Симоненко Леонид. Задачи 5.1 - 5.4.

task01/src/com/example/task01/Level.java

@@ -0,0 +1,8 @@
+package com.example.task01;
+
+public enum Level {
+    INFO,
+    DEBUG,
+    WARNING,
+    ERROR
+}

task01/src/com/example/task01/Logger.java

@@ -0,0 +1,69 @@
+package com.example.task01;
+import java.util.HashMap;
+import java.util.Map;
+import java.text.SimpleDateFormat;
+import java.util.Date;
+
+public class Logger {
+    private final String name;
+    private Level level = Level.INFO;
+    private static final Map<String, Logger> loggers = new HashMap<>();
+
+    public Logger(String name) {
+        this.name = name;
+        loggers.put(name,this);
+    }
+    public String getName(){
+        return name;
+    }
+
+    public static Logger getLogger(String name){
+        if (!loggers.containsKey(name))
+            throw new IllegalArgumentException("There is no logger with that name");
+        return loggers.get(name);
+    }
+    public void setLevel(Level level){
+        this.level = level;
+    }
+    public Level getLevel(){
+        return level;
+    }
+
+    public void info(String message){
+        log(Level.INFO, message);
+    }
+    public void info(String format, Object... args){
+        log(Level.INFO, format, args);
+    }
+    public void debug(String message){
+        log(Level.DEBUG, message);
+    }
+    public void debug(String format, Object... args){
+        log(Level.DEBUG, format, args);
+    }
+    public void error(String message){
+        log(Level.ERROR, message);
+    }
+    public void error(String format, Object... args){
+        log(Level.ERROR, format, args);
+    }
+    public void warning(String message){
+        log(Level.WARNING, message);
+    }
+    public void warning(String format, Object... args){
+        log(Level.WARNING, format, args);
+    }
+    public void log(Level level, String message){
+        if (this.level == level){
+            SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy.MM.dd");
+            SimpleDateFormat timeFormat = new SimpleDateFormat("HH:mm:ss");
+            String date = dateFormat.format(new Date());
+            String time = timeFormat.format(new Date());
+            System.out.println(String.format("[%s] %s %s %s - %s", level, date, time, name, message));;
+        }
+    }
+
+    public void log(Level level, String format, Object... args) {
+        log(level, String.format(format, args));
+    }
+}

task02/src/com/example/task02/Bill.java

@@ -62,4 +62,4 @@ private static class BillItem {
             this.amount = amount;
         }
     }
-}
+}

task02/src/com/example/task02/DiscountBill.java

@@ -0,0 +1,20 @@
+package com.example.task02;
+
+public class DiscountBill extends Bill
+{
+    private final double discount;
+    public DiscountBill(double discount){
+        this.discount = discount;
+    }
+    public double getDiscount() {
+        return discount;
+    }
+    public double getDiscountAmount() {
+        return super.getPrice() * discount / 100;
+    }
+
+    @Override
+    public long getPrice() {
+        return Math.round(super.getPrice() * (100 - discount) / 100.0);
+    }
+}

task02/src/com/example/task02/Item.java

@@ -25,4 +25,4 @@ public long getPrice() {
     public String toString() {
         return String.format("[%s:%d]", name, price);
     }
-}
+}

task02/src/com/example/task02/Task02Main.java

@@ -1,21 +1,24 @@
 package com.example.task02;
 
 public class Task02Main {
-
     private static final Item ITEM1 = new Item("Товар 1", 10);
     private static final Item ITEM2 = new Item("Товар 2", 20);
     private static final Item ITEM3 = new Item("Товар 3", 30);
-    private static final Item ITEM4 = new Item("Товар 4", 40);
-    private static final Item ITEM5 = new Item("Товар 5", 50);
-    private static final Item ITEM6 = new Item("Товар 6", 60);
 
     public static void main(String[] args) {
         Bill bill = new Bill();
         bill.add(ITEM1, 10);
-        bill.add(ITEM3, 3);
-        bill.add(ITEM6, 1);
-        System.out.println(bill);
-        bill.add(ITEM3, 3);
-        System.out.println(bill);
+        bill.add(ITEM2, 5);
+        bill.add(ITEM3, 2);
+        System.out.println("Базовый счет:\n\n" + bill);
+
+        DiscountBill discountBill = new DiscountBill(10);
+        discountBill.add(ITEM1, 10);
+        discountBill.add(ITEM2, 5);
+        discountBill.add(ITEM3, 2);
+        System.out.println("\nСчет со скидкой:\n" + discountBill);
+        System.out.println("\nРазмер скидки: " + discountBill.getDiscount() + "%");
+        System.out.println("Абсолютное значение скидки: " + discountBill.getDiscountAmount());
+        System.out.println("Итоговая стоимость: " + discountBill.getPrice());
     }
-}
+}

task03/src/com/example/task03/Hours.java

@@ -0,0 +1,30 @@
+package com.example.task03;
+
+public class Hours implements TimeUnit {
+
+    private final long amount;
+
+    public Hours(long amount) {
+        this.amount = amount;
+    }
+
+    @Override
+    public long toMillis() {
+        return amount * 3600 * 1000;
+    }
+
+    @Override
+    public long toSeconds() {
+        return amount * 3600;
+    }
+
+    @Override
+    public long toMinutes() {
+        return amount * 60;
+    }
+
+    @Override
+    public long toHours() {
+        return amount;
+    }
+}

task03/src/com/example/task03/Milliseconds.java

@@ -18,11 +18,16 @@ public long toMillis() {
 
     @Override
     public long toSeconds() {
-        return amount / 1000;
+        return Math.round(amount / 1000f);
     }
 
