Write a Java program that reads file

Write a Java program that reads the file "X", and prints to the console the file update time, the list of marks for a given UB number and the corresponding “marks gained” value.
So far I have got this and not im totally stuck :/
Help!

Code:

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package textcopy;
import java.io.*;
/**
 * This class demonstrates the number of students matching the UB number criterion and the average mark.
 *
 * @author  MSheraz3
 */
public class TextCopy {
    public static void main(String[] args) throws IOException {
       
        BufferedReader reader = new BufferedReader(new FileReader(args[0]));
        BufferedWriter writer = new BufferedWriter(new FileWriter(args[1]));
       
            String line = null;
                while ((line=reader.readLine()) != null)
                if ( line.split(",")[0].matches("\\d*7\\d*") )
                { writer.write(line); writer.newLine(); }
                reader.close(); writer.close();
       
        double sum=0; int counter=0;
        { sum = sum+Integer.parseInt(line.substring(9)); counter = counter+1; }
       
        System.out.println("Students: "+counter+"\nAverage mark: "+sum/counter);
    }
}

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What are you stuck with? Please be more specific so others can help you quickly.

Quote:

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Originally Posted by nambill

What are you stuck with? Please be more specific so others can help you quickly.

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Can you please show me your way of how you would write this code & then i will alter mine according to what i need.
Thank you

Lesson: Basic I/O

Code:

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                public static void Save() {
                        File file = new File("Save.txt"); //Output files name
                       
                        try {
                               
                        Writer output = null;
                        output = new BufferedWriter(new FileWriter(file));
                        output.write(""); //Writes the File
                        output.close(); //Closes the output
                        //System.out.println("");
                       
                        }  catch(IOException e) {
                                e.printStackTrace();
                        }
                }
                public static void Read() {
                        try {
                                File file = new File("Save.txt");
                                BufferedReader reader = new BufferedReader(new FileReader(file));
                                String line = "";
                                while ((line = reader.readLine()) != null) {
                                        //System.out.println(line);
                                }
                                reader.close();
                                reader = null;
                        } catch (FileNotFoundException e) {
                                //The error should not show up, as of if the file doesn't exist, the void should just ignore it.
                        } catch (IOException e) {
                                e.printStackTrace();
                        }
                }

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Should work..

Thank you so much! had to do some alteration but its perfect now :)
Thanks again!

Quote:

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Originally Posted by Mehwish-S

Thank you so much! had to do some alteration but its perfect now :)
Thanks again!

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No problem sir, anytime.