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Thread: How to write a String name variable to store letters,dotes and spaces only in Java?

  1. #1
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    Default How to write a String name variable to store letters,dotes and spaces only in Java?

    Hi Java professionals,
    I am trying to write a program and the name variable can only store letters,dotes and spaces. But whenever I enter a space, the program doesn't work. Please help, thanks in advance and the following is my code.


    import java.util.Scanner; 
    import java.util.*; 
    public class Space 
    { 
    public static void main(String []args) 
    { 
    Scanner reader = new Scanner(System.in); 
    String name,email; 
    while(true) 
    { 
    System.out.print("Please enter your name:"); 
    name = reader.next(); 
    System.out.print("Please enter your email address:"); 
    email =reader.next(); 
    if(name.equals("Quit")) 
    { 
    System.out.println("Bye!"); 
    break; 
    } 
    if(name.matches("[^A-Za-z]+$")) 
    { 
    System.out.println("The name is invalid."); 
    } 
    } 
    } 
    }


  2. #2
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    Default Re: How to write a String name variable to store letters,dotes and spaces only in Java?

    You need to refer to the appropriate API when a method you're using is not achieving the desired results. Read the Scanner API for the next() method. Compare that to the nextLine() method.

  3. #3
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    Default Re: How to write a String name variable to store letters,dotes and spaces only in Java?

    The nextLine() method only works for one time. The program fails when there is a loop.

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