JAVA EE: Java Tutorial : Java IO (Java File - How to delete directory

Tuesday 22 November 2016

Java Tutorial : Java IO (Java File - How to delete directory - recursive delete)

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Java Tutorial : Java IO (Java File - How to delete directory - recursive delete)

DeleteDirectory.java

import java.io.File;
import java.io.IOException;

public class DeleteDirectory
{

    private static final String SRC_FOLDER = "D:/work/java";

    public static void main(String[] args) throws IOException
    {

        File file = new File(SRC_FOLDER);
        /*
         * make sure directory exists
         */
        if (!file.exists())
        {
            System.out.println("Directory does not exist.");
        }
        else
        {
            DeleteDirectory deleteDirectory = new DeleteDirectory();
            deleteDirectory.deleteDir(file);
        }

    }

    public void deleteDir(File file) throws IOException
    {

        if (file.isDirectory())
        {

            /*
             * If directory is empty, then delete it
             */
            if (file.list().length == 0)
            {
                deleteEmptyDir(file);
            }
            else
            {
                // list all the directory contents
                File files[] = file.listFiles();

                for (File fileDelete : files)
                {
                    /*
                     * Recursive delete
                     */
                    deleteDir(fileDelete);
                }

                /*
                 * check the directory again, if empty then 
                 * delete it.
                 */
                if (file.list().length == 0)
                {
                    deleteEmptyDir(file);
                }
            }

        }
        else
        {
            /*
             * if file, then delete it
             */
            file.delete();
            System.out.println("File is deleted : " + file.getAbsolutePath());
        }
    }

    private void deleteEmptyDir(File file)
    {
        file.delete();
        System.out.println("Directory is deleted : " + file.getAbsolutePath());
    }

}

Output

File is deleted : D:\work\java\index.html
File is deleted : D:\work\java\jsp\async\async1.jsp
....
....
File is deleted : D:\work\java\websocket-deprecated\echo.html
Directory is deleted : D:\work\java