     @Override
     public long toMinutes() {
-        return amount / 1000 * 60;
+        return Math.round(amount / 1000 / 60f);
     }
-}
+
+    @Override
+    public long toHours() {
+        return this.amount / 3600 / 1000 ;
+    }
+}

task03/src/com/example/task03/Minutes.java

@@ -1,27 +1,28 @@
 package com.example.task03;
 
 public class Minutes implements TimeUnit {
-
+    private final long amount;
     public Minutes(long amount) {
-        // TODO: реализовать
-        throw new UnsupportedOperationException();
+        this.amount = amount;
     }
 
     @Override
     public long toMillis() {
-        // TODO: реализовать
-        throw new UnsupportedOperationException();
+        return amount * 60 * 1000;
     }
 
     @Override
     public long toSeconds() {
-        // TODO: реализовать
-        throw new UnsupportedOperationException();
+        return amount * 60;
     }
 
     @Override
     public long toMinutes() {
-        // TODO: реализовать
-        throw new UnsupportedOperationException();
+        return amount;
+    }
+
+    @Override
+    public long toHours() {
+        return Math.round(amount / 60f);
     }
-}
+}

task03/src/com/example/task03/Seconds.java

@@ -23,6 +23,10 @@ public long toSeconds() {
 
     @Override
     public long toMinutes() {
-        return Math.round(amount / 60);
+        return Math.round(amount / 60f);
     }
-}
+    @Override
+    public long toHours() {
+        return Math.round(amount / 3600f);
+    }
+}

task03/src/com/example/task03/Task03Main.java

@@ -10,5 +10,6 @@ private static void printTimeUnit(TimeUnit unit) {
         System.out.println(String.format("Milliseconds: %d", unit.toMillis()));
         System.out.println(String.format("Seconds:      %d", unit.toSeconds()));
         System.out.println(String.format("Minutes:      %d", unit.toMinutes()));
+        System.out.println(String.format("Hours:      %d", unit.toHours()));
     }
 }

task03/src/com/example/task03/TimeUnit.java

@@ -28,4 +28,11 @@ public interface TimeUnit {
      */
     long toMinutes();
 
+    /**
+     * Возвращает продолжительность текущего интервала, пересчитанного в часах.
+     * При необходимости округлять по обычным правилам округления (число, меньшее 0.5 переходит в 0, большее или равное - в 1)
+     *
+     * @return количество часов в текущем интервале
+     */
+    long toHours();
 }

task03/src/com/example/task03/TimeUnitUtils.java

@@ -21,7 +21,47 @@ public static Milliseconds toMillis(Seconds seconds) {
      * @param millis интервал в миллисекундах
      * @return интервал в секундах
      */
+    public static Milliseconds toMillis(Minutes minutes) {
+        return new Milliseconds(minutes.toMillis());
+    }
+
+    public static Milliseconds toMillis(Hours hours) {
+        return new Milliseconds(hours.toMillis());
+    }
+
     public static Seconds toSeconds(Milliseconds millis) {
         return new Seconds(millis.toSeconds());
     }
-}
+
+    public static Seconds toSeconds(Minutes minutes) {
+        return new Seconds(minutes.toSeconds());
+    }
+
+    public static Seconds toSeconds(Hours hours) {
+        return new Seconds(hours.toSeconds());
+    }
+
+    public static Minutes toMinutes(Milliseconds milliseconds){
+        return new Minutes(milliseconds.toMinutes());
+    }
+
+    public static Minutes toMinutes(Seconds seconds){
+        return new Minutes(seconds.toMinutes());
+    }
+
+    public static Minutes toMinutes(Hours hours){
+        return new Minutes(hours.toMinutes());
+    }
+
+    public static Hours toHours(Milliseconds milliseconds){
+        return new Hours(milliseconds.toHours());
+    }
+
+    public static Hours toHours(Seconds seconds){
+        return new Hours(seconds.toHours());
+    }
+
+    public static Hours toHours(Minutes minutes){
+        return new Hours(minutes.toHours());
+    }
+}

task04/src/com/example/task04/ConsoleHandler.java

@@ -0,0 +1,8 @@
+package com.example.task04;
+
+public class ConsoleHandler implements MessageHandler{
+    @Override
+    public void log(String message) {
+        System.out.println(message);
+    }
+}

task04/src/com/example/task04/FileHandler.java

@@ -0,0 +1,15 @@
+package com.example.task04;
+
+import java.io.FileWriter;
+import java.io.IOException;
+
+public class FileHandler implements MessageHandler {
+    @Override
+    public void log(String message) {
+        try (FileWriter writer = new FileWriter("log.txt", true)) {
+            writer.write(message + "\n");
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+    }
+}

task04/src/com/example/task04/Level.java

@@ -0,0 +1,8 @@
+package com.example.task04;
+
+public enum Level {
+    DEBUG,
+    INFO,
+    WARNING,
+    ERROR
+}