String title;

String publisher_name;

String published_date;

String content="";

ArrayList<String> author_name=new ArrayList<String>();

/*

*main function

*/

public static void main(String args[]) {

String title1=" ";

String publisher_name1=" ";

String published_date1="";

String content1="";

int n=0;

String str="";

//try block starts here

try{

Options option=new Options();

option.addOption("hp",false,"help");

option.addOption("hlp",false,"help");

CommandLineParser parser = new DefaultParser();

CommandLine cmd= parser.parse(option,args);

// str=cmd.getArgs()[0];

/*prints the help message here*/

if((cmd.hasOption("hp"))||(cmd.hasOption("hlp"))) {

System.out.println("this program gets an argument through commandline 'n' number of books. then reads n books from standard input"

+"and prints them on standard output");

if(args.length<=1){

// exit the program

System.exit(0);

}

} // close outer if block

else{

if(args.length<1){

//if user not gives option and value of n then prints this message.

System.out.println("this program gets an argument through commandline 'n' number of books. then reads n books from standard input"

+"and prints them on standard output");

System.exit(0);

}

} //close the outer else block

str=cmd.getArgs()[0];

n=Integer.parseInt(str);

}catch(Exception e){

//System.exit(0);

//if any erroy occurs it catches here

System.out.println(e);

}

int num=0;

Scanner sc1=new Scanner(System.in); /*create an instance of scanner object*/

Scanner sc=new Scanner(System.in);

CmdBook b[]=new CmdBook[n]; /* create arraylist of objects of class Book*/

for(int i=0;i<n;i++){

//initialise the array of objects

b[i]=new CmdBook();

}

for(int i=0;i<n;i++){

/* take input from standard input*/

System.out.println("enter the title of the book:");

title1=sc.next();

System.out.println("enter the name of publisher");

publisher_name1=sc.next();

System.out.println("enter published date");

published_date1=sc.next();

System.out.println("how many authors are");

num=sc1.nextInt();

ArrayList<String> author_name1=new ArrayList<String>(); /*create an ArrayList author_name1 */

for(int j=0;j<num;j++) {

/*take input */

System.out.println("enter authorname"+(j+1));

author_name1.add(sc.next());

}

System.out.println("enter contents of book:");

content1=sc.next();

/* call the method bookdetail with auguments which contains from

* standard input

*/

b[i].bookdetail(title1, publisher_name1, published_date1,content1, author_name1);

}

for(int i=0;i<n;i++){

/*call the methode printbook withe no aurgument*/

b[i].printbook();

}

} /*end of main function here*/

/* bookdetail method gets the book details and save in the respective variables*/

public void bookdetail(String tit , String pub, String dat, String cont, ArrayList<String> aut) {

title=tit;

publisher_name=pub;

published_date=dat;

author_name.addAll(aut);

content=cont;

} /*bookdetail method ends here*/

/*printbook method prints the n book details

* on the standard output

*/

public void printbook()

{

System.out.println("Title: "+title);

System.out.println("publisherName: "+publisher_name);

System.out.println("publisher_date: "+published_date);

System.out.println("Authors name: ");

for(int j=0;j<author_name.size();j++) {

System.out.println(" "+author_name.get(j));

}

System.out.println("content of book:"+content);

System.out.println("");

}