* Copyright (c) 2004, 2011, Oracle and/or its affiliates. All rights reserved.

import java.io.BufferedReader;

import java.io.BufferedWriter;

import java.io.File;

import java.io.IOException;

import java.nio.charset.Charset;

import static java.nio.file.Files.*;

import static java.nio.file.StandardOpenOption.*;

    static final String setting =

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

        if (args != null && args.length > 1) {

            File f = new File(args[1]);

            switch (args[0]) {

                case "-r":

                    System.out.println("reading file: " + args[1]);

                    String str = null;

                    try (BufferedReader in = newBufferedReader(f.toPath(),

                                    Charset.defaultCharset())) {

                        str = in.readLine().trim();

                    }

                    if (setting.equals(str)) {

                        System.out.println("Compared ok");

                    } else {

                        System.out.println("Compare fails");

                        System.out.println("EXPECTED: " + setting);

                        System.out.println("OBTAINED: " + str);

                        throw new RuntimeException("Test fails: compare failed");

                    }

                    break;

                case "-w":

                    System.out.println("writing file: " + args[1]);

                    try (BufferedWriter out = newBufferedWriter(f.toPath(),

                                    Charset.defaultCharset(), CREATE_NEW)) {

                        out.write(setting);

                    }

                    break;

                default:

                    throw new RuntimeException("ERROR: invalid arguments");

            throw new RuntimeException("ERROR: invalid arguments");

    }