import java.io.*;
import java.util.*;

public class ManageContent {
  PRivate int dir_deep=0;
  private int dir_size = 0;
  private int sourcepath_deep; //輸入路徑相對于根目錄的深度
  private Hashtable ht=new Hashtable(); //儲存輸入路徑下的所有子目錄，及其相對于根目錄的深度keys=(String)dirPath,values=(Integer)dirDeep

  public synchronized int getSize(String dir_path) throws FileNotFoundException {
    File dir = new File(dir_path);
    if (!dir.exists()) {
      throw new FileNotFoundException();
    }
    if (!dir.isDirectory()) {
      dir_size = (int) dir.length();
    }
    else {
      File[] fe = dir.listFiles();
      for (int i = 0; i < fe.length; i++) {
        if (fe[i].isDirectory()) {
          getSize(fe[i].toString());
        }
        else {
          dir_size += fe[i].length();
        }
      }
    }
    return dir_size;
  }

  public synchronized void deleteFiles(String dir_path) throws FileNotFoundException {
    File file = new File(dir_path);
    if (!file.exists()) {
      throw new FileNotFoundException();
    }
    if (file.isDirectory()) {
      File[] fe = file.listFiles();
      for (int i = 0; i < fe.length; i++) {
        deleteFiles(fe[i].toString());
        fe[i].delete(); //刪除已經是空的子目錄
      }
    }
    file.delete(); //刪除總目錄
  }