RaceTimer.java

package com.dronecontrol.leapcontrol.helpers;

import java.util.Date;

public class RaceTimer
{
  private Date startTime;

  private Date endTime;

  private boolean stopped = true;

  public void start()
  {
    if (stopped)
    {
      stopped = false;
      startTime = new Date();
      endTime = null;
    }
  }

  public void stop()
  {
    if (!stopped)
    {
      stopped = true;
      endTime = new Date();
    }
  }

  public long getElapsedTime()
  {
    if (startTime == null)
    {
      return 0;
    } else if (endTime == null)
    {
      return new Date().getTime() - startTime.getTime();
    } else
    {
      return endTime.getTime() - startTime.getTime();
    }
  }
}