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

public class ManageContent {
  private int dir_deep=0;
  private int dir_size = 0;
  private int sourcepath_deep; //输入路径相对于根目录的深度
  private Hashtable ht=new Hashtable(); //储存输入路径下的所有子目录，及其相对于根目录的深度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;
  }