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country/src/main/java/ru/molokoin/Area.java

@@ -9,26 +9,35 @@ public class Area {
     Area(String name, int population, int square){
         init(name, population, square);
     }
-
     public void init(String name, int population, int square){
         setName(name);
         setPopulation(population);
         setSquare(square);
     }
     public void print(){
-        System.out.println("name: " + name + "; population:" + population + "; square: " + square);
+        if (name != "") System.out.println("name: " + name);
+        if (population > 0) System.out.println("population: " + population);
+        if (square > 0) System.out.println("square: " + square);
     }
-    
     /**
      * @param name the name to set
      */
     public void setName(String name) {
+        try {
+            if(name == "")throw new IllegalArgumentException(name);
+        } catch (IllegalArgumentException e) {
+            System.out.println("Наименвание не должно быть пустым. ");
+            e.printStackTrace();
+            this.name = name;
+        }
         this.name = name;
     }
     /**
      * @param population the population to set
      */
     public void setPopulation(int population) {
+        //население не может быть отрицательным
+        if (population < 0) throw new IllegalArgumentException("Население не может быть отрицательным ...");
         this.population = population;
     }
     /**
@@ -38,7 +47,6 @@ public class Area {
         if (square < 0) throw new IllegalArgumentException("площадь не может быть отрицательной ...");
         this.square = square;
     }
-
     /**
      * @return the name
      */

country/src/main/java/ru/molokoin/Country.java

@@ -5,9 +5,29 @@ public class Country extends Area{
 
     public Country() {
     }
-    Country(String name, int population, int square, String capitalName, int capitalPopulation, int capitalSquare){
+    Country(String name, int population, int square){
+        //this(name, population, square, null, null, null);
+        //TODO исключить дублирование метода Area.init()
         this.init(name, population, square);
-        setCapital(new Area(capitalName, capitalPopulation, capitalSquare));
+    }
+    Country(String name, int population, int square, String capitalName, int capitalPopulation, int capitalSquare){
+        //параметры страны
+        this.init(name
+        , population
+        , square);
+        //параметры столицы
+        if (capitalName != null)
+        setCapital(new Area(capitalName
+        , capitalPopulation
+        , capitalSquare));
+    }
+    public static void print(Country country){
+        System.out.println("-------------------------------------------");
+        Area a = (Country) country;
+        a.print();
+        country.getCapital().print();
+        System.out.println("-------------------------------------------");
+
     }
 
     /**

country/src/main/java/ru/molokoin/Map.java

@@ -1,32 +1,36 @@
 package ru.molokoin;
 
 public class Map {
-    private Country[] map = new Country[5];
-    public void initDefaults(){
-        System.out.println("map.length: " + map.length + " ...");
+    public Country[] map; 
     //заполняем поля данными
-        map[0] = new Country("Russia", 17100000, 146700000, "Moscow", 12600000, 0);
-        map[1] = new Country("Russia", 17100000, 146700000, "Moscow", 12600000, 0);
-        map[2] = new Country("Russia", 17100000, 146700000, "Moscow", 12600000, 0);
-        map[3] = new Country("Russia", 17100000, 146700000, "Moscow", 12600000, 0);
-        map[4] = new Country("Russia", 17100000, 146700000, "Moscow", 12600000, 0);
+    public void initDefaults(){
+        map = new Country[5];
+        //Россия
+        map[0] = new Country("Russia", 146700000, 17100000, "Moscow", 12600000, 0);
+        //Финляндия
+        map[1] = new Country("Finland", 5500000, 338000, "Helsinki", 655000, 0);
+        //Франция
+        map[2] = new Country("France", 67800000, 643800, "Paris", 2100000, 0);
+
+        //Андора
+        map[3] = new Country("Andorra", 85000, 647, "Andorra la Vella", 22600, 0);
+
+        //Сингапур
+        map[4] = new Country("Singapore", 5700000, 725, "", 0, 0);
     }
-    public static void print(Country[] map){
+    public static void printAll(Country[] map){
+        System.out.println("printAll"); 
         System.out.println("Количество государств, данные о которых включены в terra: " + map.length);
         int i = 0;
         while (i < map.length) {
-            System.out.println("-------------------------------------------");
-            map[i].print();
-            map[i].getCapital().print();
-            System.out.println("-------------------------------------------");
+            Country.print(map[i]);
             i++;
         }
-
     }
     public static void main(String[] args) {
         System.out.println("App.main()");
         Map terra = new Map();
         terra.initDefaults();
-        print(terra.map);
+        printAll(terra.map);
     }
 }