fixes serialization unit test (#1837)

* adds serialization code

* fixes serialization unit test

core-java/src/main/java/com/baeldung/serialization/Person.java

@@ -0,0 +1,30 @@
+package com.baeuldung.serialization;
+import java.io.Serializable;
+
+public class Person implements Serializable {
+
+	/**
+	 * 
+	 */
+	private static final long serialVersionUID = 1L;
+
+	private int age;
+	private String name;
+
+	public int getAge() {
+		return age;
+	}
+
+	public void setAge(int age) {
+		this.age = age;
+	}
+
+	public String getName() {
+		return name;
+	}
+
+	public void setName(String name) {
+		this.name = name;
+	}
+
+}

core-java/src/test/java/com/baeldung/serialization/PersonTest.java

@@ -0,0 +1,35 @@
+package com.baeuldung.serialization;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.ObjectInputStream;
+import java.io.ObjectOutputStream;
+
+import org.junit.Test;
+
+public class PersonTest {
+
+	@Test
+	public void testPeron() throws IOException, ClassNotFoundException   {
+		Person p = new Person();
+		p.setAge(20);
+		p.setName("Joe");
+
+		FileOutputStream fileOutputStream = new FileOutputStream("yofile.txt");
+		ObjectOutputStream objectOutputStream = new ObjectOutputStream(fileOutputStream);
+		objectOutputStream.writeObject(p);
+		objectOutputStream.flush();
+		objectOutputStream.close();
+
+		FileInputStream fileInputStream = new FileInputStream("yofile.txt");
+		ObjectInputStream objectInputStream = new ObjectInputStream(fileInputStream);
+		Person p2 = (Person) objectInputStream.readObject();
+		objectInputStream.close();
+		assertTrue(p2.getAge() == p.getAge());
+		assertTrue(p2.getName().equals(p.getName()));
+	}
+
+}