Write a program that will find the standard deviation of a list of numbers found

Question

Write a program that will find the standard deviation of a list of numbers found in a file. Input Validation: No input validation required. Assume the input file will have the correct type of data. Requirements: The program must ask the user for the name of the file. You must have a method with the following header: public static double deviation (File inputFile) This method will take a File object as input and use File I/O to calculate and return the standard deviation of a series of numbers found inside of a file. You should create your own test files to test the functionality of your program. Sample Execution: Enter the name of the file: my_numbers.txt The standard deviation of the values in this file is: 78.29

Explanation / Answer

standard derivation number of alist of of found in a file:

import java.io.*;

public class Test2 {
  

public void check(String fname) {

System.out.println("Filename-->"+fname);

try {

BufferedReader in = new BufferedReader(new FileReader(fname));

String str;

while ((str = in.readLine()) != null) {

System.out.println(str);

}

in.close();

} catch (IOException e) {

}

}

/**
22
* @param args the command line arguments

*/

public static void main(String[] args) {
if (args.length < 1) {

System.out.println("Missing filename argument");

System.out.println("");

System.out.println("StatAnal <fname>");

System.out.println("");

} else {

String filename = args[0];

Test2 sa = new Test2();

sa.check(filename);
}
}
}

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