Added Java examples

Java/Java.iml

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+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>
+

Java/src/com/company/Array.java

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+package com.company;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+/**
+ * Created by Vova Moskalenko on 04.06.2017.
+ */
+public class Array {
+
+    public static void main(String[] args) {
+
+        ArrayList<Character> letters = new ArrayList();
+        letters.add('B');
+        System.out.println(letters);
+        letters.add(0, 'A');
+        System.out.println(letters);
+        letters.add('C');
+        System.out.println(letters);
+
+        String[] arr = {"C++", "JavaScript", "Python", "Haskell", "Swift"};
+        List<String> languages = Arrays.asList(arr);
+        System.out.print("length: " + languages.size() + " " + "languages[0]:" + " " + languages.get(0) + " "
+                + "languages[languages.length-1]:" + " " + languages.get(languages.size() - 1) );
+    }
+}

Java/src/com/company/ObjectAccess.java

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+package com.company;
+
+import java.lang.reflect.Field;
+
+/**
+ * Created by Vova Moskalenko on 03.06.2017.
+ */
+public class ObjectAccess {
+
+    private String name = "Marcus";
+    private String city = "Roma";
+    private int born = 121;
+
+    public ObjectAccess() {}
+
+    public String getCity() {return city;}
+
+    public void setCity(String city) {this.city = city;}
+
+    public static void main(String[] args) throws Exception {
+
+        ObjectAccess person = new ObjectAccess();
+        System.out.println("Person name is: " + person.name);
+        System.out.println("Person name is: " + person.getClass().getDeclaredField("name").get(person));
+
+        person.name = null;
+        Field arr[] = person.getClass().getDeclaredFields();
+        for (int i = 0; i < arr.length; i++) {
+            System.out.println(arr[i].get(person));
+        }
+
+        person.setCity(null);
+        for (int i = 0; i < arr.length; i++) {
+            System.out.println(arr[i].get(person));
+        }
+
+        //with getter
+        System.out.println(person.getCity());
+    }
+}

Java/src/com/company/Objects.java

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+package com.company;
+
+public class Objects {
+    //our prewritten fields
+    private String name;
+    private String city;
+    private int born;
+
+    public Objects() {}
+
+    public Objects(String name, String city, int born) {
+        this.name = name;
+        this.city = city;
+        this.born = born;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public void setCity(String city) {
+        this.city = city;
+    }
+
+    public void setBorn(int born) {
+        this.born = born;
+    }
+
+    public static void main(String[] args) {
+
+        Objects obj1 = new Objects();
+        obj1.name = "Marcus";
+        obj1.city = "Roma";
+        obj1.born = 121;
+
+        //creating the object using constructor
+        Objects obj2 = new Objects("Marcus", "Roma", 121);
+
+        //creating the objects using inner methods
+        Objects obj3 = new Objects();
+        obj3.setName("Marcus");
+        obj3.setCity("Roma");
+        obj3.setBorn(121);
+    }
+}

Java/src/com/company/Serialization.java

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+package com.company;
+
+import java.io.*;
+
+/**
+ * Created by Vova Moskalenko on 04.06.2017.
+ */
+public class Serialization implements java.io.Serializable {
+
+    String name = "Marcus";
+    String city = "Roma";
+    int born = 121;
+
+    public static void main(String[] args) {
+
+        Serialization person = new Serialization();
+        //serialization
+        try {
+            FileOutputStream fileOut =
+                    new FileOutputStream("person.txt");
+            ObjectOutputStream out = new ObjectOutputStream(fileOut);
+            out.writeObject(person);
+            out.close();
+            fileOut.close();
+            System.out.printf("Serialized data is saved in person.txt");
+        }catch(IOException i) {
+            i.printStackTrace();
+        }
+
+        Serialization person2 = null;
+        //deserialization
+        try {
+            FileInputStream fileIn = new FileInputStream("person.txt");
+            ObjectInputStream in = new ObjectInputStream(fileIn);
+            person2 = (Serialization) in.readObject();
+            in.close();
+            fileIn.close();
+        }catch(IOException i) {
+            i.printStackTrace();
+            return;
+        }catch(ClassNotFoundException c) {
+            System.out.println("Serialization class not found");
+            c.printStackTrace();
+            return;
+        }
+
+        System.out.println("Deserialized person...");
+        System.out.println("Name: " + person.name);
+        System.out.println("City: " + person.city);
+        System.out.println("Born: " + person.born);
+
+    }
+}