Hadoop: Path.getFileSystem vs FileSystem.get-CodePudding

I'm writing a Java class to create a HDFS directory, but want to check whether the directory exists before creating the directory. I'm not sure whether to use Path.getFileSystem() or FileSystem.get():

Configuration conf = new Configuration();
Path path = new Path(args[1]);
FileSystem fs = path.getFileSystem(conf);
if(fs.exists(path)) {
  System.err.println("Dir already exists");
  }
boolean status = fs.mkdirs(path);

Or should I use the FileSystem.get() method:

Configuration conf = new Configuration();
Path path = new Path(args[1]);
FileSystem fs = FileSystem.get(conf);
boolean status = fs.mkdirs(path);
if(!status) {
  System.err.println("Dir already exists");
  }

When is it appropriate to use either of these: Path.getFileSystem() or FileSystem.get()?

CodePudding user response：

It depends if you already have a non-null Path object.

The null-safe approach would be to use a Configuration object with static method FileSystem.get(conf)