Updated a lesson 09.

Author: suoapvs

src/main/java/com/yurii/salimov/lesson09/task01_02_03/Human.java

@@ -6,7 +6,7 @@
  * @author Yuriy Salimov ([email protected])
  * @version 1.0
  */
-public class Human implements Cloneable, Serializable {
+public final class Human implements Cloneable, Serializable {
 
     private static final long serialVersionUID = 1L;
     private String name;
@@ -22,7 +22,10 @@ public Human() {
         this.weight = 70;
     }
 
-    public Human(String name, String surname, String birth, String sex) {
+    public Human(
+            final String name, final String surname,
+            final String birth, final String sex
+    ) {
         this();
         this.name = name;
         this.surname = surname;
@@ -38,18 +41,18 @@ public Human clone() throws CloneNotSupportedException {
     @Override
     public String toString() {
         return "Human{" +
-                "name='" + name + '\'' +
-                ", surname='" + surname + '\'' +
-                ", birth='" + birth + '\'' +
-                ", sex='" + sex + '\'' +
-                ", profession='" + profession + '\'' +
-                ", height=" + height +
-                ", weight=" + weight +
+                "name='" + this.name + '\'' +
+                ", surname='" + this.surname + '\'' +
+                ", birth='" + this.birth + '\'' +
+                ", sex='" + this.sex + '\'' +
+                ", profession='" + this.profession + '\'' +
+                ", height=" + this.height +
+                ", weight=" + this.weight +
                 '}';
     }
 
     @Override
-    public boolean equals(Object object) {
+    public boolean equals(final Object object) {
         if (this == object) {
             return true;
         }
@@ -83,47 +86,47 @@ public String getName() {
         return this.name;
     }
 
-    public void setName(String name) {
+    public void setName(final String name) {
         this.name = name;
     }
 
     public String getSurname() {
         return this.surname;
     }
 
-    public void setSurname(String surname) {
+    public void setSurname(final String surname) {
         this.surname = surname;
     }
 
     public String getBirth() {
         return this.birth;
     }
 
-    public void setBirth(String birth) {
+    public void setBirth(final String birth) {
         this.birth = birth;
     }
 
     public String getSex() {
         return this.sex;
     }
 
-    public void setSex(String sex) {
+    public void setSex(final String sex) {
         this.sex = sex;
     }
 
     public String getProfession() {
         return this.profession;
     }
 
-    public void setProfession(String profession) {
+    public void setProfession(final String profession) {
         this.profession = profession;
     }
 
     public int getHeight() {
         return this.height;
     }
 
-    public void setHeight(int height) {
+    public void setHeight(final int height) {
         this.height = height;
     }
 

src/main/java/com/yurii/salimov/lesson09/task01_02_03/Main.java

@@ -21,19 +21,21 @@
 public class Main {
 
     public static void main(String[] args) {
+        final Serialization serialization = new Serialization();
         final File file = new File("List.txt");
         if (!file.exists() || !file.isFile() || file.length() == 0) {
             int number = 10;
-            final MySet<Human> humanList = createHumanSet(number) ;
-            humanList.print();
-            Serialization.serialize(humanList, file);
+            final MySet<Human> humans = createHumanSet(number) ;
+            humans.print();
+            serialization.serialize(humans, file);
         } else {
-            ((MySet) Serialization.deserialize(file)).print();
+            final MySet humans = (MySet) serialization.deserialize(file);
+            humans.print();
         }
     }
 
-    private static MySet<Human> createHumanSet(int number) {
-        MySet<Human> humanMySet = new MySet<>();
+    private static MySet<Human> createHumanSet(final int number) {
+        final MySet<Human> humanMySet = new MySet<>();
         final Scanner scanner = new Scanner(System.in);
         System.out.println("Enter data about " + number + " persons:");
         for (int i = 0; i < number; i++) {

src/main/java/com/yurii/salimov/lesson09/task01_02_03/MySet.java

@@ -1,19 +1,28 @@
 package com.yurii.salimov.lesson09.task01_02_03;
 
 import java.io.Serializable;
+import java.util.Collection;
 import java.util.HashSet;
 import java.util.Set;
 /**
  * @author Yuriy Salimov ([email protected])
  * @version 1.0
  */
-public class MySet<T> implements Serializable {
+public final class MySet<T> implements Serializable {
 
     private static final long serialVersionUID = 1L;
-    private Set<T> set = new HashSet<>();
+    private final Set<T> set = new HashSet<>();
 
-    public boolean add(T obj) {
-        return set.add(obj);
+    public boolean add(final T obj) {
+        return this.set.add(obj);
+    }
+
+    public boolean addAll(final Collection<T> collection) {
+        return this.set.addAll(collection);
+    }
+
+    public void clear() {
+        this.set.clear();
     }
 
     public void print() {
@@ -27,10 +36,6 @@ public Set getSet() {
         return set;
     }
 
-    public void setSet(Set<T> set) {
-        this.set = set;
-    }
-
     public int size() {
         return set.size();
     }

src/main/java/com/yurii/salimov/lesson09/task01_02_03/Serialization.java

@@ -11,23 +11,25 @@
  * @author Yuriy Salimov ([email protected])
  * @version 1.0
  */
-public class Serialization {
+public final class Serialization {
 
