io - Two similar copy codes with Java, two behaviors -


so wanted implement function copies file new file of i'll specify directory (i'll create it) , then, found on stackoverflow, use files.copy function of apache.commons trick.

my problem following : write 2 codes, 1 works , other don't, except similar seem not capture difference...

here's code first method : 

public static void copytofile2 (string firmfoldername, string allfirmsfoldername, string copy_file_name, string copied_file_name) throws ioexception {          file = new file(copied_file_name) ;         string pathofdirectoryoftofile= "folder/" + allfirmsfoldername +"/" + firmfoldername ;          //string pathofdirectoryoftofile = "folder/fomrs/firm/" ;         string pathoftofile = pathofdirectoryoftofile + "/" + copy_file_name ;           (new file(pathofdirectoryoftofile)).mkdir();         file = new file(pathoftofile) ;          files.copy( from.topath(), to.topath() );      }

in one, have specify few parameters forge path directory, create directory , create copy file in there. throws nosuchfileexception, , while know file doesn't not exist, thought might nice , create itself, since didn't : went ahead , added to.createnewfile(); right after file instanciation make sure, i'll have following code : 

(new file(pathofdirectoryoftofile)).mkdir(); file = new file(pathoftofile) ; to.createnewfile();  files.copy( from.topath(), to.topath() );

with one, ioexception stating specified access path not found !

second method : 

public static void copytofile1 (string firmfoldername, string allfirmsfoldername, string copy_file_name, string copied_file_name) throws ioexception {          file = new file(copied_file_name) ;         string pathofdirectoryoftofile= "folder/" + allfirmsfoldername +"/" + firmfoldername +"/" ;          string pathoftofile = pathofdirectoryoftofile + "/" + copy_file_name ;           (new file("folder/mdjs55/")).mkdir();         file = new file("folder/mdjs55/tm.jsp" ) ;           files.copy( from.topath(), to.topath() );      }

in 1 works fine.

so ? difference can not path in copytofile2 dynamic , in second static, how supposed problem ? know it's merely string that's being build...

p.s : used system.out.println(to.topath()) check out path that, it's constructed.

thanks in advance help.

the path in second example shorter. mkdir() create 1 sub-directory if go 2 sub-directories fail , when try use file in directory fail.

i suspect want mkdirs() creates multiple-levels of directories required.


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