public class book

$\{$ public String name,author;

int year;

public book$($String namei,String authori,int yeari$)$

$\{$name$=$namei;author$=$authori;year$=$yeari;$\}$

public book$($book bi$)$

$\{$name$=$bi$.$name;author$=$bi$.$author;year$=$bi$.$year;$\}$

public String toString$()$

$\{$String s$=$"book name $="+$name$+"$ book author $="+$author$+"$ publication year $="+$year$+"$

$"$;

return s;

$\}$

$\}$

import java.util.$*$;

public class library

$\{$

String name;

int number$\_$of$\_$books;

TreeMap book$\_$name $=$ new TreeMap$()$;

TreeMap author$\_$name $=$ new TreeMap$()$;

public library$($String kname$)$

$\{$name$=$kname;

number$\_$of$\_$books$=0$;

$\}$

public void add$($book b$)$

$\{$

book$\_$name.put$($b$.$name,b$)$;

author$\_$name.put$($b$.$author,b$)$;

number$\_$of$\_$books$=$book$\_$name.size$()$;

$\}$

public void remove$($book b$)$

$\{$

number$\_$of$\_$books$--$;

book$\_$name.remove$($b$.$name$)$;

author$\_$name.remove$($b$.$author$)$;

number$\_$of$\_$books$=$book$\_$name.size$()$;

$\}$

public String list$\_$with$\_$name$()$

$\{$String s$=$book$\_$name.values$().$toString$()$;

return s;

$\}$

public String list$\_$with$\_$author$()$

$\{$String s$=$author$\_$name.values$().$toString$()$;

return s;

$\}$

public String get$\_$with$\_$name$($String name$)$

$\{$String s$=$book$\_$name.get$($name$).$toString$()$;

return s;

$\}$

public String toString$\_$with$\_$name$()$

$\{$ String s$=$"Library name : $"+$name$+"$

$"$;

s$+=$"Total number of books : $"+$number$\_$of$\_$books$+"$

$"$;

s$+=$list$\_$with$\_$name$()+"$

$"$;

return s;

$\}$

public String toString$\_$with$\_$author$()$

$\{$ String s$=$"Library name : $"+$name$+"$

$"$;

s$+=$"Total number of books : $"+$number$\_$of$\_$books$+"$

$"$;

s$+=$list$\_$with$\_$author$()$;

return s;

$\}\}$

Add books to the library and print them out according to authors and according to names