Read from a File

To read a file's contents as a String you can use the readString static method from java.nio.file.Files.

Path tasksPath = Path.of("tasks.txt");
String tasks = Files.readString(tasksPath);

Similarly to Files.writeString, this can throw an IOException if something goes wrong¹.

This can be dealt with in the same way. Either declare the IOException in a throws clause or re-throw an unchecked exception.

import java.nio.file.Files;
import java.nio.file.Path;

class Main {
    void main() throws IOExeption {
        Path tasksPath = Path.of("tasks.txt");
        String tasks = Files.readString(tasksPath);

        System.out.println(tasks);
    }
}

If you choose to re-throw any IOException as an unchecked exception then it might be helpful to remember that delayed assignment is allowed in that context.²

import java.nio.file.Files;
import java.nio.file.Path;

class Main {
    void main() {
        Path tasksPath = Path.of("tasks.txt");

        String tasks;
        try {
            tasks = Files.readString(tasksPath);
        }
        catch (IOException e) {
            throw new UncheckedIOException(e);
        }

        System.out.println(tasks);
    }
}