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63 lines
1.9 KiB
63 lines
1.9 KiB
2 years ago
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/*
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* To change this license header, choose License Headers in Project Properties.
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* To change this template file, choose Tools | Templates
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* and open the template in the editor.
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*/
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package rulespecs;
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import java.util.ArrayList;
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import java.util.List;
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/**
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*
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* @author denis
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*/
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public class RulesPECS {
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/**
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* @param args the command line arguments
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*/
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public static void main(String[] args) {
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RulesPECS rules = new RulesPECS();
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List<Country> countrys = new ArrayList<>();
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countrys.add(new Country());
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List<City> citys = new ArrayList<>();
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citys.add(new City());
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List<District> districts = new ArrayList<>();
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districts.add(new District());
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List<Street> streets = new ArrayList<>();
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streets.add(new Street());
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rules.producer(countrys);
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rules.producer(citys);
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rules.producer(districts);
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rules.producer(streets);
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rules.consumer(countrys);
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rules.consumer(citys);
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rules.consumer(districts);
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rules.consumer(streets);
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}
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public void producer (List<? extends District> list){
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list.add(new Country());
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list.add(new City());
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list.add(new District());
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list.add(new Street());
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}
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public void consumer (List<? super District> list){
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Object district = list.get(0);
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if(district instanceof Country) System.out.println("Object is Country");
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if(district instanceof City) System.out.println("Object is City");
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if(district instanceof District) System.out.println("Object is District");
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if(district instanceof Street) System.out.println("Object is Street");
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list.add(new Country());
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list.add(new City());
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list.add(new District());
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list.add(new Street());
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}
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}
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