covert this code to GUI

import java.util.*;

class Author{

public String name;

public BookList<Book>books=new BookList<Book>();

public Author(){


}

public boolean equals(Object node){

return name.equals(((Author)node).name);


}

public void display(){

System.out.println(name);

books.display();


}

}

class Book {

public String title;

public Patron patron=null;

public Book(){


}

public boolean equals(Object node){

return title.equals(((Book)node).title);

}

public String toString(){

return " *"+title+(patron !=null?" -checked out to " +patron.name:"")+ "\n";

}

}

class CheckedOutBook{

public Author author= null;

public Book book=null;

public CheckedOutBook(){


}

public boolean equals(Object node){

return book.title.equals(((CheckedOutBook)node).book.title)&& 

author.name.equals(((CheckedOutBook)node).author.name);


}

public String toString(){

return " *"+author.name+","+book.title+"\n";


}

}

class Patron {

public String name;

public BookList<CheckedOutBook>books=new BookList<CheckedOutBook>();

public Patron (){


}

public boolean equals(Object node){

return name.equals(((Patron)node).name);

}

public void display(){

if(!books.isEmpty()){

System.out.println(name + "has the following books:");

books.display();


}

else System.out.println(name+ "has no books ");


}

} 

class AuthorList extends LinkedList<Author>{

static final long serialVersionUID=123;

public AuthorList(){

super();

}

public void display(){

Object[] authors=toArray();

for(int i=0;i<authors.length;i++)

((Author)authors[i]).display();

}

}

class BookList<T> extends LinkedList<T>{

static final long serialVersionUID=124;

public BookList(){

super();

}

public void display(){

for(int i = 0; i<size();i++)

System.out.println(get(i));

}

}

class PatronList extends LinkedList<Patron>{

static final long serialVersionUID=125;

public PatronList(){

super();

}

public void display(){

for(java.util.Iterator it = iterator();it.hasNext(););


}

}


class Library{

private ArrayList<AuthorList>

catalog= new ArrayList<AuthorList>('z'+1);

private ArrayList<PatronList>

people= new ArrayList<PatronList>('z'+1);

private String input;

Scanner kb= new Scanner(System.in);

public Library(){

for(int i =0; i<='z';i++){

catalog.add(i, new AuthorList());

people.add(i, new PatronList());


}


}

private String getString(String msg){

System.out.print(msg + " ");

System.out.flush();

input= kb.nextLine();

return input.substring(0,1).toUpperCase()+input.substring(1);

}

private void status(){

System.out.println("Library has the following books:\n ");

for(int i='A';i <='z';i++)

if (catalog.get(i).size()>0)

catalog.get(i).display();

}

private void includeBook(){

Author newAuthor= new Author();

int oldAuthor;

Book newBook= new Book();

newAuthor.name=getString("Enter Author's name: ");

newBook.title=getString("Enter the title of the book: ");

oldAuthor=catalog.get(newAuthor.name.charAt(0)).indexOf(newAuthor);

if(oldAuthor==-1){

newAuthor.books.add(newBook);

catalog.get(newAuthor.name.charAt(0)).add(newAuthor);

}

else( catalog.get(newAuthor.name.charAt(0)).get(oldAuthor)).

books.add(newBook);


}

private void checkedOutBook(){

Patron patron= new Patron(), patronRef;

Author author= new Author(), authorRef= new Author();

Book book= new Book();

int patronIndex, bookIndex= -1, authorIndex=-1;

patron.name=getString("Enter patron's names:");

while(authorIndex==-1){

author.name= getString("Enter author's name:");

authorIndex= catalog.get(author.name.charAt(0)).indexOf(author);

if(authorIndex==-1)

System.out.println("Misspelled author's name");


}

while(bookIndex==-1){

book.title=getString("Enter the title of the book: ");

authorRef=catalog.get(author.name.charAt(0)).get(authorIndex);

bookIndex=authorRef.books.indexOf(book);

if(bookIndex==-1)

System.out.println("Misspelled title:");

}

Book bookRef= authorRef.books.get(bookIndex);

CheckedOutBook bookToCheckOut=new CheckedOutBook();

bookToCheckOut.author=authorRef;

bookToCheckOut.book=bookRef;

patronIndex=people.get(patron.name.charAt(0)).indexOf(patron);

if(patronIndex==-1){

patron.books.add(bookToCheckOut);

people.get(patron.name.charAt(0)).add(patron);

bookRef.patron=people.get(patron.name.charAt(0)).getFirst();

}

else{

patronRef=people.get(patron.name.charAt(0)).get(patronIndex);

patronRef.books.add(bookToCheckOut);

bookRef.patron=patronRef;

}

}

private void returnBook(){

Patron patron=new Patron();

Book book= new Book();

Author author=new Author(),authorRef=new Author();

int patronIndex=-1 ,authorIndex=-1,bookIndex=-1;

while(patronIndex == -1){

patron.name=getString("Enter patron's name:");

patronIndex=people.get(patron.name.charAt(0)).indexOf(patron);

if(patronIndex==-1)

System.out.println("Patron's name misspelled");

}

while(authorIndex==-1){

author.name=getString("Enter author's name: ");

authorIndex=catalog.get(author.name.charAt(0)).indexOf(author);

if(authorIndex==-1)

    System.out.println("Patron's name misspelled");

    }


while(bookIndex==-1){

    book.title=getString("Enter the title of the book: ");

    authorRef=catalog.get(author.name.charAt(0)).get(authorIndex);

    bookIndex=authorRef.books.indexOf(book);

    if(bookIndex==-1)

    System.out.println("Misspelled title:");


    }

CheckedOutBook checkedOutBook=new CheckedOutBook();

checkedOutBook.author=authorRef;

checkedOutBook.book=authorRef.books.get(bookIndex);

(authorRef.books.get(bookIndex)).patron=null;

(people.get(patron.name.charAt(0)).get(patronIndex)).

books.remove(checkedOutBook);

}

public void run(){

while(true){

char option=getString("\nEnter one of the following options:\n"+"1. Include a book in the 

catalog\n"+"2. Check Out a Book\n"+"3. Return a Book\n"+"4. Status\n"+"5. Exit\n"+"Your 

Option:").charAt(0);

switch(option){

case'1': includeBook(); break;

case'2': checkedOutBook(); break;

case'3': returnBook(); break;

case'4': status(); break;

case'5': return; 

default: System.out.println("Wrong option, try again");

}

}

}

public static void main(String[]args){

(new Library()).run();

}

}