Fifth time Assignment

Import Java.awt.BorderLayout;

Import Java.awt.Color;

Import Java.awt.ScrollPane;

Import Java.io.File;

Import Javax.swing.JComboBox;

Import Javax.swing.JFrame;

Import Javax.swing.JLabel;

Import javax.swing.JList;

Import Javax.swing.JScrollPane;

Import Javax.swing.ListSelectionModel;

public class File {

Private static final file FileUtils = null;

/**

Lists the names of all files and subdirectories under the specified directory @throws illegalaccessexception

*/

public static void ListDirectory (File dir) throws

illegalaccessexception{// determines if the file object dir exists, using the file class's exists () method

if (!dir.exists ()) {

throws an exception if it does not exist

throw new Illegalaccessexception (" directory " + dir + " does not exist "); }

To determine if dir is a directory, use the isdirectory () method of the File class

if (!dir.isdirectory ()) {

if dir is not a directory, throw an exception

throw new IllegalArgumentException (dir + " not directory "); }

obtain the files and subdirectories under dir of the specified directory and output (1.list (); 2.listFiles ())

use the list () method to implement

string[] FileName = Dir.list ();

for (String s:filename) {

System.out.println (dir+ "/" +s);

}

System.out.println ();

use the listfiles () method to implement all file names that are listed in the directory only

file[] files = dir.listfiles ();

for (File file:files) {

if it is a file, the output

if (File.isfile ()) {

System.out.println (file);

}

}

JFrame a =new JFrame (" file directory ");

A.setdefaultcloseoperation (Jframe.exit_on_close);

A.setlayout (New BorderLayout ());

JLabel Northlabel = new JLabel ("Files list");

A.add (Northlabel,borderlayout.north);

JList list = new JList (files);

List.setforeground (New Color (140,200,220));

List.setbackground (Color.White);

List.setselectionbackground (New Color (100,80,150));

List.setselectionforeground (New Color (140,200,220));

JScrollPane sp = new JScrollPane (list);

A.add (Sp,borderlayout.center);

A.setbounds (400,300,400,300);

A.setvisible (TRUE);

}

public static void Main (string[] args) {

TODO auto-generated Method Stub

try {

Fileutils.listdirectory (New File ("D:\"));

} catch (Illegalaccessexception d) {

TODO auto-generated Catch block

D.printstacktrace ();

}

}

}

Fifth time Assignment