Inputting a sorted file, unsorting it, then outputting the unsorted file (Java)

Question

This project is supposed to have 3 separate main classes. It inputs a file of a list of countries that is sorted alphabetically, it outputs an unsorted file with lines rearranged randomly.

My first main class looks like this:

package assignment3;
import java.io.PrintWriter;
import java.io.File;
import java.util.Scanner;

public class Assignment3 {`

public static void main(String[] args) throws Exception{
    Scanner stdIn = new Scanner(new File("C:/Users/Vicki/Desktop/CountrySortedFormat.txt"));
    PrintWriter out = new PrintWriter("C:/Users/Vicki/Desktop/CountryUnsortedFormat.txt");

    String[] line = new String[238];
    while (stdIn.hasNextLine()){    
        for (int k = 0; k <= line.length-1; k++){
            line[k]=stdIn.nextLine();
            out.println(line[k]);
            out.close();
        }
    }  
}
}

My code doesn't have any visible problems but I tried printing out the array and got an array of "null". Am I doing something wrong?

EDIT: changed PrintWriter file name to CountryUnsortedFormat

Answer 1

Beside what @Jens says you have this problems too :

There multiple problem with your code. first of all, you have this line:

while (stdIn.hasNextLine())

so why there is this line?

for (int k = 0; k <= line.length-1; k++)

you have a loop already, and you dont need the second loop.

Also you close the output in every loop! What is that?

out.close();

you just need to close it in the end of the function!

your loop should be something like this :

int k = 0;
while (stdIn.hasNextLine()) {
    // for (int k = 0; k <= line.length - 1; k++) {
    line[k] = stdIn.nextLine();
    out.println(line[k]);
    k++;
    // }
}
out.close();

Also after something like this your output is sorted, you didnt do any thing to make output unsorted.