runs once only

hi I am building a program but when it does a job and returns to menu it wont accept any input like the scanner was not initialised can anyone see why not it will do it once but as soon as it returns to menu it stops second set of eyes would be much appreciated

//This program will provide a menu system for inputting
//data regards 3 taxi's
import java.util.Scanner;//importing the scanner utility


class c22taxis
{
public static void menu() //This method will be called by the main method later
{
//printing of the system menu on screen to user
System.out.println("Welcome to C22 Taxis automated System");
System.out.println("");// blank line
System.out.println("Please select from a option below to continue.");
System.out.println("");// blank line
System.out.println(" 1. Enter/Change Driver Name.");
System.out.println("");// blank line
System.out.println(" 2. Enter/Change veichle booking status.");
System.out.println("");// blank line
System.out.println(" 3. Enter/Change veichle service status.");
System.out.println("");// blank line
System.out.println(" 4. List all veichle status");
System.out.println("");// blank line
System.out.println(" 5. Exit");//exit command for program
System.out.println("");
System.out.print("Please select a option: ");
}
public static void main (String[]args)
{
//initialising the scanner
Scanner input = new Scanner(System.in);

//creating/initialising the variables
String taxi1, taxi2,taxi3;
String [] name = new String[3];//name array useable upto as many names as required
String [] dest = new String [3];//array for destination again as many taxis as required
int choice = 0, preference;
int tNo = 0;


menu();//calling the method /main menu

preference = input.nextInt();


if (preference == 1)// path of input from user
{
System.out.println('\f');
// sub menu for driver change details
System.out.println(" Driver name sub Menu");
System.out.println("");
System.out.println("");
System.out.print("Please enter taxi number: ");
tNo = input.nextInt();//instruction for user to input number
//if/else relating to choice made in sub menu will then prompt user for tsxi no. and then name
//name then goes in relevant array position.

switch (tNo)
{
case 1:
System.out.print("Please enter drivers name: ");
name[0] = input.next();
break;
case 2:
System.out.print("Please enter drivers name: ");
name[1] = input.next();
break;

case 3:
System.out.print("Please enter drivers name: ");
name[2] = input.next();
break;

//the default
default:
System.out.print("invalid entry return to menu.");
break;
}
menu();
}
else if (preference == 2)
{
System.out.println('\f');
//sub menu start for taxi status
System.out.println(" Taxi status sub Menu");
System.out.println("");
System.out.println("");
System.out.print("Please enter taxi number: ");
tNo = input.nextInt();//instruction for user to input number
//if/else relating to choice made in sub menu will then prompt user for taxi status
//status will then go in relevant array position.

if (tNo == 1)
{
System.out.print("Please enter taxi1 estination(if no destination enter NONE): ");
dest[0] = input.next();
}
else if (tNo ==2)
{
System.out.print("Please enter taxi2 destination(if no destination enter NONE): ");
dest[1] = input.next();
}
else if (tNo ==3)
{
System.out.print("Please enter taxi3 destination(if no destination enter NONE): ");
dest[2] = input.next();
} //else instruction at end giving invalid input for anything other
else
System.out.println("Invalid entry please restart");

}

else
System.out.println("end program");
menu();
}
}

well idk what was wrong , but when i was messing around with the code i some how fixed it . i also changed how u have the select taxi number . cause when i first ran though it w/o really reading it , i put a name were it needed the number and just blew up XP , so its now a little different

Code :

---

package test;
 
//This program will provide a menu system for inputting
//data regards 3 taxi's
import java.util.Scanner;//importing the scanner utility
 
public class c22taxis {
	static int preference;
	static Scanner input = new Scanner(System.in);
	static String[] name = new String[3];
	static String[] dest = new String[3];
	static int tNo = 0;
 
	public static void main(String[] args) {
		menu();// calling the method /main menu
	}
 
	public static void menu(){
 
		// printing of the system menu on screen to user
		System.out.println("Welcome to C22 Taxis automated System");
		System.out.println("");// blank line
		System.out.println("Please select from a option below to continue.");
		System.out.println("");// blank line
		System.out.println(" 1. Enter/Change Driver Name.");
		System.out.println("");// blank line
		System.out.println(" 2. Enter/Change veichle booking status.");
		System.out.println("");// blank line
		System.out.println(" 3. Enter/Change veichle service status.");
		System.out.println("");// blank line
		System.out.println(" 4. List all veichle status");
		System.out.println("");// blank line
		System.out.println(" 5. Exit");// exit command for program
		System.out.println("");
		System.out.print("Please select a option: ");
		mainAsk();
	}
	public static void mainAsk(){
		preference = input.nextInt();
 
		if (preference == 1)// path of input from user
		{
			System.out.println('\f');
			// sub menu for driver change details
			System.out.println(" Driver name sub Menu");
			System.out.println("");
			System.out.println("");
			System.out.print("Please enter taxi number: ");
 
			String tNo2 = input.next();    // Changed so that if some1 puts in a non-int 
			if (tNo2.contains("1") || tNo2.contains("2") || tNo2.contains("3")){
				tNo = Integer.parseInt(tNo2);
			} else {
				tNo = 0;
			}
 
			switch (tNo) {
			case 1:
				System.out.print("Please enter drivers name: ");
				name[0] = input.next();
				break;
			case 2:
				System.out.print("Please enter drivers name: ");
				name[1] = input.next();
				break;
 
			case 3:
				System.out.print("Please enter drivers name: ");
				name[2] = input.next();
				break;
 
			// the default
			default:
				System.out.print("invalid entry return to menu.");
				break;
			}
			menu();
		} else if (preference == 2) {
			System.out.println('\f');
			// sub menu start for taxi status
			System.out.println(" Taxi status sub Menu");
			System.out.println("");
			System.out.println("");
			System.out.print("Please enter taxi number: ");
 
			String tNo2 = input.next();    // Changed so that if some1 puts in a non-int 
			if (tNo2.contains("1") || tNo2.contains("2") || tNo2.contains("3")){
				tNo = Integer.parseInt(tNo2);
			} else {
				tNo = 0;
			}
 
			if (tNo == 1) {
				System.out
						.print("Please enter taxi1 destination(if no destination enter NONE): ");
				dest[0] = input.next();
			} else if (tNo == 2) {
				System.out
						.print("Please enter taxi2 destination(if no destination enter NONE): ");
				dest[1] = input.next();
			} else if (tNo == 3) {
				System.out
						.print("Please enter taxi3 destination(if no destination enter NONE): ");
				dest[2] = input.next();
			} // else instruction at end giving invalid input for anything other
			else
				System.out.println("Invalid entry please restart");
				menu();
		}
 
		else
			System.out.println("end program");
			System.exit(0);
	}
}

---

i only changed a few things , but some things i would change if i hadn't got it to work so easily was change the long if else on the main menu to a case , and have each case call a method for it .

Code :

---

switch (preference) {
   case 1:
      this.changeName();
   ....
}
 
private void changeName(){
    the actions to change the name 
}

---

also , in future posts , please use the code tags . the button to auto add them is # ,then just paste the code between them

so when adding a third submenu can i just copy and paste submenu 2 and change where it stores the information entered eg another array.

And big thanks to i spent nearly 2 hours yesterday and was considering head banging as a new hobby