Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
//License from project: Apache License 

import java.io.*;

public class Main {
    /**
     * Try to delete directory in a fast way.
     */
    public static void deleteDirectoryQuickly(File dir) throws IOException {

        if (!dir.exists()) {
            return;
        }
        final File to = new File(dir.getAbsolutePath() + System.currentTimeMillis());
        dir.renameTo(to);
        if (!dir.exists()) {
            // rebuild
            dir.mkdirs();
        }

        // try to run "rm -r" to remove the whole directory
        if (to.exists()) {
            String deleteCmd = "rm -r " + to;
            Runtime runtime = Runtime.getRuntime();
            try {
                Process process = runtime.exec(deleteCmd);
                process.waitFor();
            } catch (IOException e) {

            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
        if (!to.exists()) {
            return;
        }
        deleteDirectoryRecursively(to);
        if (to.exists()) {
            to.delete();
        }
    }

    /**
     * recursively delete
     *
     * @param dir
     * @throws java.io.IOException
     */
    public static void deleteDirectoryRecursively(File dir) throws IOException {
        File[] files = dir.listFiles();
        if (files == null) {
            throw new IllegalArgumentException("not a directory: " + dir);
        }
        for (File file : files) {
            if (file.isDirectory()) {
                deleteDirectoryRecursively(file);
            }
            if (!file.delete()) {
                throw new IOException("failed to delete file: " + file);
            }
        }
    }
}