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Dame Leta
execption handling
1 Answer(s)      2 years and 8 months ago
Posted in : Java Beginners


I have the following form(as example).

Name:_____ Id number:____

I want to handle that as if one enter numbers in place of name,my program says please enter only character place of the name.

How I should do????????

Dame Leta

From Ethiopia,Jimma University, Department of Computer Science.


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View Answers

March 20, 2012 at 5:42 PM


import java.util.*;
import java.util.regex.*;

class RegularExpressions {

        public static boolean validateName(String name) {
                return name.matches("\\p{Upper}(\\p{Lower}+\\s?)");
        }

        public static boolean isNumeric(String str){
         return str.matches("-?\\d+(.\\d+)?");
}


        public static void main(String[] args) {
                Scanner input = new Scanner(System.in);
                System.out.print("Enter Name: ");
                String name = input.nextLine();
                while (validateName(name) != true) {
                        System.out.print("Invalid Name(Name and Surname shoulb be started with capitals with space between name and surname)!");
                        System.out.println();
                        System.out.print("Re-Enter Name: ");
                        name = input.nextLine();
                }
                System.out.print("Enter ID: ");
                String  id = input.next();
                while(isNumeric(id) != true) {
                        System.out.print("Invalid ID!");
                        System.out.println();
                        System.out.print("Re-Enter ID: ");
                        id = input.next();
                }

        }
}


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