What will the following code output if the "example.txt" file exists and contains multiple lines of text?

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
public class ReadFirstLine {
    public static void main(String[] args) {
        try (BufferedReader br = new BufferedReader(new FileReader("example.txt"))) {
            System.out.println(br.readLine());
        } catch (IOException e) {
            System.out.println("Error reading file.");
        }
    }
}