Learn to summarize Java input and output streams

Mind Mapping

Code actual Demo

1  PackageCom.hanqi.io;2 3 ImportJava.io.*;4 5  Public classTest1 {6 7      Public Static voidMain (string[] args) {8         //file Files9         Ten         //Construction Method (file full path + file name) OneFile File =NewFile ("D:\\test1.txt"); A  -         //determine if a file exists -         if(File.exists ()) the         { -System.out.println ("File exists"); -              -System.out.println ("GetAbsolutePath =" +File.getabsolutepath ()); +              -System.out.println ("getParent =" +file.getparent ()); +              ASystem.out.println ("GetName =" +file.getname ()); at              -             //Deleting Files -             //File.delete (); -              -             //Renaming a file -File.renameto (NewFile ("D:/test2.txt")); in              -              to         } +         Else -         { the              *SYSTEM.OUT.PRINTLN ("File does not exist"); $             Panax Notoginseng             //Create a new file -             //Controllable Exception the             Try +             { A                  the file.createnewfile (); +              -System.out.println ("File creation succeeded"); $              $             } -             Catch(IOException e) -             { the                  -System.out.println ("File creation failed");Wuyi                  the e.printstacktrace (); -             } Wu         } -          About      $          -     } -  -}

Create a file

 PackageCom.hanqi.io;ImportJava.io.*; Public classText2 { Public Static voidMain (string[] args) {//Operating DirectoryFile dir =NewFile ("D:/test/test"); if(!dir.exists ()) {            //Create a directory            if(Dir.mkdirs ()) {System.out.println ("Create directory Success"); }            Else{System.out.println ("Failed to create directory"); }} File File=NewFile ("D:/test/test.txt");//specify a specific file        if(File.exists ()) {}Else        {            Try{file.createnewfile (); System.out.println ("Create file succeeded"); }            Catch(IOException e) {e.printstacktrace (); System.out.println ("Failed to create directory"); }                    }    }}

Learn to summarize Java input and output streams