Thread: How to Determine if a String is a Word or Number?

I need to write a program that determines whether a string inputted by the user is a word (all letters), a number (all digits), "something else" (starts with digit, ends with number, or vice versa), or an empty string. This is what I have so far:


import java.util.Scanner;

public class Lab3Part1 {

public static void main(String[] args) {

Scanner keyboard = new Scanner(System.in);

System.out.println("Enter a string: ");
keyboard.nextLine();
String userInput = keyboard.nextLine();

char c1 = userInput.charAt(userInput.length());
char c2 = userInput.charAt(userInput.length()-1);
Character.isDigit(c1);
Character.isDigit(c2);

if (userInput = )
{
System.out.println("\"" + userInput + "\" is a word");
}
else if (userInput = )
{
System.out.println("\"" + userInput + "\" is a number");
}

}

}


Where do I go from here? I don't know how to code for determining if a string is a word, number, something else, or empty. Please help! Thank you.

That's the thing...I don't know what steps to take. If YOU were writing a program like this, what would YOU do?

If what was written was a number, then I would say it was a number. If what was written was a letter, then I would say it was a letter.

I'd say the one with all the numbers is a number.

If I can only see one character at a time then I can only choose between whether it's a number or a letter.

If it was a numeric digit, then I would say so. If it wasn't, then I would say so.

I would state whether or not it was.

Ok, I've figured most of it now. I have one last question, though. If I enter a string of "Tab17" for example, what would I code so that the output says, "'Tab17' is something else"

?

Because it keeps coming up as either a number or word, even though the string starts with a number and ends with a digit (and vice versa).


Sorry for the double post.

It seems to be a problem with the boolean operators I'm using.