Java - File이 존재하는지 확인

import java.io.File;
import java.io.IOException;

public class FileExistsExample {

    public static void main(String[] args) throws IOException {

        File file1 = new File("/home/mjs/tests");
        if (file1.exists()) {
            if (file1.isDirectory()) {
                System.out.println("file1: dir exists");
            } else {
                System.out.println("file1: file exists");
            }
        }

        File file2 = new File("/home/mjs/tests/test1.txt");
        if (file2.exists()) {
            if (file2.isDirectory()) {
                System.out.println("file2: dir exists");
            } else {
                System.out.println("file2: file exists");
            }
        }

    }
}

file1: dir exists
file2: file exists

import java.io.File;
import java.io.IOException;

public class FileExistsExample2 {

    public static void main(String[] args) throws IOException {

        File file1 = new File("/home/mjs/tests");
        if (file1.isFile()) {
            System.out.println("file1 exists");
        }

        File file2 = new File("/home/mjs/tests/test1.txt");
        if (file2.isFile()) {
            System.out.println("file2 exists");
        }

    }
}

file2 exists

import java.io.File;
import java.io.IOException;
import java.nio.file.Path;
import java.nio.file.Paths;

public class FileExistsExample3 {

    public static void main(String[] args) throws IOException {

        Path path = Paths.get("/home/mjs/tests/test1.txt");
        if (path.toFile().isFile()) {
            System.out.println("file1 exists");
        }

        File file = path.toFile();
        if (file.exists() && !file.isDirectory()) {
            System.out.println("file1 exists");
        }

    }
}

file1 exists
file1 exists