Implement following java classes with appropriate constructor(s). Each class should override the toString method. in Java

 CabAppointment.java (this class extends Appointment class)
private int id;
private Address startAddress;
private Address destinationAddress;
private String terminal;
private String description;

Appointment.java
private Customer customer;
private long appointmentStartDateStamp;
private long appointmentEndDateStamp;
private float payment;
private String paymentMethod; 

Customer.java
private String name;
private long phone;
private String email;
private Address address; 

Address.java
private int number;
private String street;
private String city;
private String State;
private long zip; 

 // Complete the following class
public class ReadWriteRandomAccessFile {

public static CabAppointment read(RandomAccessFile raf) throws
IOException {
CabAppointment cabApointment = new CabAppointment();
// read fields from the file and popuplate the cabApointment object
cabApointment.setId(raf.readInt());
String name =
FixedLengthStringIO.readFixedLengthString(ICabAppointmentRecord.NAME_LENGTH,
raf);
cabApointment.getCustomer().setName(name);
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}

public static void write(CabAppointment cabApointment, RandomAccessFile
raf) throws IOException {
// write fields from cabApointment object to random access file
raf.writeInt(cabApointment.getId());
FixedLengthStringIO.writeFixedLengthString(cabApointment.getCustomer().getName(),
ICabAppointmentRecord.NAME_LENGTH, raf);
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}
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public interface ICabAppointmentRecord {
String CabAppointmentFile = "CabAppointmentFile.dat";
int NUMBER_LENGTH = 4;
int STREET_LENGTH = 15;
int CITY_LENGTH = 15;
int STATE_LENGTH = 15;
int ZIP_LENGTH = 8;
int ADDRESS_LENGTH = NUMBER_LENGTH + ZIP_LENGTH + (STREET_LENGTH +
CITY_LENGTH + STATE_LENGTH) * 2;
int NAME_LENGTH = 15;
int PHONE_LENGTH = 8;
int EMAIL_LENGTH = 30;
int CUSTOMER_LENGTH = PHONE_LENGTH + (NAME_LENGTH + EMAIL_LENGTH) * 2
+ ADDRESS_LENGTH;


int ID_LENGTH = 4;
int APPOINTMENT_START_DATE_LENGTH = 8;
int APPOINTMENT_END_DATE_LENGTH = 8;
int PAYMENT_LENGTH = 4;
int PAYMENT_METHOD_LENGTH = 12;
int APPOINTMENT_LENGTH = CUSTOMER_LENGTH + ID_LENGTH +
APPOINTMENT_START_DATE_LENGTH +
APPOINTMENT_END_DATE_LENGTH +
PAYMENT_LENGTH + (PAYMENT_METHOD_LENGTH * 2);

int TERMINAL_LENGTH = 15;
int DESCRIPTION_LENGTH = 30;

int SIZE_OF_CAB_APPOINTMENT = APPOINTMENT_LENGTH + (ADDRESS_LENGTH *
2) + (TERMINAL_LENGTH +
DESCRIPTION_LENGTH) * 2;
}

 import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;

public class FixedLengthStringIO {

/**
* Read fixed number of characters from a DataInput stream
*/
public static String readFixedLengthString(int size, DataInput in)
throws IOException {
// Declare an array of characters
char[] chars = new char[size];

// Read fixed number of characters to the array
for (int i = 0; i < size; i++) {
chars[i] = in.readChar();
}

return new String(chars);
}

/**
* Write fixed number of characters to a DataOutput stream
*/
public static void writeFixedLengthString(String s, int size,
DataOutput out) throws IOException {
if (s == null || s.length() <= 1) {
s = "NA";
}

char[] chars = new char[size];
try {
// Fill in string with characters
s.getChars(0, Math.min( s.length(), size), chars, 0);
} catch (Exception e) {
System.out.println(e);
}
// Fill in blank characters in the rest of the array
for (int i = Math.min(s.length(), size); i < chars.length; i++) {
chars[i] = ' ';
}

// Create and write a new string padded with blank characters
out.writeChars(new String(chars));
}
}