This is an easy solution, all i need is one method to be finished. This is what

Question

This is an easy solution, all i need is one method to be finished. This is what I need the method to do

Ad updatePosition: The method updatePosition should set the field position to the current GPS position. We simulate the movement of the GPS and the reading of the current GPS position by calculating a random numbers between -2.5 and 2.5 (exclusive) and adding it to the longitude. Then it calculates another random number form the same range and adds it to the latitude.

here is the code:

package GPS;

public class GPS {

   private String name;
   private GPSCoordinates position;
  
   GPS(String n, GPSCoordinates pos)
   {
       name = n;
       updatePosition(pos);
   }

   public GPSCoordinates getPosition() {
       return position;
   }

   public GPSCoordinates updatePosition(GPSCoordinates position) {
       this.position = position;
       return position;
   }
  
   @Override
   public String toString()
   {
       return name + ": " + position;
   }
  
}

package GPS;

public class GPSCoordinates {

   private double latitude;
   private double longitude;
  
   GPSCoordinates(double lat, double lon)
   {
       setLatitude(lat);
       setLongitude(lon);
   }

   public double getLatitude() {
       return latitude;
   }

   public void setLatitude(double latitude) {
       this.latitude = latitude;
   }

   public double getLongitude() {
       return longitude;
   }

   public void setLongitude(double longitude) {
       this.longitude = longitude;
   }
  
   public String toString()
   {
       return latitude + ", " + longitude;
   }
}

Explanation / Answer

//Please find the required solution

//changes in bold letters and added main() for testing

//GPS.java

package GPS;

public class GPS {

private String name;
private GPSCoordinates position;
  
GPS(String n, GPSCoordinates pos)
{
name = n;
updatePosition(pos);
}

public GPSCoordinates getPosition() {
return position;
}
public GPSCoordinates updatePosition(GPSCoordinates position) {
   //generating the random numbers between -2.5 to 2.5 and assign to current position
   position.setLatitude(position.getLatitude()+(Math.random()*5)-2.5);
   position.setLongitude(position.getLongitude()+(Math.random()*5)-2.5);
this.position = position;
return position;
}
@Override
public String toString()
{
return name + ": " + position;
}
public static void main(String[] args)
{
  
   GPSCoordinates gpscoord=new GPSCoordinates(26.7, 32.5);//initial coordinates
   GPS gp=new GPS("place", gpscoord);
   System.out.println(gp);//coordinates after change(because update in constructor)
   gp.updatePosition(gpscoord);
   System.out.println(gp);//coordinates after change because we called update
   }   

}

//GPSCoordinates.java

package GPS;

public class GPSCoordinates {

private double latitude;
private double longitude;
  
GPSCoordinates(double lat, double lon)
{
setLatitude(lat);
setLongitude(lon);
}

public double getLatitude() {
return latitude;
}

public void setLatitude(double latitude) {
this.latitude = latitude;
}

public double getLongitude() {
return longitude;
}

public void setLongitude(double longitude) {
this.longitude = longitude;
}
  
public String toString()
{
return latitude + ", " + longitude;
}
}

Sample outPut:

place: 25.20241337342978, 30.808918307811894
place: 26.95065375183622, 31.203480075510278

Related Questions

Navigate

• Browse (All)
• Browse T
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.