I am working through a piece of self study, Essentially I am to ask the User for a string input such as "John, Doe" IF the string doesnt have a comma, I am to display an error, and prompt the user until the string does indeed have a comma (Fixed.). Once this is achieved I need to parse the string from the comma, and any combination of comma that can occur (ie John, doe
or John , doe
or John ,doe
) then using the Scanner class I need to grab John doe, and split them up to be separately printed later.
So far I know how to use the scanner class to grab certain amounts of string up to a whitespace, however what I want is to grab the "," but I haven't found a way to do this yet, I figured using the .next(pattern)
of the scanner class would be what I need, as the way it was written should do exactly that. however im getting an exception InputMismatchException doing so.
Here is the code im working with:
while (!userInput.contains(",")) {
System.out.print("Enter a string seperated by a comma: ");
userInput = scnr.nextLine();
if (!userInput.contains(",")) {
System.out.println("Error, no comma present");
}
else {
String string1;
String string2;
Scanner inSS = new Scanner(userInput);
String commaHold;
commaHold = inSS. //FIXME this is where the problem is
string1 = inSS.next();
string2 = inSS.next();
System.out.println(string1 + " " + string2);
}
}
This can be achieved simply by splitting and checking that the result is an array of two Strings
String input = scnr.nextLine();
String [] names = input.split (",");
while (names.length != 2) {
System.out.println ("Enter with one comma");
input = scnr.nextLine();
names = input.split (",");
}
// now you can use names[0] and names[1]
edit
As you can see the code for inputting the data is duplicated and so could be refactored
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