Part 1 is already completed(Codes are pasted at the bottom),need help on Part 2: Persistency please.
Update: Have updated Course and Student classes. The Course codesare pasted as image as it has exceeds the word limit.
Address.java
import java.io.Serializable;
import java.util.Objects;
public class Address implements Cloneable,Serializable {
private String town = null;
private String street = null;
private String post_code =null;
private int house_number;
public Address(){}
public Address(String town,Stringstreet,String post_code,int house_number) {
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