Question

Create two files, file1.csv and file2.csv

Write the following information in file1.csv:

Apple 1.69 001

Banana 1.39 002

Write the following information in file2.csv:

Apple 1.69 001

Carrot 1.09 003

Beef 6.99 004

You have two files, both of the two files have some information about products: • Read these two files, find out which products exist in both files, and then save these products in a new file. You can use the two files you created in Lab 1 as an example. If you use file1.csv and file2.csv from Lab 1, the result file will be:

•Result file:

Apple 1.69 001

8.5.0

Answer 1

JAVA Program to read two files, finding similar products that exist in both files and save it in a new file :

import java.io.File;//Importing all required modules
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.nio.file.StandardOpenOption;
import java.util.Scanner;

class JavaEg {
    public static void main(String[] args) throws IOException {
        
        Scanner input1 = new Scanner(new File("file1.csv"));//reading first file
        Scanner input2 = new Scanner(new File("file2.csv"));//reading second file

while(input1.hasNextLine() && input2.hasNextLine()){
    String first_file = input1.nextLine();   //reading lines on first file
    String second_file = input2.nextLine(); //reading lines on second file

    if(first_file.equals(second_file)){   //comparing lines of both files
        System.out.println("Similarities found: "+"\n"+first_file);
        String content = first_file+"\n";
        String path = "File3.csv"; //path of new output file
        try { //using try to write 
            Files.write(Paths.get(path), content.getBytes(), StandardOpenOption.APPEND); //writing similar contents to anew output file
        }catch (IOException e) { // using catch for exception
        }
    }
}
    }
}

File 1:

File 2:

Output File3:

The answer have been updated in Java language.