This Project can be used in hotels for daily purpose as it can handle all the operations performed inside a hotel like Customer Entry, Employee Entry, Management Details, Rooms Details, Allotement of rooms to Customers, Checking out of customer. History of all the customers is also saved and it does much more such kind of operations and I have written over more than 4000 lines of code by myself to design its UI as well as its middle and backend layer using Java Swing, Java and SQL queries.