use DRJAVA and make sure it is work Assignment 5 Wild Card

use DRJAVA and make sure it is work

Assignment 5 - Wild Card

In computers the % character is sometimes used to represent wildcard characters that may be substituted for any set of characters. For instance, if you search a database of first and last names for \"% Jones\" your computer returns a list of all names in the database with the last name Jones.

For this assignment you will input a String that contains a single % character, then a second String. The % will be replaced by the second String. So for example, if the user enters the Strings \"d%g\" and \"in\", the program outputs ding.

The original String must contain only letters of the alphabet, capital or lowercase, spaces and tab, and a single %. Any additional %\'s can be treated as an invalid characters. The replacement String may be any legal String in Java.

If the first String does not contain a % \"Error: no %\" should be output.

If the first String contains anything other than letters of the alphabet, spaces or tabs then \"Error: Incorrect characters\" should be printed. If the first String does not have a % you do not have to check for incorrect characters, only \"Error: no %\" should be output.

Sample Run 1:

Enter the first String:
D%g
Enter the replacement String:
in
Ding

Sample Run 2

Enter the first String:
$Wild%$
Enter the replacement String:
Card
Error: Incorrect characters

NOTE: You MUST use the class name \"Main\" for this assignment. REMEMBER: you must SUBMIT your answer. Your assignment doesn\'t count as complete unless it has been submitted.

Solution

CODE:

import java.util.Scanner;

public class Main {

   public static void main(String[] args) {
       String s1,s2,choice;
       Scanner sc= new Scanner(System.in);
       do{

           System.out.println(\"Enter First String:\");
           s1=sc.nextLine();
           System.out.println(\"Enter replacement String:\");
           s2=sc.nextLine();

           //matches if string 1 contains only alphabets,spaces, tabs and a single %
           if(s1.matches(\"[a-zA-Z\\\\s\\\\t]+%[a-zA-Z\\\\s\\\\t]+\")){ //(a-zA-Z\\s\\t)%(a-zA-Z\\s\\t)
               System.out.println(s1.replace(\"%\", s2));
           }else{
               if(!s1.contains(\"%\")){
                   System.out.println(\"Error: no %\");
               }else{
                   System.out.println(\"Error: Incorrect characters\");
               }
           }

           System.out.println(\"\ Do you want to try again:[y/n]\");
           choice=sc.nextLine();
       }while(choice.equalsIgnoreCase(\"y\"));
       sc.close();
   }

}

OUPUT:

Enter First String:
d%e
Enter replacement String:
in
dine

Do you want to try again:[y/n]
y
Enter First String:
$W%d
Enter replacement String:
il
Error: Incorrect characters

Do you want to try again:[y/n]
y
Enter First String:
S%r%g
Enter replacement String:
in
Error: Incorrect characters

Do you want to try again:[y/n]
n