Scanner debugging help

[Haani Naz]

Hi there,

I have the following piece of code which fails at the point it needs to accept input and i can't seem to figure out why.

	public static void main(String[] args) {
		
		
		Scanner keyboard = new Scanner(System.in);
		
		
		MyLibrary ml = new MyLibrary("Haani's Library");
		
		//this won't print anything cos you haven't added any books
		ml.toString();
		
	    System.out.println("You have connected to " + ml.getName()+"..\n");
	    
	    
	    while(true){
	 //Main Menu   
	 System.out.println();
	 System.out.print("What would you like to do? \n" +
			 "\n"+
	 		"1. Add Books \n" +
	 		"2. Lend a book to a person \n" +
	 		"3. Check which Books are available \n" +
	 		"4. Exit \n" +
	 		
	 		"Enter choice [1 | 2 | 3 | 4]: ");
		
	 
	 
	 String option = keyboard.nextLine();
	 
	 
	 

		if (option.equals("1")){
			 
			 boolean cont=true;
			 
			 while(cont){
			 
			 
				 System.out.print("Enter name of Book: ");
				 String bookName= keyboard.nextLine();
				 
				 
				 
				 
			 
				System.out.print("Enter name of the Author for " + bookName + ":");
				 String bookAuthor=keyboard.nextLine();
			 
				 Book b1 = new Book(bookName);
				 b1.setAuthor(bookAuthor);
			 
				 ml.addBook(b1);
			 
				 System.out.println("Would you like to add another book? [y/n]");
				 String choice = keyboard.nextLine();
			 
				 if (choice.equals("y")){
				 
					 cont=true;
				 }
				 
				 else if (choice.equals("n"))
				 {
				 	cont=false;
				 
				 }
			 
			 
			 }//end-while
			
		}//end-if
	 
	 
		
		if(option.equals("2")){
			
			boolean contd = true;
			   //Print available books
		    ArrayList<Book> availableBooks = ml.getAvailableBooks();
			String input;
			
			//while (contd){
				
				Person p1 = new Person();
				
				System.out.print("Name of person lending book to: ");
				input = keyboard.nextLine();
				
				
				p1.setName(input);
				
				System.out.print("What is the maximum number of books to lend: ");
				int maxBooks = keyboard.nextInt();
				
				p1.setMaximumBoks(maxBooks);
				
				
				//add person to library
				ml.addPerson(p1);
				
			    			    
			 
				
			/*	System.out.println("The available books are..");
				
				for (Book book : availableBooks) {
					
					System.out.println(book);
				}*/
				

				System.out.println("Which book would you like to check out to " + p1.getName());
				input = keyboard.nextLine();
				
				
				System.out.println(input);
				
			/*******	
				//check if book name entered is in the database
				//if it is check it out - either successful or failed
				
				for (Book book : availableBooks) {
					
					if (book.title.equalsIgnoreCase(checkoutBook)){
						
						boolean result =ml.checkOut(book, p1);
						if(result==true){
							
							System.out.println("Check out: successful.");
						}
						else{
							System.out.println("Check out failed: Book has already been checked out or "
											+ p1.getName()
											+ " has reached Maximum book limit");
						}
				}//end-if: (book.title.equals("bookName"))
					
					
					else if (!(book.title.equalsIgnoreCase(checkoutBook))){
						
						System.out.println("Book doesn't exist");
						
					}
			}//end-for
				
				 System.out.println("Would you like to check out another book? [y/n]");
				 String choice = keyboard.nextLine();
			 
				 if (choice.equals("y")){
				 
					 contd=true;
				 }
				 
				 else if (choice.equals("n"))
				 {
				 	contd=false;
				 
				 }
				
				
				
			}//end-while
			    
			*******    */
				
				
			}//end-if

The issue is at line 115.


Here is the output:

What would you like to do? 

1. Add Books 
2. Lend a book to a person 
3. Check which Books are available 
4. Exit 
Enter choice [1 | 2 | 3 | 4]: 1
Enter name of Book: War and Peace
Enter name of the Author for War and Peace:Daffy Duck
Would you like to add another book? [y/n]
n

What would you like to do? 

1. Add Books 
2. Lend a book to a person 
3. Check which Books are available 
4. Exit 
Enter choice [1 | 2 | 3 | 4]: 2
Name of person lending book to: Haani 
What is the maximum number of books to lend: 4
Which book would you like to check out to Haani 


What would you like to do? 

1. Add Books 
2. Lend a book to a person 
3. Check which Books are available 
4. Exit 
Enter choice [1 | 2 | 3 | 4]: 

As you can see instead accepting input it skips it.

can somebody please tell me why?

thanks in advance!

[Anniruddh Rana]

  System.out.println("Which book would you like to check out to " + p1.getName());  
                input = keyboard.nextLine(); 

Change that to

  System.out.print("Which book would you like to check out to " + p1.getName());  
                input = keyboard.nextLine(); 

and give it a try.

i.e. use System.out.print there instead of System.out.println