Write a java program that reads a text file containing integ

Write a java program that reads a text file containing integers, determines the average, and then outputs to a file every number in the input file greater than the average. Write to an output file named C13h1.txt.

Also, write another java program that reads a text file containing integers and displays the integer in reverse order.

Solution

Question 1:

ReadFileTest.java

import java.io.File;
import java.io.FileNotFoundException;
import java.io.PrintStream;
import java.util.ArrayList;
import java.util.Scanner;

public class ReadFileTest {

  
   public static void main(String[] args) throws FileNotFoundException {
       Scanner scan = new Scanner(System.in);
       System.out.print(\"Enter the file name: \");
       String fileName = scan.next();
       File file = new File(fileName);
       if(file.exists()){
           Scanner fileInput = new Scanner(file);
           ArrayList<Integer> list = new ArrayList<Integer>();
           while(fileInput.hasNextInt()){
               list.add(fileInput.nextInt());
           }
          
           int sum = 0;
           for(int n: list){
               sum = sum + n;
           }
           double average = sum/(double)list.size();
           PrintStream ps = new PrintStream(\"D:\\\\C13h1.txt\");
           for(int n: list){
                   if(average < n){
                       ps.println(n);
                   }
           }
           ps.flush();
           ps.close();
           System.out.println(\"File has been created\");
       }
       else{
           System.out.println(\"File does not exist\");
       }

   }

}

Output:

Enter the file name: D:\\\ ums.txt
File has been created

nums.txt

1 2 3 4 5 6 7 8 9 10

C13h1.txt

6
7
8
9
10

Question 2:

ReadFileAndDisplayReverse.java

import java.io.File;
import java.io.FileNotFoundException;
import java.util.ArrayList;
import java.util.Scanner;

public class ReadFileAndDisplayReverse {

  
   public static void main(String[] args) throws FileNotFoundException {
       Scanner scan = new Scanner(System.in);
       System.out.print(\"Enter the file name: \");
       String fileName = scan.next();
       File file = new File(fileName);
       if(file.exists()){
           Scanner fileInput = new Scanner(file);
           ArrayList<Integer> list = new ArrayList<Integer>();
           while(fileInput.hasNextInt()){
               list.add(fileInput.nextInt());
           }
          
           System.out.println(\"Numbers in reverse order: \");
           for(int i=list.size()-1; i>=0; i--){
               System.out.println(list.get(i));
           }
       }
       else{
           System.out.println(\"File does not exist\");
       }

   }

}

Output:

Enter the file name: D:\\\ ums.txt
Numbers in reverse order:
10
9
8
7
6
5
4
3
2
1