboard Comparable

public class Dashboard implements Comparable
{

   private int odometer;
   private int speedometer;
   private boolean checkEngine;

   public Dashboard()
   {
       odometer = 0;
       speedometer = 0;
       checkEngine = false;
   }
    public Dashboard(int milesTravelled, int speed)
   {
     boolean checkMiles = false;
     boolean checkSpeed = false;

     if(milesTravelled >= 0 && milesTravelled <= 99999)
     {
       odometer = milesTravelled;
       checkMiles = true;
     }
     else
     {
       odometer = 0;
     }

     if(speed >= 0 && speed <= 100)
     {
       speedometer = speed;
       checkSpeed = true;
     }
     else
     {
       speedometer = 0;
     }

     if(checkMiles == true && checkSpeed == true)
     {
         checkEngine = false;
     }
     else
     {
         checkEngine = true;
     }

   }

   public void accelerate()
   {
     this.speedometer++;
     if(this.speedometer > 100)
     {
       this.speedometer = 0;
       this.checkEngine = true;
     }
   }
    public void drive(int numMinutes)
   {
     double mph = (double)this.speedometer/60;
     double totalMiles = mph * numMinutes;
     this.odometer += (int)totalMiles;
     if(this.odometer > 99999)
     {
       this.odometer = 0;
       this.checkEngine = true;
     }

   }


  public String toString() {
       String ret = "Speedometer: " + speedometer + " MPH";
       ret += "\nOdometer: " + String.format("%05d", odometer);
       if(checkEngine) {
           ret += "\nCheck Engine: On";
       } else {
           ret += "\nCheck Engine: Off";
       }
       return ret;
   }


   public int compareTo(Object other)
   {
     Dashboard temp = (Dashboard) other;
     int prt = 0;

     if(this.odometer < temp.odometer)
     {
       prt = -1;
     }
     else if(this.odometer > temp.odometer)
     {
       prt = 1;
     }
     else if(this.odometer == temp.odometer)
     {
       if(this.speedometer < temp.speedometer)
       {
         prt = -1;
       }
       else if(this.speedometer > temp.speedometer)
       {
         prt = 1;
       }
       else if(this.speedometer == temp.speedometer)
       {
         if(this.checkEngine == false && temp.checkEngine == true)
         {
           prt = -1;
         }
         else if(this.checkEngine == true && temp.checkEngine == false)
         {
           prt = 1;
         }
         else if(this.checkEngine == true && temp.checkEngine == true)
         {
           prt = 0;
         }
       }
     }

     return prt;
   }


   public String race(Dashboard other, int acc1, int acc2)
   {
     Dashboard temp2 = (Dashboard)other;
     String prt = "";
     int a = acc1;
     int b = acc2;

     for(int c = 0; c < acc1; c++)
     {
       this.accelerate();
     }
     for(int d = 0; d < acc2; d++)
     {
       temp2.accelerate();
     }

     if(this.checkEngine == true && temp2.checkEngine == false)
     {
       prt = "First car stalled out!\n\n" + this.toString() + "\n\n" + temp2.toString() + "\n\nCar 2 has won the race!";
     }

     else if(this.checkEngine == false && temp2.checkEngine == true)
     {
       prt = "Second car stalled out!\n\n" + this.toString() + "\n\n" + temp2.toString() + "\n\nCar 1 has won the race!";
     }

     else if(this.checkEngine == false && temp2.checkEngine == false)
     {
       if(this.speedometer > temp2.speedometer)
       {
         prt = "\n" + this.toString() + "\n\n" + temp2.toString() + "\n\nCar 1 has won the race!";
       }
       else if(this.speedometer == temp2.speedometer)
       {
         prt = "\n" + this.toString() + "\n\n" + temp2.toString() + "\n\nIt's a tie!";
       }
       else if(this.speedometer < temp2.speedometer)
       {
         prt = "\n" + this.toString() + "\n\n" + temp2.toString() + "\nCar 2 has won the race!";
       }
     }
     else if(this.checkEngine == true && temp2.checkEngine == true)
     {
       prt = "First car stalled out! \nSecond car stalled out!\n\n" + this.toString() + "\n\n" + temp2.toString() + "\n\nIt's a tie!";
     }

     return prt;
   }


   public String difference(Dashboard other)
   {
     Dashboard temp3 = (Dashboard) other;
     String prt = "";
     int time = 0;
     double difference = Math.abs(this.odometer - temp3.odometer);

     if(this.odometer > temp3.odometer)
     {
       return "Second car will need to drive for " + (int)((double)difference / ((double)temp3.speedometer / 60)) + " minutes to catch first car.";
     } else {
       return "First car will need to drive for " + (int)((double)difference / ((double)this.speedometer / 60)) + " minutes to catch second car.";
     }
   }


}