14 weeks work

topic:

Write an application, enter a directory and a file type, display the directory meets all files of that type. Thereafter, the cut one of these files to another directory.

ps: do this before the first class section.

text.java

import java.io.*;
import java.util.Scanner;
public class text {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Scanner sc = new Scanner(System.in);
        System.out.print ( "Please enter a file path:" );
        String s1 = sc.nextLine();
        System.out.print ( "Please enter the file format suffix:" );
        String s2 = sc.nextLine();
        Path File = new new File (S1); // file path of 
        the FilenameFilter endName = new new getFilenames (S2); // file suffix 
        String [] of the filenames = path.list (endName);
        System.out.println ( "There are" + filenames.length + "a" + s2 + "type of file!" );
         For (String name: filenames) { // loop output file name matching 
            System.out.println (name );
        }
    }
    
}
    class getFilenames implements FilenameFilter{
        String style ;
        getFilenames(String style){
            this.style=style;
        }
        public boolean accept(File file, String name) {
            return name.endsWith(style);
        }
    }

result:

 

 

 Title II: read and write operations to complete

 

 

Code

/ ** Cut files to another directory
 * Method 2 Class 3
 */

import java.io.BufferedInputStream;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileWriter;
import java.io.FilenameFilter;
import java.io.IOException;
import java.io.InputStream;
import java.io.Writer;
import java.util.Scanner;

class of the type the implements FilenameFilter { // create interfaces FilenameFilter subclass 
    String str = null ;
    type (String STR) {                          // define a constructor method 
        the this .str = + "." STR;
    }
    public  Boolean accept (File the dir, String name) { // override method accept 
        return name.endsWith (STR); // matching field behind 
    }
}

public class Test {
    public static void main(String[] args) {
        Scanner reader = new Scanner(System.in);
        System.out.print ( "Please enter the directory: \ the n-" );
        Way String = reader.nextLine (); // temporary directory 
        File File = new new File (Way); // get the input directory 
        String [] = All file.list (); // call the no-argument method to get all the documents list name 
        System.out.print ( "file to the directory: \ n-" );
         for ( int I = 0; I <all.length; I ++) { // output 
            System.out.print (all [i] + " \ the n-" );
        }
        Of System.out.print ( "Please enter the file type of the directory requires: \ n-" );
        type filetype = new type(reader.nextLine());
        String [] Type = file.list (filetype); // call parameters for the file type list method to get the class file name 
        System.out.print ( "the file type of file to the directory: \ the n-" );
         for ( int I = 0; I <Type.length; I ++ ) {
            System.out.print(Type[i]+"\n");
        }
        System.out.print ( "Please enter the need to cut the file name: \ the n-" );
        Cut String = reader.nextLine (); // scratch file name 
        File cutfile = new new File (Way + "\\" + Cut); // stored in the original file 
        System.out.print ( "Please enter the file to be moved to directory: \ the n-" );
        Cutway String = reader.nextLine (); // temporary directory 
        File cutlist = new new File (cutway); // stored in the directory         
        File newfile = new new File (cutway + "\\" + Cut); // into a new directory new file 
        the try {
            newfile.createNewFile (); // create a file with the same name 
        } the catch (IOException E) {
            e.printStackTrace ();
        }
        InputStream InputStream = null ; // read the original contents of the file object is created 
        BufferedInputStream BufferedInputStream = null ;
        The Data String = ""; // contents of the register 
        Writer Writer = null ; // write the new contents of the file object is created 
        BufferedWriter BufferedWriter = null ;
         the try {
            inputStream = new FileInputStream(cutfile);
            BufferedInputStream = new new BufferedInputStream (inputStream);
             byte [] Content = new new  byte [1024]; // contents stored 
            int COUNT = 0; // record the length of 
            the while ! ((COUNT = bufferedInputStream.read (Content, 0, 1024)) = -1 ) {
                Data = Data + new new String (Content, 0, COUNT); // traversed bytes into strings 
            }
            writer = new FileWriter(newfile);
            bufferedWriter = new BufferedWriter(writer);
            bufferedWriter.write (Data); // string to the new file 
        } the catch (a FileNotFoundException E1) {
            e1.printStackTrace ();
        } catch (IOException e) {
            e.printStackTrace ();
        }finally{
            try {
                inputStream.close();
                bufferedWriter.close();
                writer.close();
            } catch (IOException e) {
                e.printStackTrace ();
            }
        }
        cutfile.delete (); // delete the original file 
    }
}

 

result: