Entering an empty string
Hey everyone! I'm trying to make really basic Java program that will tell me if the string I enter is empty, but I get an error if I start the program an press enter without entering anything. Any help would be appreciated!
//Shawn Nuckles
//Firday, January 26, 2007
//This program is used to determine if a string is a number, word, or empty
import java.util.Scanner;
publicclass Lab3Part1
{
publicstaticvoid main(String[] args)
{
Scanner keyboard =new Scanner(System.in);
System.out.println();//skip a line
System.out.print("Enter a string: ");
String WordOrNumber = keyboard.nextLine();
char FirstChar = WordOrNumber.charAt(0);//Assign FirstChar to the first character in the string
int Length = WordOrNumber.length();//Find the length of the strong so we can determine which character is the last
char LastChar = WordOrNumber.charAt(Length - 1);//Assign LastChar to the last character in the string
if (WordOrNumber =="")
{
System.out.println("Empty string.");
}
elseif (Character.isDigit(FirstChar) && Character.isDigit(LastChar))
{
System.out.println("\"" + WordOrNumber +"\"" +" is a number.");
}
elseif (Character.isLetter(FirstChar) && Character.isLetter(LastChar))
{
System.out.println("\"" + WordOrNumber +"\"" +"is a word.");
}
elseif ((Character.isLetter(FirstChar) && Character.isDigit(LastChar)) || (Character.isDigit(FirstChar) && Character.isLetter(LastChar)))
{
System.out.println("\"" + WordOrNumber +"\"" +" is something else.");
}
}
}
