Deep learning of file classes (ultra-simple Files manager)--"Thinking in Java" essay 028

1 //: Makedirectories.java2  PackageC10;3 4 ImportJava.io.File;5 ImportJava.text.SimpleDateFormat;6 Importjava.util.Date;7 8 /**9 * @time: Afternoon 7:59:23Ten * @date: April 29, 2017 One * @auther: Skyfffire A *    @version: v0.1 - */ -  Public classmakedirectories { the     Private Final StaticString Usage -= "\n\n1." Usage:makedirectories path1...\n " -+ "\tcreates each path\n\n" -+ "2.usage:makedirectories-d path1...\n" ++ "\tdeletes each path\n\n" -+ "3.usage:makedirectories-r path1 path2...\n" ++ "\trenames from path1 to path2\n\n"; A      at     /** - * How to use -      */ -     Private Static voidusage () { - System.out.println (usage); -System.exit (1); in     } -      to     /** + * Show details of a path -      *  the      * @paramf The path that needs to be displayed *      */ $     Private Static voidFileData (File f) {Panax NotoginsengSystem.out.println ("\n\nabsolute path:" +F.getabsolutepath ()); -SYSTEM.OUT.PRINTLN ("Can read:" +F.canread ()); theSystem.out.println ("Can Write:" +f.canwrite ()); +System.out.println ("GetName:" +f.getname ()); ASystem.out.println ("GetParent:" +f.getparent ()); theSystem.out.println ("GetPath:" +F.getpath ()); +System.out.println ("Length:" +f.length ());  -System.out.println ("LastModified:" $+NewSimpleDateFormat ("Yy-mm-dd"). $FormatNewDate (f.lastmodified () )); -          -         if(F.isfile ()) { theSystem.out.println ("It ' s a file.")); -}Else if(F.isdirectory ()) {WuyiSystem.out.println ("It ' s a directory.")); the         } -          WuSystem.out.println ("\ n")); -     } About      $     /** - * Print all path in current directory -      */ -     Private Static voidPrintpath () { A System.out.println (); +          theFile point =NewFile ("."); -          $string[] Path =point.list (); the          the          for(String nowstring:path) { the System.out.println (nowstring); the         } -          in System.out.println (); the     } the      About      Public Static voidMain (string[] args) { the Printpath (); the          the         if(Args.length < 1) { + usage (); -         } the         Bayi         //Update path name command the         if(Args[0].equals ("-R")) { the             if(Args.length! = 3) { - usage (); -}Else { theFile old =NewFile (args[1]); theFile Rname =NewFile (args[2]); the                  the                 if(Old.exists () &&!rname.exists ()) { -                     //Update file name the Old.renameto (rname); the}Else { theSYSTEM.OUT.PRINTLN ("Rename error:"94+ old.getname () + "to" +rname.getname ()); the                 } the                  the                 //Printing Information98 fileData (old); About FileData (rname); -             }101}//Execute Delete command102         Else if(Args[0].equals ("-D")) {103              for(intCount = 1; Count < Args.length; count++) {104File f =NewFile (Args[count]); the                 106                 //determine if f exists107                 if(F.exists ()) {108System.out.println (f + "exists"));109                      theSYSTEM.OUT.PRINTLN ("Deleting ..." +f);111 F.delete (); the 113 FileData (f); the}Else { theSystem.out.println (f + "path is not found.")); the                 }117             }118}//Execute Create command119         Else { -              for(intCount = 0; Count < Args.length; count++) {121File f =NewFile (Args[count]);122                 123 f.mkdirs ();124                 //the difference between F.mkdir () and F.mkdirs () is that the                 //mkdir cannot create a folder in a directory that does not exist126                 127System.out.println ("created" +f); - 129 FileData (f); the             }131         } the         133 Printpath ();134     }135 }136 137 ///:~

Optimized some of the unreasonable parts of the original book. The runtime places the argument list after Java XXX.

Deep learning of file classes (ultra-simple Files manager)--"Thinking in Java" essay 028