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Thread: Need help with while loop

  1. #1
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    Default Need help with while loop

    This code will print out 1 user and total one at a time in a dialog box 3 times. Now the code is how is suppose to be. Now how would I use this same code to show in the same dialog box but all 3 names and total in one dialog box?

    Here is a quick output of how it should be. But not sure how to do it.

    Thanks



    mport javax.swing.JOptionPane;
    public class testing {
     
    	public static void main(String[] args){
     
    		Scanner input = new Scanner(System.in);
     
    		String name;
    		int kilowattsUsed;
    		double total;
     
    		int counter = 1;
    		while (counter < 4){
    			System.out.println("Enter name.");
    			name = input.next();
    			System.out.println("How much kilowatts used?");
    			kilowattsUsed = input.nextInt();
     
    			total = kilowattsUsed *.056;
    			counter = counter + 1;
     
    			String message = String.format("%s $%.02f",name,total);
                            JOptionPane.showMessageDialog(null,message);
     
    		}	
    	}
    }
    Last edited by anthony23415; February 6th, 2011 at 01:02 PM. Reason: put code with highlight tags


  2. #2
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    Default Re: Need help with while loop

    import javax.swing.JOptionPane;
    import java.util.Scanner;
     
    public class testing {
     
        public static void main(String[] args){
     
            Scanner input = new Scanner(System.in);
     
            String name = "";
            int kilowattsUsed = 0;
            double total = 0;
           String message = "";
     
            int counter = 1;
            while (counter < 4){
                System.out.println("Enter name.");
                name = input.next();
                System.out.println("How much kilowatts used?");
                kilowattsUsed = input.nextInt();
     
     
                total = kilowattsUsed *.056;
                counter = counter + 1;
               if (counter ==2)
    {
                message = String.format("%s $%.02f",name,total);
    }
     
    else
    {
    message = message + "\n" + String.format("%s $%.02f",name,total);
    }
     
     
            }  
    JOptionPane.showMessageDialog(null,message, "Message", JOptionPane.INFORMATION_MESSAGE);
        }
    }

    The "\n" causes it to skip a line so they aren't on the same line.
    The if and else make sure that there isn't an extra line made before the first user is entered
    The output is put after while loop so it will show only once instead of 3 times.
    message is defined and initialized before while loop so that it won't claim it can't find symbol or that it wasn't initialized after while loop exits.

    Ok...I tested it and it works.
    Last edited by javapenguin; February 6th, 2011 at 03:39 PM.

  3. The Following User Says Thank You to javapenguin For This Useful Post:

    anthony23415 (February 6th, 2011)

  4. #3
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    Default Re: Need help with while loop

    wow it worked, thanks a bunch javapenguin

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