Question

Write a method that asks the user to enter a list of names and ages using Gui input and splits the info into an array of String. Validate that every other string is an int and check the value to ensure it is between 21 and 65 inclusive, print a message to the standard error object if not. Return the array. Use regular expressions to split and validate. Must follow java conventions and indent. In java with good indentations please

Answer 1

import javax.swing.JOptionPane;//this is to use GUI
import java.util.*;//It is imported for scanner function
public class Main {
   public static String[] input(int n)
   {
       String name, age1,element;
       //age1 is string formate
       int age;
       //age is to store integer type of age1
       String[] a=new String[n];
       //string array
       try{
           for(int i=0;i<n;i++)
           {
               //taking gui input from user
               name= JOptionPane.showInputDialog("Name of person"+(i+1));
               age1 = JOptionPane.showInputDialog("age of person"+(i+1));
               age = Integer.parseInt(age1);
               if(age<21 || age>65)
                   //checking wheather the age is valid or not
               {
                   System.err.println("Invalid age:");
                   break;
               }
               else
               {
                   //storing the string in array
                   element=name+"-"+age;
                   a[i]=element;

               }

           }
       }
       catch(Exception e)
       {
           System.out.println(e+"\n please enter valid inputs");
       }
       finally{
       return a;//returning the array
       }  
   }

  
   public static void main(String[] args) {
      
       int n;
       Scanner ob=new Scanner(System.in);
       System.out.println("Enter no of names");
       n=ob.nextInt();//taking the number of names
       String a[]=input(n);
       System.out.println("Name\t age");
       try{
           for(int i=0;i<a.length;i++)
           {//regular expressions to split and validate
               String str = a[i];
       String[] arrOfStr = str.split("-", 5);
  
       for (String ar : arrOfStr)
       {
           //printing the splited string
          System.out.print(ar+"\t");
       }
       //to get in next line
       System.out.println();

           }
       }
       catch(Exception e)
       {
           //to print what exception raised
           System.out.println(e+" you entered invalid age");
       }

      
              
       System.exit(0);
       //terminate the programe
      
   }
}

Input X ? Name of person4 OK Cancel

gui for taking name of the person

Input х ? age of person5 OK Cancel

Gui for taking age of the person

C:\Users\sivaram\Desktop>javac Main.java C:\Users\sivaram\Desktop>java Main Enter no of names 5 age 54 34 Name Siva ram sai Gopal krish 56 35 63