I found out that although mkdirs() return false, directory did get created.  It 
just give wrong return code.  This is inconsistantly with the mkdir() 
method since mkdir("/a/) would create /a directory and return true.


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

class file{
        public static void main(String[] args){
                File f0=new File("a"+File.separator+"b"+File.separator);
                if (!f0.mkdirs())
                        System.err.println("Can't create directory " + f0.getPath());

                File f2=new File("c"+File.separator);
                if (!f2.mkdir())
                        System.err.println("Can't create directory " + f2.getPath());

        }
}