solve: **Understanding and Implementing Custom Exceptions in Java**In a particular business, all documents are designated by one-character codes that indicate their classification: - **U** for Unclassified- **C** for Confidential- **P** for ProprietaryThese codes are prefixes for file names, preceded by an underscore. Example file names include `U_QuarterOneData.txt` or `P_Numbers.txt`.### TaskThe goal is to create an exception class called `InvalidDocumentCodeException`. This custom exception will be triggered when a document's designation does not match U, C, or P.### Implementation- **Driver Class**: Implement this exception in a Driver class that reads file names from the user.- When the program finds a file with an invalid code, it raises `InvalidDocumentCodeException`.- Catch this exception, output "This document has an invalid code.", and continue processing the remaining files.- The program terminates when the user inputs "DONE".### Example Execution**Sample Run #1:** Execution of the program```plaintextjava DriverEnter: file:name:U_JuneData.txtEnter: file:name:P_JulyData.txtEnter: file:name:C_AugustData.txtEnter: file:name:K_SeptemberData.txtThis document has an invalid code.Enter: file:name:C_OctoberData.txtEnter: file:name:DONE```### ExplanationThe sample run demonstrates entering multiple file names. When a file name starting with an invalid designation ('K_SeptemberData.txt' here, which starts with 'K') is detected, it triggers the exception and prints the error message. The program continues to request file names until "DONE" is entered, at which point it stops processing.This exercise is designed to emphasize the utility and implementation of custom exceptions to handle specific cases in Java programming.

Solution- The provided Java code requests the user's input on the file names. Code- import java.util.*;class InvalidDocumentCodeException extends Exception{//Function decLare class of exception public InvalidDocumentCodeException(String s){super(s);}}public class Main{//main classpublic static void main (String[] args) {Scanner in=new Scanner(System.in);//defining a ScaNner Class to read StringString s;while(true)//condition checking{try{System.out.print("Enter a string:");s=in.nextLine();//function that read string after //initialize its done then this function exist in nExt lineif(s.equals("DONE")) break;else if(s.charAt(0)=='U' || s.charAt(0)=='C' || s.charAt(0)=='P')//initialize The if else conditioncontinue;elsethrow new InvalidDocumentCodeException("This document has an invalid code");//function to declare an invalid code message}catch(InvalidDocumentCodeException e){//Function that Declares CaTch ExceptionSystem.out.println(e.getMessage());//function to get message}}}}Running code Output-

Engineering

Computer Science

signation starting with either U, C, or P, standing for unclassified, nfidential, or proprietary. These codes are put in the names of the files, the very beginning, followed by an underscore. example, a file might be named U_QuarterOneData.txt or P_Numbers.txt eate an exception class called InvalidDocumentCodeException, designed to be own when the designation for a document is not U, C, or P. plement this exception in a Driver class (in the same file) that asks the er for the names of files. When the program encounters a file with an invalid signation, it should throw an Invalid DocumentCodeException, catch it, and ndle it by printing, "This document has an invalid code." Then, it should ntinue processing files.

signation starting with either U, C, or P, standing for unclassified, nfidential, or proprietary. These codes are put in the names of the files, the very beginning, followed by an underscore. example, a file might be named U_QuarterOneData.txt or P_Numbers.txt eate an exception class called InvalidDocumentCodeException, designed to be own when the designation for a document is not U, C, or P. plement this exception in a Driver class (in the same file) that asks the er for the names of files. When the program encounters a file with an invalid signation, it should throw an Invalid DocumentCodeException, catch it, and ndle it by printing, "This document has an invalid code." Then, it should ntinue processing files.

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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