Java program to Perform Invalid Name Using Exception.

//Java program to Perform Invalid Name Using Exception.

import java.io.*;

import java.util.*;

class list

{

                public static boolean isnumeric(String s)

                {

                                try

                                {

                                                Double d=Double.parseDouble(s);

                                                return true;

                                }

                catch(NumberFormatException e)

                                {

                                    return false;  

                                }

                }

                public static void main(String args[])

                {

                                String str[]={"Tamil","Telugu","Computer","77","7","77.7"};

                                Vector v=new Vector();

                                int i;

                                System.out.println("----- -------- ---");

                                System.out.println("Input Elements Are");

                                System.out.println("----- -------- ---");

                                for(i=0;i<str.length;i++)

                                {

                                                if(! isnumeric(str[i]))

                                                {

                                                                System.out.println(str[i]);

                                                                v.addElement(str[i]);

                                                }             

                                                else

                System.out.println(str[i]+" [Number is not allowed]");

                                               

                                }

                                System.out.println("-------------------");

                                System.out.println("Listed Elements Are");

                                System.out.println("-------------------");

                                System.out.println(v);

                                System.out.println("------- -----");

                                System.out.println("Reverse Order");

                                System.out.println("------- -----");

                                for(i=v.size()-1;i>=0;i--)

                                {

            System.out.println(v.elementAt(i));

                                                System.out.println("\n");

                                }       

                }             

               

}