22.11.2016

sustav86 · sustav86 · commit ab99600a7432 · 2016-11-22T23:25:37.000+02:00
diff --git a/com/javarush/test/level23/lesson06/task01/Solution.java b/com/javarush/test/level23/lesson06/task01/Solution.java
@@ -0,0 +1,23 @@
+package com.javarush.test.level23.lesson06.task01;
+
+/* Как выбрать нужное?
+В методе main присвойте объекту Object obj экземпляр класса TEST
+Константу TEST и класс TEST менять нельзя.
+*/
+public class Solution {
+    public static final String TEST = "test";
+
+    public static class TEST {
+        @Override
+        public String toString() {
+            return "test class";
+        }
+    }
+
+    static Object obj;
+
+    public static void main(String[] args) {
+        obj = new Solution.TEST();
+        System.out.println(obj);
+    }
+}
diff --git a/com/javarush/test/level23/lesson06/task02/Solution.java b/com/javarush/test/level23/lesson06/task02/Solution.java
@@ -0,0 +1,56 @@
+package com.javarush.test.level23.lesson06.task02;
+
+/* Рефакторинг
+Отрефакторите класс Solution: вынесите все константы в public вложенный(nested) класс Constants.
+Запретите наследоваться от Constants.
+*/
+public class Solution {
+
+    public class ServerNotAccessibleException extends Exception {
+        public ServerNotAccessibleException() {
+            super(Constants.U_IS_NOT_ACCESSIBLE_NOW);
+        }
+
+        public ServerNotAccessibleException(Throwable cause) {
+            super(Constants.U_IS_NOT_ACCESSIBLE_NOW, cause);
+        }
+    }
+
+    public class UnauthorizedUserException extends Exception {
+        public UnauthorizedUserException() {
+            super(Constants.U_IS_NOT_AUTHORIZED);
+        }
+
+        public UnauthorizedUserException(Throwable cause) {
+            super(Constants.U_IS_NOT_AUTHORIZED, cause);
+        }
+    }
+
+    public class BannedUserException extends Exception {
+        public BannedUserException() {
+            super(Constants.U_IS_BANNED);
+        }
+
+        public BannedUserException(Throwable cause) {
+            super(Constants.U_IS_BANNED, cause);
+        }
+    }
+
+    public class RestrictionException extends Exception {
+        public RestrictionException() {
+            super(Constants.A_IS_DENIED);
+        }
+
+        public RestrictionException(Throwable cause) {
+            super(Constants.A_IS_DENIED, cause);
+        }
+    }
+
+    public final static class Constants {
+        static final String A_IS_DENIED = "Access is denied.";
+        static final String U_IS_BANNED = "User is banned.";
+        static final String U_IS_NOT_AUTHORIZED = "User is not authorized.";
+        static final String U_IS_NOT_ACCESSIBLE_NOW = "Server is not accessible for now.";
+
+    }
+}
diff --git a/com/javarush/test/level23/lesson08/home01/AbstractDbSelectExecutor.java b/com/javarush/test/level23/lesson08/home01/AbstractDbSelectExecutor.java
@@ -0,0 +1,45 @@
+package com.javarush.test.level23.lesson08.home01;
+
+import com.javarush.test.level23.lesson08.home01.vo.NamedItem;
+
+import java.lang.reflect.ParameterizedType;
+import java.util.ArrayList;
+import java.util.List;
+
+public abstract class AbstractDbSelectExecutor<T extends NamedItem> {
+
+    public abstract String getQuery();
+
+    /**
+     * It's fake method
+     *
+     * @return a list of 5 fake items
+     */
+    public List<T> execute() {
+        List<T> result = new ArrayList<>();
+        //assert the query is not null
+        String query = getQuery();
+        if (query == null) return result;
+
+        try {
+            //generate 5 fake items
+            for (int i = 1; i <= 5; i++) {
+                T newItem = getNewInstanceOfGenericType();
+                newItem.setId(i);
+                newItem.setName(newItem.getClass().getSimpleName() + "-" + i);
+                newItem.setDescription("Got by executing '" + query + "'");
+                result.add(newItem);
+            }
+        } catch (InstantiationException | IllegalAccessException e) {
+            e.printStackTrace();
+        }
+        return result;
+    }
+
+    //reflection
+    //you have to know that it is possible to create new instance of T (generic type) class by using its default constructor
+    private T getNewInstanceOfGenericType() throws InstantiationException, IllegalAccessException {
+        return (T) ((Class) ((ParameterizedType) this.getClass().
