Week 3: Objects, files and exceptions/16a Files and exceptions

Read from a file in Java
- can use Scanner class - BUT read from file
- and endpoint is known (for a file)
vs
- cuz Scanner usu reads from keyboard - System.in stream





eg
names.txt
Jack
Jane
Pia
Pete
Andrew
Ann
Lisa
Larry



// read contents of the file - names.txt
import java.io.File;
import java.util.Scanner;

public class Example {
    public static void main(String[] args){
    
        // create File object, read from filepath
        File file = new File("names.txt");
        
        // direct the scanner to a file
        try(Scanner reader = new Scanner(file)) {

            while (reader.hasNextLine()) {
                System.out.println(reader.nextLine());
            }

        } 
        catch (Exception e) {
            System.out.println("An error happened!");
        }
    }
}

Program outputs:
Jack
Jane
Pia
Pete
Andrew
Ann
Lisa
Larry