-    public static void serialize(Object obj, File file) {
-        try (ObjectOutputStream output = new ObjectOutputStream(new FileOutputStream(file))) {
+    public void serialize(final Object obj, final File file) {
+        try (FileOutputStream fos = new FileOutputStream(file);
+                ObjectOutputStream output = new ObjectOutputStream(fos)) {
             output.writeObject(obj);
         } catch (IOException ex) {
             System.out.println("ERROR save object!");
         }
     }
 
-    public static void serialize(Object obj, String path) {
+    public void serialize(final Object obj, final String path) {
         serialize(obj, new File(path));
     }
 
-    public static Object deserialize(File file) {
+    public Object deserialize(final File file) {
         Object obj = null;
-        try (ObjectInputStream input = new ObjectInputStream(new FileInputStream(file))) {
+        try (FileInputStream fis = new FileInputStream(file);
+                ObjectInputStream input = new ObjectInputStream(fis)) {
             obj = input.readObject();
         } catch (IOException | ClassNotFoundException | ExceptionInInitializerError ex) {
             System.out.println("ERROR load object!");
@@ -36,7 +38,7 @@ public static Object deserialize(File file) {
         return obj;
     }
 
-    public static Object deserialize(String path) {
+    public Object deserialize(final String path) {
         return deserialize(new File(path));
     }
 }

src/main/java/com/yurii/salimov/lesson09/task04/Files.java

@@ -9,24 +9,24 @@
  * @author Yuriy Salimov ([email protected])
  * @version 1.0
  */
-public class Files implements Serializable {
+public final class Files implements Serializable {
 
     private static final long serialVersionUID = 1L;
     private String name;
     private boolean isFile;
     private List<Files> list = new ArrayList<>();
     private Files fileSystem;
 
-    public Files(String name) {
+    public Files(final String name) {
         this.name = name;
     }
 
-    public Files(String name, boolean isFile) {
+    public Files(final String name, final boolean isFile) {
         this(name);
         this.isFile = isFile;
     }
 
-    public void add(Files file) {
+    public void add(final Files file) {
         if (!this.isFile) {
             if (!find(file)) {
                 file.fileSystem = this;

src/main/java/com/yurii/salimov/lesson09/task04/Main.java

@@ -15,15 +15,16 @@
 public class Main {
 
     public static void main(String[] args) {
-        Files fileSystem = new Files("c:");
-        File file = new File("List.txt");
+        final Serialization serialization = new Serialization();
+        final Files fileSystem = new Files("c:");
+        final File file = new File("List.txt");
 
         if (!file.exists() || !file.isFile() || file.length() == 0) {
-            Files file1 = new Files("file1", true);
-            Files file2 = new Files("file2", true);
+            final Files file1 = new Files("file1", true);
+            final Files file2 = new Files("file2", true);
 
-            Files dir1 = new Files("dir1", false);
-            Files dir2 = new Files("dir2", false);
+            final Files dir1 = new Files("dir1", false);
+            final Files dir2 = new Files("dir2", false);
 
             dir1.add(file1);
             dir2.add(file1);
@@ -38,10 +39,10 @@ public static void main(String[] args) {
             fileSystem.add(dir2);
             fileSystem.print();
 
-            Serialization.serialize(fileSystem, file);
+            serialization.serialize(fileSystem, file);
         } else {
-            fileSystem = (Files) Serialization.deserialize(file);
-            fileSystem.print();
+            final Files files = (Files) serialization.deserialize(file);
+            files.print();
         }
     }
 }

src/main/java/com/yurii/salimov/lesson09/task04/Serialization.java

@@ -1,32 +1,30 @@
 package com.yurii.salimov.lesson09.task04;
 
-import java.io.File;
-import java.io.FileInputStream;
-import java.io.FileOutputStream;
-import java.io.IOException;
-import java.io.ObjectInputStream;
-import java.io.ObjectOutputStream;
+import java.io.*;
+
 /**
  * @author Yuriy Salimov ([email protected])
  * @version 1.0
  */
-public class Serialization {
+public final class Serialization {
 
-    public static void serialize(Object obj, File file) {
-        try (ObjectOutputStream output = new ObjectOutputStream(new FileOutputStream(file))) {
+    public void serialize(final Object obj, final File file) {
+        try (FileOutputStream fos = new FileOutputStream(file);
+                ObjectOutputStream output = new ObjectOutputStream(fos)) {
             output.writeObject(obj);
         } catch (IOException ex) {
             System.out.println("ERROR save object!");
         }
     }
 
-    public static void serialize(Object obj, String path) {
+    public void serialize(final Object obj, final String path) {
         serialize(obj, new File(path));
     }
 
-    public static Object deserialize(File file) {
+    public Object deserialize(final File file) {
         Object obj = null;
-        try (ObjectInputStream input = new ObjectInputStream(new FileInputStream(file))) {
+        try (FileInputStream fis = new FileInputStream(file);
+                ObjectInputStream input = new ObjectInputStream(fis)) {
             obj = input.readObject();
         } catch (IOException | ClassNotFoundException | ExceptionInInitializerError ex) {
             System.out.println("ERROR load object!");
@@ -35,7 +33,7 @@ public static Object deserialize(File file) {
         return obj;
     }
 
-    public static Object deserialize(String path) {
+    public Object deserialize(final String path) {
         return deserialize(new File(path));
     }
 }