Address Book program in JAVA

package addressbook;

public class AddressBook

// This class defines an address book, consisting of 10 parts

{
// Class constant

final String PUNCT = ", "; // Punctuation for formatting

// Instance variable

String first;
String middle;
String last;
String homeadd;
String homeph;
String busadd;
String busph;
String faxnum;
String cellnum;
String pagenum;

// Constructors

public AddressBook(String firstName, String middleName, String lastName, String homeAddress, String homePhone, String businessAddress, String businessPhone, String faxNumber, String cellNumber, String pagerNumber)

// Init an Address Book object with all addressbook fields

{
first=firstName;
middle=middleName;
last=lastName;
homeadd=homeAddress;
homeph=homePhone;
busadd=businessAddress;
busph=businessPhone;
faxnum=faxNumber;
cellnum=cellNumber;
pagenum=pagerNumber;

}

// Basic observers that return the value of each feild

public String knowFirstName ()

{
return first;
}

public String knowMiddleName ()

{
return middle;
}

public String knowLastName ()

{
return last;
}
public String knowHomeAddress ()

{
return homeadd;
}
public String knowHomePhone ()

{
return homeph;
}
public String knowBusinessAddress ()

{
return busadd;
}
public String knowBusinessPhone ()

{
return busph;
}
public String knowFaxNumber ()

{
return faxnum;
}
public String knowCellNumber ()

{
return cellnum;
}
public String knowPagerNumber ()

{
return pagenum;
}

// Additional observers for first middle last format

public String firstMidLast ()

{
return first + " " + middle + " " + last;
}

public String lastFirstMid ()

{
return last + PUNCT + first + " " + middle;
}

    // Equals and CompareTo methods

public boolean equals (AddressBook otherName)
{
return
first.equals (otherName.first) &&
middle.equals (otherName.middle) &&
last.equals (otherName.last);
}

public int compareTo (AddressBook otherName)
{
int result;
result = last.toUpperCase().compareTo(otherName.last.toUpperCase());
if (result != 0)
return result;
else
{
result = first.toUpperCase().compareTo(otherName.first.toUpperCase());
if (result != 0)
return result;
else
return
result = middle.toUpperCase().compareTo(otherName.middle.toUpperCase());
}
}
}