Thread: While Loop Problem :(

Hi....can any one please tell me where is the problem in my code? Actually a very simple thing i am trying to do here. User will enter 1/-1 from console. If the user enters -1 then the program will terminate and if the user enters 1 then some other activities will start......i am using the while loop as follows but that is not working:

in my MAIN method i have written:

int choice;
 
choice = DisplayMenu();
 
        while (choice!=-1){
 
        	System.out.println("\nI am inside while loop !\n");
 
        }          
   System.out.println("\nI am outside while loop ! Program ends...\n");

And in my DISPLAYMENU method i have written:

public static int DisplayMenu()        
{
    int choice = 0;
    System.out.println("\t\t\nPlease choose your option to deal with this system\n\t'1' -> To go into the while loop\n\t'-1' -> To terminate the program\n");
	choice = (int)console.next().indexOf(choice);
    return choice;
}

It is urgent....really i will be appreciated if any one can help me to run that while loop correctly and inform me where i was doing mistake...

Regards

try this

import java.io.Console;
 
public class DisplayMenu {
 
	public static int DisplayMenu() {
		int choice = 0;
		Console cons = System.console();
		System.out
				.println("\t\t\nPlease choose your option to deal with this system\n\t'1' -> To go into the while loop\n\t'-1' -> To terminate the program\n");
		String line = cons.readLine();
		Integer.parseInt(line);
		return choice = Integer.parseInt(line);
	}
 
	public static void main(String[] args) {
		DisplayMenu menu = new DisplayMenu();
 
		int choice;
 
		choice = menu.DisplayMenu();
 
		while (choice != -1) {
 
			System.out.println("\nI am inside while loop !\n");
 
		}
		System.out.println("\nI am outside while loop ! Program ends...\n");
	}
}

don't start this code inside an ide but only from a os-box with java DisplayMenu

Thanks a lot j2me64...Here i solved that problem in this way:

In the MAIN method i had written:

int choice;
 
choice = DisplayMenu();
 
        while (choice != -1){   	
        	System.out.println("\nI am inside while loop !\n"); 	
        }      
   System.out.println("\nThanks for using this program !\n");

And in the DISPLAYMENU method i had written:

public static int DisplayMenu()        // User-defined method to display a menu
{
    int choice;
    System.out.println(" Please select how you want to deal with the system\n '1' -> Go inside of the while loop\n '-1' -> Go outside of the while loop...Program Ends !\n");
 
    Scanner in = new Scanner(System.in);
    choice=in.nextInt();
 
    return choice;
}

And this is running exactly like the way i want too.......