This week's book giveaway is in the OO, Patterns, UML and Refactoring forum. We're giving away four copies of Refactoring for Software Design Smells: Managing Technical Debt and have Girish Suryanarayana, Ganesh Samarthyam & Tushar Sharma on-line! See this thread for details.
Before reading next line of the Scanner, check whether they exist using hasNextLine() method. So all your below nextLine() should have a hasNextLine() check and the nextInt() should have hasNextInt() check.