Project experience - Create a new file in the directory, and file read and write

Create a new directory in the file - Project experience the number of bytes to be written to the file, and then read the file

　　

 1 package Test;
 2 import java.io.File;
 3 import java.io.IOException;
 4 import java.nio.file.Files;
 5 import java.nio.file.Path;
 6 import java.nio.file.Paths;
 7 public class FileTest {
 8 
 9     public static void main(String[] args) throws IOException 
10     {
11         File file=new File("F:/abc/aa.txt");
12         File parentFile=file.getParentFile();// Get new directory of the parent directory 
13 is          IF (! ParentFile.exists ())
 14          {
 15              parentFile.mkdirs (); // if not, the parent directory is created, i.e., F: / abc / catalog 
16          }
 . 17          Boolean file.createNewFile = B (); // Create a new file 
18 is          IF (B)
 . 19          {
 20 is              Path Paths.get P = ( "F.: /abc/aa.txt"); // Get Path object of this file 
21 is              files .write (p, "the content of the test document" .getBytes ( "UTF-. 8")); // write data to a file 
22 is              Long ; size = Files.size (P) // number of bytes returned file 
23             System.out.println ( "total written document" + size + "bytes" );
 24          }
 25          the else 
26 is          {
 27              System.out.println ( "file creation failed" );
 28          }
 29      }
 30  
31 is }

　　The premise of the implementation of the above code is: There is no abc folder F disc, otherwise the file creation failed.