Paths specify the location of files and directories
File class can represent either a file or a directory
The actual resource created depends on the method called (mkdir() for directories and createNewFile() for files)
Creating directories
Import the File class
import java.io.File;
Creates a File object representing the directory
File newDirectory = new File("myDirectory");
Use .mkdir() creates the actual directory on the file system
boolean created = newDirectory.mkdir();
Returns true if the directory is created successfully
Returns false if the directory already exists or cannot be created
Listing files in a directory
Use .listFiles() to list files in directory
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// Creates a `File` object representing the directory `myDirectory`
File dir = new File("myDirectory");
//Retrieves an `array` of `File` objects representing the contents of `myDirectory`
File[] files = dir.listFiles();
Returns an array of File objects if the directory exists
Returns null if the directory does not exist
Retrieving a file's relative Path
Relative Path: location of a file/directory in relation to the current working directory
// Creates a `File` object for `sample.txt` inside `myDirectory`
File file = new File("myDirectory/sample.txt");
// Retrieves the relative path of the file as a String
String path = file.getPath();
System.out.println(path);
We assume myDirectory already exists; otherwise, file creation or writing will fail
Output:
myDirectory/sample.txt
Working with absolute paths
Absolute Path: the full path from the root of the file system
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// Creates a `File` object for `sample.txt` inside `myDirectory`
File file = new File("myDirectory/sample.txt");
// Retrieves the absolute path of the file as a String
String absPath = file.getAbsolutePath();
System.out.println(absPath);
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