Question

Mr Allen is selling 5 sets of western food in restaurant. He wants to build a food ordering system. So if the system has added 5 sets of western food inside the text file, how to use search function to search the foods from the text file by using(( JAVA )) and display it ?

Answer 1

CODE (AS TEXT) ->

import java.io.File;
import java.util.Scanner;
import java.util.ArrayList;
  
public class Solution3
{
   public static void main(String[] args) throws Exception
   {
       File file = new File("C:\\Users\\ishu\\Desktop\\menu.txt"); // creating a new file object to read the input file
       Scanner s=new Scanner(file); // scanner object is created which reads the file
      
       ArrayList<String> menu=new ArrayList<String>(); // list to store the menu items
       String searchItem="Cheesy Rice and Broccoli Casserole";
         
       while(s.hasNextLine()) // loop terminates when there is no new line in the file
       {
           String nextItem=s.nextLine(); // next item of the menu (read from text file)
           menu.add(nextItem); // the read item is added in the list
             
           if(searchItem.contentEquals(nextItem)) //if the desired item is found
               System.out.println("Your item : " +searchItem+ " is found in the menu");
       }
         
       System.out.println("The entire menu is : "); // to print the entire menu
       System.out.println(menu);
   }
}

OUTPUT (ALONG WITH TEXT FILE) ->

CODE (IN THE CODE SNIPPET)  ->

import java.io.File; 
import java.util.Scanner; 
import java.util.ArrayList;
  
 public class Solution3
 {
         public static void main(String[] args) throws Exception
         {
                 File file = new File("C:\\Users\\ishu\\Desktop\\menu.txt");         // creating a new file object to read the input file
                 Scanner s=new Scanner(file);                                        // scanner object is created which reads the file
                
                 ArrayList<String> menu=new ArrayList<String>();                     // list to store the menu items
                 String searchItem="Cheesy Rice and Broccoli Casserole";
                 
                 while(s.hasNextLine())                                              // loop terminates when there is no new line in the file
                 {
                         String nextItem=s.nextLine();                                   // next item of the menu (read from text file)
                         menu.add(nextItem);                                             // the read item is added in the list
                         
                         if(searchItem.contentEquals(nextItem))                          //if the desired item is found
                                 System.out.println("Your item : " +searchItem+ " is found in the menu");
                 }
                 
                 System.out.println("The entire menu is : ");                         // to print the entire menu
                 System.out.println(menu);
         }
 }

NOTE ->

(i) i gave you code twice once as text and once in the code snippet because some students complaint about adding of extra invisible character in code , so i gave you code twice once a code and once as text , whatever works for you.

(ii) please change the name and location of the text file according to your file otherwise it may give you error.

I HOPE YOU WILL GET IT..............YOUR RESPONSE WILL BE HIGHLY APPRECIATED.