here is the part of my program... My problem is when i pressed the key other than s,d,c,e.. the program will not display anything.... suppose the program should display out the default --> "System.out.println("Invalid Option! Try again..");" can anyone help me to debug this?????? PLEASE do { /**Call the clear screen method*/ clrScreen(); /**Display main menu and title*/ mainMenu(); /**Show the content of all categorys*/ //Parameter: 1 is refer to normal display //Parameter: 2 is refer to Daily Sales Collection showContent(cakeList, pastriesList, cookieList, 1); /**Get a user selection*/ option = selection(); /**Define the option*/ switch(option) { case 'S': case 's': { // if capital S or small s is pressed then the Sales function is called salesFunction(cakeList, pastriesList, cookieList); break; } case 'D': case 'd': { //is capital D or small d is pressed then the Daily Order function will be called orderFunction(cakeList, pastriesList, cookieList); break; } case 'C': case 'c': { //Collection Methods clrScreen(); subMenu(); showContent(cakeList, pastriesList, cookieList, 2); System.in.read(); System.in.read(); break; } case 'E': case 'e': { //Exit the program exit(); break; } default: { //If other then the above option, shown invalid option System.out.println("Invalid Option! Try again.."); break; } } } while (option != 'E' && option != 'e');