//Sample03_01.java

import java.io.File;

class Sample03_01{

    public static void main(String[] args){
      File file01 = new File("c:/Users/hoge/ws/pathname.txt");
      File file02 = new File("ws/pathname.txt");
      File file03 = new File("pathname.txt");
      File file04 = new File("c:/Users");
      File file05 = new File("c:");
      System.out.println("file01:\t" + file01.getParent());
      System.out.println("file02:\t" + file02.getParent());
      System.out.println("file03:\t" + file03.getParent());
      System.out.println("file04:\t" + file04.getParent());
      System.out.println("file05:\t" + file05.getParent());

    }
}