+                getGenericSuperclass()).getActualTypeArguments()[0]).newInstance();
+    }
+}
diff --git a/com/javarush/test/level23/lesson08/home01/Solution.java b/com/javarush/test/level23/lesson08/home01/Solution.java
@@ -0,0 +1,93 @@
+package com.javarush.test.level23.lesson08.home01;
+
+import com.javarush.test.level23.lesson08.home01.vo.*;
+
+import java.util.List;
+
+/* Анонимность иногда так приятна!
+1. В пакете vo создайте public классы User, Location, Server, Subject, Subscription, которые наследуются от NamedItem
+2. В классе Solution для каждого класса создайте свой метод, который возвращает список экземпляров класса.
+Например, для класса User это будет - public List<User> getUsers()
+Для класса Location это будет - public List<Location> getLocations()
+3. Внутри каждого такого метода создайте анонимный класс от AbstractDbSelectExecutor и вызовите его нужный метод.
+Подсказка: тело метода должно начинаться так: return new AbstractDbSelectExecutor
+
+4. Пример вывода для User и Location:
+Id=5, name='User-5', description=Got by executing 'select * from USER'
+Id=1, name='Location-1', description=Got by executing 'select * from LOCATION'
+
+5. Проанализируйте пример вывода и сформируйте правильный query для всех классов.
+6. Классы не должны содержать закоментированного кода.
+*/
+public class Solution {
+    public static void main(String[] args) {
+        Solution solution = new Solution();
+        print(solution.getUsers());
+        print(solution.getLocations());
+    }
+
+    public static void print(List list) {
+        String format = "Id=%d, name='%s', description=%s";
+        for (Object obj : list) {
+            NamedItem item = (NamedItem) obj;
+            System.out.println(String.format(format, item.getId(), item.getName(), item.getDescription()));
+        }
+    }
+
+    public List<User> getUsers() {
+        return new AbstractDbSelectExecutor<User>() {
+
+            @Override
+            public String getQuery()
+            {
+                return "select * from USER";
+            }
+        }.execute();
+
+    }
+
+    public List<Location> getLocations() {
+        return new AbstractDbSelectExecutor<Location>() {
+
+            @Override
+            public String getQuery()
+            {
+                return "select * from LOCATION";
+            }
+        }.execute();
+    }
+
+    public List<Server> getServers() {
+        return new AbstractDbSelectExecutor<Server>() {
+
+            @Override
+            public String getQuery()
+            {
+                return "select * from SERVER";
+            }
+        }.execute();
+    }
+
+    public List<Subject> getSubjects() {
+        return new AbstractDbSelectExecutor<Subject>() {
+
+            @Override
+            public String getQuery()
+            {
+                return "select * from SUBJECT";
+            }
+        }.execute();
+    }
+
+    public List<Subscription> getSubscriptions() {
+        return new AbstractDbSelectExecutor<Subscription>() {
+
+            @Override
+            public String getQuery()
+            {
+                return "select * from SUBSCRIPTION";
+            }
+        }.execute();
+    }
+
+}
diff --git a/com/javarush/test/level23/lesson08/home01/vo/Location.java b/com/javarush/test/level23/lesson08/home01/vo/Location.java
@@ -0,0 +1,8 @@
+package com.javarush.test.level23.lesson08.home01.vo;
+
+/**
+ * Created by ukr-sustavov on 22.11.2016.
+ */
+public class Location extends NamedItem
+{
+}
diff --git a/com/javarush/test/level23/lesson08/home01/vo/NamedItem.java b/com/javarush/test/level23/lesson08/home01/vo/NamedItem.java
@@ -0,0 +1,34 @@
+package com.javarush.test.level23.lesson08.home01.vo;
+
+public class NamedItem {
+    private int id;
+    private String name;
+    private String description;
+
+    public NamedItem() {
+    }
+
+    public int getId() {
+        return id;
+    }
+
+    public void setId(int id) {
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public String getDescription() {
+        return description;
+    }
+
+    public void setDescription(String description) {
+        this.description = description;
+    }
+}
diff --git a/com/javarush/test/level23/lesson08/home01/vo/Server.java b/com/javarush/test/level23/lesson08/home01/vo/Server.java
@@ -0,0 +1,8 @@
+package com.javarush.test.level23.lesson08.home01.vo;
+
+/**
+ * Created by ukr-sustavov on 22.11.2016.
