adapter-Any real example of Adapter Pattern [closed]

Answer 1

Adapter design patterns helps in converting interface of one class into interface of client expects.

Example: You have a service which returns weather (in celsius) by passing city name as a input value. Now, assume that your client wants to pass zipcode as input and expecting the temperature of the city in return. Here you need an adaptor to achieve this.

public interface IWetherFinder {
    public double getTemperature(String cityName);
}

class WeatherFinder implements IWetherFinder{
   @Override
   public double getTemperature(String cityName){
     return 40;
   }
}

interface IWeatherFinderClient
{
   public double getTemperature(String zipcode);
}  

public class WeatherAdapter implements IWeatherFinderClient {

    @Override
    public double getTemperature(String zipcode) {

        //method to get cityname by zipcode 
        String cityName = getCityName(zipcode);

        //invoke actual service
        IWetherFinder wetherFinder = new WeatherFinder();
        return wetherFinder.getTemperature(cityName);
    }

    private String getCityName(String zipCode) {
        return "Banaglore";
    }
}