[java] How do I get a file's directory using the File object?

Consider the code:

File file = new File("c:\\temp\\java\\testfile");

testfile is a file, and it may or may not exist. I want to get the directory c:\\temp\\java\\ using the File object. How do I go about doing this?

String parentPath = f.getPath().substring(0, f.getPath().length() - f.getName().length()); 

This would be my solution

I found this more useful for getting the absolute file location.

File file = new File("\\TestHello\\test.txt");
System.out.println(file.getAbsoluteFile());

File API File.getParent or File.getParentFile should return you Directory of file.

Your code should be like :

    File file = new File("c:\\temp\\java\\testfile");
    if(!file.exists()){
        file = file.getParentFile();
    }

You can additionally check your parent file is directory using File.isDirectory API

if(file.isDirectory()){
    System.out.println("file is directory ");
}

File.getParent() from Java Documentation

If you do something like this:

File file = new File("test.txt");
String parent = file.getParent();

parent will be null.

So to get directory of this file you can do next:

parent = file.getAbsoluteFile().getParent();

File directory = new File("Enter any 
                directory name or file name");
boolean isDirectory = directory.isDirectory();
if (isDirectory) {
  // It returns true if directory is a directory.
  System.out.println("the name you have entered 
         is a directory  : "  +    directory);  
  //It returns the absolutepath of a directory.
  System.out.println("the path is "  + 
              directory.getAbsolutePath());
} else {
  // It returns false if directory is a file.
  System.out.println("the name you have
   entered is a file  : " +   directory);
  //It returns the absolute path of a file.
  System.out.println("the path is "  +  
            file.getParent());
}

You can use this

 File dir=new File(TestMain.class.getClassLoader().getResource("filename").getPath());

File filePath=new File("your_file_path");
String dir="";
if (filePath.isDirectory())
{
    dir=filePath.getAbsolutePath();
}
else
{
    dir=filePath.getAbsolutePath().replaceAll(filePath.getName(), "");
}