Question

Java

This assignment will give you practice with line based file processing and scanner methods.

Modify the Hours program we did in class. You are going to write a program that allows the user to search for a person by ID. Your program is required to exactly reproduce the format and behavior of the log of execution as follows:

  Enter an ID: 456
  Brad worked 36.8 hours (7.36 hours/day)

  Do you want to search again? y

  Enter an ID: 293
  ID #293 not found

  Do you want to search again? y

  Enter an ID: Kim
  ID is not valid

  Do you want to search again? nope

  Have a nice day! 

At minimum, your program should have the following static methods in addition to method main: /* Your submission should have the exact same method headers as follows */

• A method to find person information and return the line of data for the person. The method will return an empty string if the person data is not found in the file. The Scanner input is the connection to the file. You need to establish the connection before you call findPerson. Also you need to ask the user for the searchId number as well.

   public static String findPerson(Scanner input, int searchId) {

• A method to calculate the total hours worked by the person and outputs their info. Here the line will be the person data extracted from the file matching the search id.

   public static void processLine(String line) {

When you ask the user whether or not to search again, you should use the “next()” method of the Scanner class to read a one-word answer from the user. You should continue playing if this answer begins with the letter “y” or the letter “Y”. Notice that the user is allowed to type words like “yes”. You are to look just at the first letter of the user’s response and see whether it begins with a “y” or “n” (either capitalized or not) to determine whether to play again.

hours file

123 Kim 12.5 8.1 7.6 3.2
456 Brad 4 11.6 6.5 2.7 12
789 Stef 8 7.5
012 Nancy 3 9 2.5 4.5 1.5 1
345 Kevin 40
678 Dayne 1.5 2.0 3.5 4.5 5.0
901 Iva 9 8.5 7 6.5 5 4.5
234 Jordan 0 0 0 1 0 0 0
567 Gabe 5.0 3.0 2.5
890 Lisa 12.5 16.5

Answer 1

ANSWER:-

CODE:-

import java.io.*;
import java.util.*;
class FileReading{
   public static String findPerson(Scanner input, int searchId){
       // This function searches seachId in file
       // If it is found that line will be returned
       // else empty string will be returned
       while(input.hasNext()){
           String p = input.nextLine();
           String[] person = p.split("\\s+");
           int id = Integer.parseInt(person[0]);
           if(id == searchId)
               return p;
       }
       return "";
   }
   public static void processLine(String line){
       // This funtion processes line
       // prints output in required format
       String[] values = line.split("\\s+");
       String name = values[1];
       double totalHours = 0.0;
       double avg;
       if(values.length>1){
           for(int i=2;i<values.length;i++){
               totalHours += Float.parseFloat(values[i]);
           }
           avg = totalHours/(values.length-2);
           System.out.printf("%s worked %.1f hours (%.2f hours/day)\n\n",name,totalHours,avg);
       }
   }
   public static void main(String[] args) {
       try{
           // make a connection to file using Scanner
           Scanner input = new Scanner(new File("hours.txt"));
           // create another scanner object
           // for reading input from user
           Scanner sc = new Scanner(System.in);
           String ch;
           int id;
           do{
               try{
                   // Ask user to enter ID
                   System.out.print("\nEnter an ID: ");
                   id = sc.nextInt();
                   String line = findPerson(input,id);
                   if(line.length()>0){
                       processLine(line);
                   }else{
                       System.out.println("ID #"+id+" not found\n");
                   }
               }catch (Exception e) {
                   System.out.println("ID is not valid\n");
               }
               sc.nextLine();
               System.out.print("Do you want to search again? ");
               ch = sc.nextLine();
               ch = ch.toLowerCase();
           }while(ch.charAt(0)!='n');  
           System.out.println("\nHave a nice day!");
       }catch (Exception e) {
           System.out.println(e);
       }
   }
}

hours.txt:-

123 Kim 12.5 8.1 7.6 3.2
456 Brad 4 11.6 6.5 2.7 12
789 Stef 8 7.5
012 Nancy 3 9 2.5 4.5 1.5 1
345 Kevin 40
678 Dayne 1.5 2.0 3.5 4.5 5.0
901 Iva 9 8.5 7 6.5 5 4.5
234 Jordan 0 0 0 1 0 0 0
567 Gabe 5.0 3.0 2.5
890 Lisa 12.5 16.5

NOTE:- To execute this without error, java file and txt should be in same directory. otherwise it shows file not found exception. or else you need give txt file's path in scanner object.

NOTE:- If you need any modifications in the code,please comment below.Please give positive rating.THUMBS UP.

                  THANK YOU!!!!

OUTPUT:-