Write down a java program segment to do the following: -Open file file1 for read

Question

Write down a java program segment to do the following: -Open file file1 for reading which, as an example, has the following contents (an integer followed by different file names): 3 f1 f2 f3 f4 f5 f6 -Read the first integer from file1, and store its value in variable n. -Open the n^th file (for example, it would be f3 per contents of file1 in the above example) for writing. -Write "Bye" in the opened file and properly flush and close it. import java.util.*; import java.io.*; public class prog{public static void main(String []args){}}

Explanation / Answer

Hi, Please find my implementation.

please let me know in case of any issue.

import java.io.File;

import java.io.FileNotFoundException;

import java.io.PrintWriter;

import java.util.Scanner;

public class prog {

  

   public static void main(String[] args) throws FileNotFoundException {

      

       // Opening file1

       Scanner sc = new Scanner(new File("file1"));

      

       // reading integer

       int n = sc.nextInt();

      

       // reading nth file name

       String file = args[n];

       // now file has name of nth file name

       //opening file

       PrintWriter pw = new PrintWriter(new File(file));

      

       // writing "Bye" in file

       pw.println("Bye");

       pw.flush();

      

       pw.close();

   }

}

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