anchor.diff:      }
       return files;
     }
  -  File _newFile() => new File.fromPath(_path);
  -  Directory _newDirectory() => new Directory.fromPath(_path);
  +  File _newFile() => new File(_path);
  +  Directory _newDirectory() => new Directory(_path);
   }
  
positive.code: class JavaFile {
    static final String separator = Platform.pathSeparator;
    static final int separatorChar = Platform.pathSeparator.codeUnitAt(0);
    Path _path;
    JavaFile(String path) {
      this._path = new Path(path);
    }
    JavaFile.relative(JavaFile base, String child) {
      if (child.isEmpty) {
        this._path = base._path;
      } else {
        this._path = base._path.join(new Path(child));
      }
    }
    JavaFile.fromUri(Uri uri) : this(uri.path);
    int get hashCode => _path.hashCode;
    bool operator ==(other) {
      return other is JavaFile && other._path.toNativePath() == _path.toNativePath();
    }
    String getPath() => _path.toNativePath();
    String getName() => _path.filename;
    String getParent() {
      var result = _path.directoryPath.toNativePath();
      // "." or  "/" or  "C:\"
      if (result.length < 4) return null;
      return result;
  
negative.code: library java.io;
  
  import "dart:io";
  import 'package:path/path.dart' as pathos;
  
  class JavaSystemIO {
    static Map<String, String> _properties = new Map();
  