file - Java mkdir will not work -

i have method trying create sub directory stations folder. needed directories made before method called. folders have normal positions , not hidden.

private void movefiles(){     string[] dates = getdates();     //file oldfile = new file("/stations/currentfiles/");     file newfile = new file("/stations/" + dates[0].replaceall("/", "-") + "-" + dates[1].replaceall("/", "-") + "_" + system.currenttimemillis() + "/");     if(!newfile.exists()){         if(newfile.mkdir()){             system.out.println(newfile.ishidden());         }else{             system.out.println("error");             system.out.println(newfile.ishidden());         }     } } 

not understanding make not make directory.

i check make sure have write permissions directory; try newfile.canwrite().