public static boolean equal(File file1, File file2) throws IOException {
    checkNotNull(file1);
    checkNotNull(file2);
    if (file1 == file2 || file1.equals(file2)) {
      return true;
    }

    /*
     * Some operating systems may return zero as the length for files denoting system-dependent
     * entities such as devices or pipes, in which case we must fall back on comparing the bytes
     * directly.
     */

  @CanIgnoreReturnValue
  private boolean delete(File file) {
    if (file.isDirectory()) {
      File[] files = file.listFiles();
      if (files != null) {
        for (File f : files) {
          if (!delete(f)) {
            return false;
          }
        }
      }
    }

    if (!file.delete()) {
      logger.log(Level.WARNING, "couldn't delete file: {0}", new Object[] {file});
      return false;

  }

  private static File fullpath(String path) {
    return new File(new File(path).toURI());
  }

  private static URL makeJarUrlWithName(String name) throws IOException {
    /*
     * TODO: cpovirk - Use java.nio.file.Files.createTempDirectory instead of
     * c.g.c.io.Files.createTempDir?
     */
    File fullPath = new File(Files.createTempDir(), name);
    File jarFile = pickAnyJarFile();

  }

  private static File fullpath(String path) {
    return new File(new File(path).toURI());
  }

  private static URL makeJarUrlWithName(String name) throws IOException {
    /*
     * TODO: cpovirk - Use java.nio.file.Files.createTempDirectory instead of
     * c.g.c.io.Files.createTempDir?
     */
    File fullPath = new File(Files.createTempDir(), name);
    File jarFile = pickAnyJarFile();

    File dir2 = newFile("dir-1/dir-2");

    assertThat(Files.fileTraverser().breadthFirst(rootDir))
        .containsExactly(rootDir, fileA, fileB, dir1, dir2);
  }

  @CanIgnoreReturnValue
  private File newDir(String name) {
    File file = new File(rootDir, name);
    file.mkdir();
    return file;
  }

  @CanIgnoreReturnValue
  private File newFile(String name) throws IOException {

   * line-termination characters, but do include other leading and trailing whitespace.
   *
   * <p>Does not close the {@code Readable}. If reading files or resources you should use the {@link
   * Files#readLines} and {@link Resources#readLines} methods.
   *
   * @param r the object to read from
   * @return a mutable {@link List} containing all the lines

        },
        {
          "group": "com.google.j2objc",
          "module": "j2objc-annotations",
          "version": {
            "requires": "${j2objc.version}"
          }
        }
      ],
      "files": [
        {
          "name": "${project.build.finalName}.jar",
          "url": "${project.build.finalName}.jar"
        }
      ],
      "capabilities": [
        {
          "group": "com.google.guava",

    private final ThreadLocal<File> fileThreadLocal = new ThreadLocal<>();

    protected File createFile() throws IOException {
      File file = File.createTempFile("SinkSourceFile", "txt");
      fileThreadLocal.set(file);
      return file;
    }

    protected File getFile() {
      return fileThreadLocal.get();
    }

  @CanIgnoreReturnValue
  private boolean delete(File file) {
    if (file.isDirectory()) {
      File[] files = file.listFiles();
      if (files != null) {
        for (File f : files) {
          if (!delete(f)) {
            return false;
          }
        }
      }
    }

    if (!file.delete()) {
      logger.log(Level.WARNING, "couldn't delete file: {0}", new Object[] {file});
      return false;

 * nullness annotations in particular will outweigh the costs. (And it's worth noting that we have
 * released multiple ListenableFuture.class files that are not byte-for-byte compatible even from
 * the beginning, thanks to using different `-source -target` values for compiling our `-jre` and
 * `-android` "flavors.")
 *