[FIXED] How can I make sure that the user did not enter his/her entire name in the First Text Field named as "First Name"

Issue

This question says ask for the 'First Name' and the 'Last Name' from the user and then show the message Welcome with the full name of the user . also make sure that the user does not enter his/her full name in the first Text Field which asks for First Name only I thought that if the user enters his/her full name in the first text field , we can know that from the fact that he/she entered a space or (' ') or not . If not we can simply show the message Welcome + full name . However it didn't work the way I thought it would ... Can somebody help me with itenter image description here

Solution

There is actually a few ways you can do this, but if I understand your question correctly a simple way would be below, which is from http://math.hws.edu/javanotes/c2/ex6-ans.html and helped me understand Java more when I was learning it, you just would alter it to your needs.

code: public class FirstNameLastName {

public static void main(String[] args) {
    
    String input;     // The input line entered by the user.
    int space;        // The location of the space in the input.
    String firstName; // The first name, extracted from the input.
    String lastName;  // The last name, extracted from the input.
    
    System.out.println();
    System.out.println("Please enter your first name and last name, separated by a space.");
    System.out.print("? ");
    input = TextIO.getln();
    
    space = input.indexOf(' ');
    firstName = input.substring(0, space);
    lastName = input.substring(space+1);
    
    System.out.println("Your first name is " + firstName + ", which has "
                              + firstName.length() + " characters.");
    System.out.println("Your last name is " + lastName + ", which has "
                              + lastName.length() + " characters.");
    System.out.println("Your initials are " + firstName.charAt(0) + lastName.charAt(0));
    
}

}

edit: If this doesn't make sense I can give a better explanation with a better example with more detail.

More notes on similar problems. https://www.homeandlearn.co.uk/java/substring.html

Answered By - Lucas Dahl
Answer Checked By - Senaida (JavaFixing Volunteer)