Please tell me when to use getinstance method in java

Question

Below is the code, I have the doubt: 

locationProvider = LocationProvider.getInstance(null); 

Can anyone tell me when one should use the getInstance() method and what getInstance(null) means? 

Answer 1

This code provides the latitude and longitude and getInstance() will give you the instance of that particular class: 

    Criteria myCriteria = new Criteria();

    myCriteria.setCostAllowed(false);

    LocationProvider myLocationProvider = LocationProvider.getInstance(myCriteria);

    Location myLocation = myLocationProvider.getLocation(300);

    latitude  = myLocation.getQualifiedCoordinates().getLatitude();

    longitude = myLocation.getQualifiedCoordinates().getLongitude();

Interested in Java? Check out this Java Certification by Intellipaat.