+ */
+public class Server extends NamedItem
+{
+}
diff --git a/com/javarush/test/level23/lesson08/home01/vo/Subject.java b/com/javarush/test/level23/lesson08/home01/vo/Subject.java
@@ -0,0 +1,8 @@
+package com.javarush.test.level23.lesson08.home01.vo;
+
+/**
+ * Created by ukr-sustavov on 22.11.2016.
+ */
+public class Subject extends NamedItem
+{
+}
diff --git a/com/javarush/test/level23/lesson08/home01/vo/Subscription.java b/com/javarush/test/level23/lesson08/home01/vo/Subscription.java
@@ -0,0 +1,8 @@
+package com.javarush.test.level23.lesson08.home01.vo;
+
+/**
+ * Created by ukr-sustavov on 22.11.2016.
+ */
+public class Subscription extends NamedItem
+{
+}
diff --git a/com/javarush/test/level23/lesson08/home01/vo/User.java b/com/javarush/test/level23/lesson08/home01/vo/User.java
@@ -0,0 +1,8 @@
+package com.javarush.test.level23.lesson08.home01.vo;
+
+/**
+ * Created by ukr-sustavov on 22.11.2016.
+ */
+public class User extends NamedItem
+{
+}
diff --git a/com/javarush/test/level23/lesson08/task01/Solution.java b/com/javarush/test/level23/lesson08/task01/Solution.java
@@ -0,0 +1,29 @@
+package com.javarush.test.level23.lesson08.task01;
+
+/* Напряги извилины!
+Метод printName должен выводить свое собственное имя, т.е. "sout"
+Сделайте минимум изменений.
+*/
+public class Solution {
+    private String name;
+
+    Solution(String name) {
+        this.name = name;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    private void sout() {
+        new Solution("sout") {
+            void printName() {
+                System.out.println(this.getName());
+            }
+        }.printName();
+    }
+
+    public static void main(String[] args) {
+        new Solution("main").sout();
+    }
+}
diff --git a/com/javarush/test/level23/lesson08/task02/Solution.java b/com/javarush/test/level23/lesson08/task02/Solution.java
@@ -0,0 +1,56 @@
+package com.javarush.test.level23.lesson08.task02;
+
+/* Повторяем threads
+Сделать так, чтобы в методе someActions вызывались только методы класса Solution.
+Ожидаемый вывод в методе main:
+Amigo: Mmmmm, beef
+Amigo: knock knock
+Amigo: Zzzzzzz...1 sec
+*/
+public class Solution {
+    public final String name;
+    public final String food;
+    public final String sound;
+
+    public Solution(String name, String food, String sound) {
+        this.name = name;
+        this.food = food;
+        this.sound = sound;
+    }
+
+    public void eat() {
+        System.out.println(name + ": Mmmmm, " + food);
+    }
+
+    public void play() {
+        System.out.println(name + ": " + sound + " " + sound);
+    }
+
+    public void sleep(long milliseconds) {
+        System.out.println(name + ": Zzzzzzz..." + (milliseconds / 1000) + " sec");
+    }
+
+    public void live() throws InterruptedException {
+        Thread thread = new Thread() {
+            public void run() {
+                try {
+                    someActions();
+                } catch (Exception e) {
+                    e.printStackTrace();
+                }
+            }
+
+            private void someActions() throws InterruptedException {
+                Solution.this.eat();
+                Solution.this.play();
+                Solution.this.sleep(1000);
+            }
+        };
+        thread.start();
+        thread.join();
+    }
+
+    public static void main(String[] args) throws InterruptedException {
+        new Solution("Amigo", "beef", "knock").live();
+    }
+}
diff --git a/com/javarush/test/level23/lesson13/big01/KeyboardObserver.java b/com/javarush/test/level23/lesson13/big01/KeyboardObserver.java
diff --git a/com/javarush/test/level23/lesson13/big01/Mouse.java b/com/javarush/test/level23/lesson13/big01/Mouse.java
diff --git a/com/javarush/test/level23/lesson13/big01/Room.java b/com/javarush/test/level23/lesson13/big01/Room.java
diff --git a/com/javarush/test/level23/lesson13/big01/Snake.java b/com/javarush/test/level23/lesson13/big01/Snake.java
diff --git a/com/javarush/test/level23/lesson13/big01/SnakeDirection.java b/com/javarush/test/level23/lesson13/big01/SnakeDirection.java
diff --git a/com/javarush/test/level23/lesson13/big01/SnakeSection.java b/com/javarush/test/level23/lesson13/big01/SnakeSection.java
