Java parsing string input

Question

I'm having problem parsing a particular input case. I'm using scanning class to deal with this. I tried using trim function but didn't seem to work. I guess one way to go about this is to use a Regular expression but how would I do that in this case? Any other solutions? The input I am having a problem with is :

55, 34, 12, 1

or

55, 34,      12, 1

Its when I put an input of spaces and not continuous commas.

This input will work:

55,34,12,1

My Code:

public class Excercise3


{

    public static double round(double value, int places) 
    {
        if (places < 0) throw new IllegalArgumentException();

        BigDecimal bd = new BigDecimal(value);
        bd = bd.setScale(places, RoundingMode.HALF_UP);
        return bd.doubleValue();
    }


    public static void main(String args[])
    {

        Scanner scan = new Scanner(System.in);  
       String test = scan.nextLine();   
     // String test = scan.next();      
        //test.trim();
        String delims = "[,]";        
        String[] strarray = test.split(delims);


        for (String str : strarray)
        {

            Integer numofWidgets = Integer.parseInt(str);

                if (numofWidgets > 0 && numofWidgets <= 12)
                {                               
                    System.out.print("The widgets will cost " + (round(((numofWidgets * 12.39) + 3), 2) + "\n"));
                }
                else if ( numofWidgets > 12 && numofWidgets <= 50 )
                {
                    if (numofWidgets > 30 )
                    {                       
                        System.out.print("The widgets will cost " + (round(((numofWidgets * 11.99) + 5), 2) + "\n"));
                    }
                    else
                    {

                        System.out.print("The widgets will cost " + (round(((numofWidgets * 11.99) + 3), 2) + "\n"));
                    }
                }
                else if (  numofWidgets > 50)
                {

                    System.out.print("The widgets will cost " + (round(((numofWidgets * 11.49) + 5), 2) + "\n"));
                }


        }               
        scan.close(); 

    }



}

Important fix:

String test = scan.nextLine();

Jigar Joshi · Accepted Answer · 2014-07-14 22:46:08Z

1

just split them by

String delims = ",";

and before parsing into it use trim()

Integer numofWidgets = Integer.parseInt(str.trim());

answered Jul 14, 2014 at 22:46

Jigar Joshi

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1 Comment

user3590149 Over a year ago

I have to change this line String test = scan.nextLine(); It works now!

Marco · Accepted Answer · 2014-07-14 23:09:07Z

0

You can also try replacing all the space in the string with

test = test.replace(" ","");

before splitting with split() method

This should transform your input in this way

55, 34,      12, 1 ---> 55,34,12,1

answered Jul 14, 2014 at 23:09

Marco

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1 Comment

user3590149 Over a year ago

I had to change this line String test = scan.nextLine(); it works now!

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