Joel Sanchez Joel Sanchez - 4 months ago 6x
Java Question

Method to find string inside of the text file. Then getting the following lines up to a certain limit

So this is what I have so far :

public String[] findStudentInfo(String studentNumber) {
Student student = new Student();
Scanner scanner = new Scanner("Student.txt");
// Find the line that contains student Id
// If not found keep on going through the file
// If it finds it stop
// Call parseStudentInfoFromLine get the number of courses
// Create an array (lines) of size of the number of courses plus one
// assign the line that the student Id was found to the first index value of the array
//assign each next line to the following index of the array up to the amount of classes - 1
// return string array

I know how to find if a file contains the string I am trying to find but I don't know how to retrieve the whole line that its in.

This is my first time posting so If I have done anything wrong please let me know.


You can do something like this:

File file = new File("Student.txt");

try {
    Scanner scanner = new Scanner(file);

    //now read the file line by line...
    int lineNum = 0;
    while (scanner.hasNextLine()) {
        String line = scanner.nextLine();
        if(<some condition is met for the line>) { 
            System.out.println("ho hum, i found it on line " +lineNum);
} catch(FileNotFoundException e) { 
    //handle this