Read names from a file

The second problem in a UIL packet uses basic file input. Practice this one in your Java 26 IDE.

Input file: greetings.dat

3
Ari
Sam
Jo

The first line is the number of names. Each following line contains one name. Print a greeting for each name:

Hello, Ari!
Hello, Sam!
Hello, Jo!

Connect a Scanner to a File

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

public class FileGreetings {
    public static void main(String[] args) throws FileNotFoundException {
        try (Scanner input = new Scanner(new File("greetings.dat"))) {
            int count = input.nextInt();
            input.nextLine();
            // Read count names and print each greeting.
        }
    }
}

nextInt() reads the count but leaves the line ending behind. The first nextLine() consumes the rest of that line. Your loop can then read the names.

Save both files in the working directory used by your IDE. Compile and run FileGreetings.java, then compare your output with the example. Try a file with one name and a file with zero names, too.

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