Java java.nio.file.FileSystem用法及代码示例

// Java program to Create a new FileSystem object and
// print its file stores and root directories
// Importing required classes from java.nio package
// Importing input output classes
import java.io.*;
import java.nio.file.FileStore;
import java.nio.file.FileSystem;
import java.nio.file.FileSystems;
import java.nio.file.Path;
// Main class
public class GFG {
    // Main driver method
    public static void main(String[] args)
    {
        // Try block to check for exceptions
        try {
            // Create a new File system Object
            FileSystem filesystem
                = FileSystems.getDefault();
            // Display messages only
            System.out.println(
                "File System created successfully");
            System.out.println(
                "Underlying file stores of this FileSystem :");
            // Print the Underlying file stores of this
            // FileSystem using for each loop
            for (FileStore store :
                 filesystem.getFileStores()) {
                System.out.println(store.toString());
            }
            // Display message only
            System.out.println(
                "Root directories of this FileSystem :");
            for (Path rootdir :
                 filesystem.getRootDirectories()) {
                // Print the Root directories of this
                // FileSystem using standard toString()
                // method
                System.out.println(rootdir.toString());
            }
        }
        // Catch block to handle exceptions
        catch (Exception e) {
            // Print the exception along with
            // line number where it occurred
            e.printStackTrace();
        }
    }
}

// Java program to illustrate Working of FileSystem Class
// Via its Methods
// importing required classes from java.nio package
// Importing input output classes
import java.io.*;
import java.nio.file.FileSystem;
import java.nio.file.FileSystems;
// Main class
public class GFG {
    // Main driver method
    public static void main(String[] args)
    {
        // Try block to check for exceptions
        try {
            // Creating an object of FileSystem class in the
            // main() method using getDefault() method
            FileSystem filesystem
                = FileSystems.getDefault();
            // Display message only
            System.out.println(
                "FileSystem created successfully");
            // Checking if file system is open or close
            if (filesystem.isOpen())
                // Print statement
                System.out.println("File system is open");
            else
                // Print statement
                System.out.println("File system is close");
            // Check if file system is read-only
            if (filesystem.isReadOnly())
                // Print statement
                System.out.println(
                    "File system is Read-only");
            else
                // Print statement
                System.out.println(
                    "File system is not Read-only");
            // Now, print the name separator
            // using getSeparator() method
            System.out.println("Separator: "
                               + filesystem.getSeparator());
            // Print hash value of this file system
            // using hashCode() method
            System.out.println("Hashcode: "
                               + filesystem.hashCode());
            // Print provider of this file system
            System.out.println(
                "Provider: "
                + filesystem.provider().toString());
        }
        // Catch block to handle the exceptions
        catch (Exception e) {
            // Print the exception along with line number
            // using printStackTrace() method and
            // display it on the console
            e.printStackTrace();
        }
    }
}