Question

Write a JAVA program that reads a text file.

Text file contains three lines.

Place each line in an array bucket location.

Add to the end of the array list.

Print the array.

Answer 1

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

public class ReadLinesFromFile {

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        System.out.print("Enter file name: ");
        File file = new File(in.nextLine());    // create a File object
        try {
            Scanner fin = new Scanner(file);    // open the file for reading
            // Just use fin as you would use a typical Scanner object to read in data
            ArrayList<String> lines = new ArrayList<String>();
            // loop three times
            for (int i = 0; i < 3; i++) {
                lines.add(fin.nextLine());  // read line from file and add it to lines ArrayList
            }
            // print ArrayList
            for (int i = 0; i < lines.size(); i++) {
                System.out.println(lines.get(i));
            }

            fin.close();    // close the file after using it.
        } catch (FileNotFoundException e) {
            System.out.println(file.getAbsolutePath() + " is not found!");
        }
    }
}