CODEWITHSUNDEEP
javapath
Hùng Nguyễn
Hùng Nguyễn

Reputation: 629

Is there a better to get last element of an absolute path in java?

I have many strings like this D:\just\a\path, the string might differ in number of elements, maybe C:\just\another\longer\path.

I want to get the last element path. I tried using substring:

myString.substring(myString.lastIndexOf("/")+1)

and Path:

nameo1 = Paths.get(string).getName(Paths.get(string).getNameCount() -1); //-1 because of root

but second method seems not to work with all operating system.

My question is: Is there any better, more elegant method to get exactly what I want?

NOTE: the final element is a directory, a folder, not a file. So new File(string).getName() won't work and just return nothing.

Edit: It was my bad. sometimes the string is empty so it return nothing. Cost me an hour working with it. Edit2: Some file paths contain white space, thus this method return an empty string

Upvotes: 6

Views: 14170

Answers (4)

Fidel Gonzo
Fidel Gonzo

Reputation: 574

Get last Directory of a path:

Paths.get(path).getParent().getFileName();

Upvotes: 1

deHaar
deHaar

Reputation: 18558

You can (and nowadays should) use java.nio.file.Path.getFileName(), which works like this for paths to files or directories (no matter if the String ends with a backslash or not):

public static void main(String[] args) {
    String pathStringToAFile = "U:\\temp\\TestOutput\\TestFolder\\test_file.txt";
    String pathStringToAFolder = "U:\\temp\\TestOutput\\TestFolder";
    String pathStringToAFolderWithTrailingBackslash = "U:\\temp\\TestOutput\\TestFolder\\";

    Path pathToAFile = Paths.get(pathStringToAFile);
    Path pathToAFolder = Paths.get(pathStringToAFolder);
    Path pathToAFolderWithTrailingBackslash 
                        = Paths.get(pathStringToAFolderWithTrailingBackslash);

    System.out.println(pathToAFile.getFileName().toString());
    System.out.println(pathToAFolder.getFileName().toString());
    System.out.println(pathToAFolderWithTrailingBackslash.getFileName().toString());
}

This outputs

test_file.txt
TestFolder
TestFolder

Upvotes: 7

Kenneth S
Kenneth S

Reputation: 66

You could use String.split:


    String path = "D:\just\a\path";
    String[] directories = path.split("\");
    String last = directories[directories.size-1];

Upvotes: 1

Евгений Колпаков
Евгений Колпаков

Reputation: 92

  public static void main(String[] args) {
    // String str = "C:\\just\\another\\longer\\path\\";
    // String str = "/path/with/right/slashes/works/too/";
       String str = "C:\\and\\path\\with/mixed/slashes/works/too/";

    // String str = "C:\\just\\another\\longer\\path";
    // String str = "/path/with/right/slashes/works/too";
    // String str = "C:\\and\\path\\with/mixed/slashes/works/too";

    String name = Paths.get(str.replace('\\', '/')).toFile().getName();

    System.out.println("name = " + name);

  }

Upvotes: 0

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