Java article: Basic API for the file class

1  PackageAres.io;2 3 ImportJava.io.File;4 Importjava.io.IOException;5 6  Public classMain {7 8      Public Static voidMain (string[] args) {9         //TODO auto-generated Method StubTenFile File =NewFile ("C:\\javas"); One         //file File1 = new file ("C:" +file.separator+ "Javas");//file.separator separators, common to multiple systems A         if(!file.exists ()) { -File.mkdir ();//Create a folder -             //file.mkdirs ();//Create a multilevel catalog the}Else { -File.delete ();//Delete directory -         } -          +System.out.println (file);//Direct Access is file.tostring () -System.out.println (File.isdirectory ());//whether it is a directory +System.out.println (File.isfile ());//whether it is a file ASystem.out.println (File.getabsolutepath ());//Get Path atSystem.out.println (File.getname ());//get File (folder) name -          -File file2=NewFile ("c:\\javas\\ log. txt"); -         //file File2=new file ("C:\\javas", "Log. txt");//the second way to create a file heap box -         if(!file2.exists ()) { -             Try { inFile2.createnewfile ();//Create a file -}Catch(IOException e) { to                 //TODO auto-generated Catch block + e.printstacktrace (); -             } the}Else { * File2.delete (); $         }Panax NotoginsengSystem.out.println (File2.getparent ());//Get Parent Directory -System.out.println (File2.getname ());//Get file name the     } +  A}

1     /*2 * Traverse file directory3      */4      Public Static voidListDirectory (File dir)throwsIOException {5         if(!dir.exists ()) {6             Throw NewIllegalArgumentException ("directory" + dir + "does not exist");7         }8         if(!dir.isdirectory ()) {9             Throw NewIllegalArgumentException (dir + "not directory");Ten         } One System.out.println (dir); Afile[] Files =dir.listfiles (); -         //string[] filenames= dir.list ();//file (folder) an array group under directory -         if(Files! =NULL&& files.length > 0) { the              for(File file:files) { - System.out.println (file); -                 if(File.isdirectory ()) { - listdirectory (file); +                 } -             } +         } A}

Java article: Basic API for the file class